938 lines
32 KiB
Java
938 lines
32 KiB
Java
/*
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* Copyright (C) 2011 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.gson.internal.bind;
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import java.io.IOException;
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import java.lang.reflect.AccessibleObject;
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import java.lang.reflect.Field;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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import java.net.InetAddress;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.net.URL;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.util.ArrayList;
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import java.util.BitSet;
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import java.util.Calendar;
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import java.util.Currency;
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import java.util.GregorianCalendar;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.StringTokenizer;
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import java.util.UUID;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.atomic.AtomicIntegerArray;
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import com.google.gson.Gson;
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import com.google.gson.JsonArray;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonIOException;
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import com.google.gson.JsonNull;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonPrimitive;
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import com.google.gson.JsonSyntaxException;
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import com.google.gson.TypeAdapter;
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import com.google.gson.TypeAdapterFactory;
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import com.google.gson.annotations.SerializedName;
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import com.google.gson.internal.LazilyParsedNumber;
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import com.google.gson.reflect.TypeToken;
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import com.google.gson.stream.JsonReader;
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import com.google.gson.stream.JsonToken;
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import com.google.gson.stream.JsonWriter;
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/**
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* Type adapters for basic types.
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*/
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public final class TypeAdapters {
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private TypeAdapters() {
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throw new UnsupportedOperationException();
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}
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@SuppressWarnings("rawtypes")
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public static final TypeAdapter<Class> CLASS = new TypeAdapter<Class>() {
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@Override
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public void write(JsonWriter out, Class value) throws IOException {
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throw new UnsupportedOperationException("Attempted to serialize java.lang.Class: "
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+ value.getName() + ". Forgot to register a type adapter?");
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}
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@Override
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public Class read(JsonReader in) throws IOException {
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throw new UnsupportedOperationException(
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"Attempted to deserialize a java.lang.Class. Forgot to register a type adapter?");
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}
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}.nullSafe();
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public static final TypeAdapterFactory CLASS_FACTORY = newFactory(Class.class, CLASS);
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public static final TypeAdapter<BitSet> BIT_SET = new TypeAdapter<BitSet>() {
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@Override public BitSet read(JsonReader in) throws IOException {
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BitSet bitset = new BitSet();
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in.beginArray();
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int i = 0;
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JsonToken tokenType = in.peek();
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while (tokenType != JsonToken.END_ARRAY) {
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boolean set;
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switch (tokenType) {
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case NUMBER:
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case STRING:
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int intValue = in.nextInt();
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if (intValue == 0) {
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set = false;
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} else if (intValue == 1) {
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set = true;
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} else {
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throw new JsonSyntaxException("Invalid bitset value " + intValue + ", expected 0 or 1; at path " + in.getPreviousPath());
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}
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break;
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case BOOLEAN:
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set = in.nextBoolean();
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break;
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default:
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throw new JsonSyntaxException("Invalid bitset value type: " + tokenType + "; at path " + in.getPath());
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}
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if (set) {
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bitset.set(i);
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}
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++i;
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tokenType = in.peek();
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}
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in.endArray();
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return bitset;
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}
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@Override public void write(JsonWriter out, BitSet src) throws IOException {
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out.beginArray();
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for (int i = 0, length = src.length(); i < length; i++) {
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int value = (src.get(i)) ? 1 : 0;
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out.value(value);
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}
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out.endArray();
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}
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}.nullSafe();
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public static final TypeAdapterFactory BIT_SET_FACTORY = newFactory(BitSet.class, BIT_SET);
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public static final TypeAdapter<Boolean> BOOLEAN = new TypeAdapter<Boolean>() {
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@Override
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public Boolean read(JsonReader in) throws IOException {
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JsonToken peek = in.peek();
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if (peek == JsonToken.NULL) {
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in.nextNull();
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return null;
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} else if (peek == JsonToken.STRING) {
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// support strings for compatibility with GSON 1.7
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return Boolean.parseBoolean(in.nextString());
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}
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return in.nextBoolean();
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}
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@Override
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public void write(JsonWriter out, Boolean value) throws IOException {
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out.value(value);
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}
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};
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/**
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* Writes a boolean as a string. Useful for map keys, where booleans aren't
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* otherwise permitted.
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*/
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public static final TypeAdapter<Boolean> BOOLEAN_AS_STRING = new TypeAdapter<Boolean>() {
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@Override public Boolean read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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return Boolean.valueOf(in.nextString());
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}
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@Override public void write(JsonWriter out, Boolean value) throws IOException {
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out.value(value == null ? "null" : value.toString());
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}
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};
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public static final TypeAdapterFactory BOOLEAN_FACTORY
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= newFactory(boolean.class, Boolean.class, BOOLEAN);
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public static final TypeAdapter<Number> BYTE = new TypeAdapter<Number>() {
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@Override
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public Number read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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int intValue;
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try {
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intValue = in.nextInt();
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} catch (NumberFormatException e) {
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throw new JsonSyntaxException(e);
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}
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// Allow up to 255 to support unsigned values
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if (intValue > 255 || intValue < Byte.MIN_VALUE) {
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throw new JsonSyntaxException("Lossy conversion from " + intValue + " to byte; at path " + in.getPreviousPath());
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}
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return (byte) intValue;
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}
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@Override
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public void write(JsonWriter out, Number value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapterFactory BYTE_FACTORY
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= newFactory(byte.class, Byte.class, BYTE);
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public static final TypeAdapter<Number> SHORT = new TypeAdapter<Number>() {
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@Override
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public Number read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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int intValue;
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try {
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intValue = in.nextInt();
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} catch (NumberFormatException e) {
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throw new JsonSyntaxException(e);
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}
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// Allow up to 65535 to support unsigned values
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if (intValue > 65535 || intValue < Short.MIN_VALUE) {
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throw new JsonSyntaxException("Lossy conversion from " + intValue + " to short; at path " + in.getPreviousPath());
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}
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return (short) intValue;
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}
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@Override
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public void write(JsonWriter out, Number value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapterFactory SHORT_FACTORY
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= newFactory(short.class, Short.class, SHORT);
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public static final TypeAdapter<Number> INTEGER = new TypeAdapter<Number>() {
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@Override
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public Number read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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try {
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return in.nextInt();
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} catch (NumberFormatException e) {
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throw new JsonSyntaxException(e);
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}
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}
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@Override
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public void write(JsonWriter out, Number value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapterFactory INTEGER_FACTORY
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= newFactory(int.class, Integer.class, INTEGER);
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public static final TypeAdapter<AtomicInteger> ATOMIC_INTEGER = new TypeAdapter<AtomicInteger>() {
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@Override public AtomicInteger read(JsonReader in) throws IOException {
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try {
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return new AtomicInteger(in.nextInt());
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} catch (NumberFormatException e) {
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throw new JsonSyntaxException(e);
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}
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}
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@Override public void write(JsonWriter out, AtomicInteger value) throws IOException {
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out.value(value.get());
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}
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}.nullSafe();
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public static final TypeAdapterFactory ATOMIC_INTEGER_FACTORY =
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newFactory(AtomicInteger.class, TypeAdapters.ATOMIC_INTEGER);
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public static final TypeAdapter<AtomicBoolean> ATOMIC_BOOLEAN = new TypeAdapter<AtomicBoolean>() {
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@Override public AtomicBoolean read(JsonReader in) throws IOException {
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return new AtomicBoolean(in.nextBoolean());
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}
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@Override public void write(JsonWriter out, AtomicBoolean value) throws IOException {
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out.value(value.get());
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}
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}.nullSafe();
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public static final TypeAdapterFactory ATOMIC_BOOLEAN_FACTORY =
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newFactory(AtomicBoolean.class, TypeAdapters.ATOMIC_BOOLEAN);
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public static final TypeAdapter<AtomicIntegerArray> ATOMIC_INTEGER_ARRAY = new TypeAdapter<AtomicIntegerArray>() {
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@Override public AtomicIntegerArray read(JsonReader in) throws IOException {
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List<Integer> list = new ArrayList<>();
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in.beginArray();
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while (in.hasNext()) {
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try {
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int integer = in.nextInt();
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list.add(integer);
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} catch (NumberFormatException e) {
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throw new JsonSyntaxException(e);
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}
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}
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in.endArray();
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int length = list.size();
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AtomicIntegerArray array = new AtomicIntegerArray(length);
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for (int i = 0; i < length; ++i) {
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array.set(i, list.get(i));
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}
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return array;
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}
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@Override public void write(JsonWriter out, AtomicIntegerArray value) throws IOException {
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out.beginArray();
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for (int i = 0, length = value.length(); i < length; i++) {
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out.value(value.get(i));
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}
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out.endArray();
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}
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}.nullSafe();
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public static final TypeAdapterFactory ATOMIC_INTEGER_ARRAY_FACTORY =
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newFactory(AtomicIntegerArray.class, TypeAdapters.ATOMIC_INTEGER_ARRAY);
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public static final TypeAdapter<Number> LONG = new TypeAdapter<Number>() {
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@Override
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public Number read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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try {
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return in.nextLong();
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} catch (NumberFormatException e) {
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throw new JsonSyntaxException(e);
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}
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}
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@Override
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public void write(JsonWriter out, Number value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapter<Number> FLOAT = new TypeAdapter<Number>() {
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@Override
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public Number read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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return (float) in.nextDouble();
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}
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@Override
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public void write(JsonWriter out, Number value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapter<Number> DOUBLE = new TypeAdapter<Number>() {
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@Override
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public Number read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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return in.nextDouble();
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}
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@Override
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public void write(JsonWriter out, Number value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapter<Character> CHARACTER = new TypeAdapter<Character>() {
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@Override
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public Character read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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String str = in.nextString();
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if (str.length() != 1) {
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throw new JsonSyntaxException("Expecting character, got: " + str + "; at " + in.getPreviousPath());
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}
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return str.charAt(0);
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}
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@Override
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public void write(JsonWriter out, Character value) throws IOException {
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out.value(value == null ? null : String.valueOf(value));
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}
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};
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public static final TypeAdapterFactory CHARACTER_FACTORY
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= newFactory(char.class, Character.class, CHARACTER);
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public static final TypeAdapter<String> STRING = new TypeAdapter<String>() {
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@Override
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public String read(JsonReader in) throws IOException {
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JsonToken peek = in.peek();
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if (peek == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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/* coerce booleans to strings for backwards compatibility */
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if (peek == JsonToken.BOOLEAN) {
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return Boolean.toString(in.nextBoolean());
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}
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return in.nextString();
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}
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@Override
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public void write(JsonWriter out, String value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapter<BigDecimal> BIG_DECIMAL = new TypeAdapter<BigDecimal>() {
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@Override public BigDecimal read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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String s = in.nextString();
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try {
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return new BigDecimal(s);
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} catch (NumberFormatException e) {
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throw new JsonSyntaxException("Failed parsing '" + s + "' as BigDecimal; at path " + in.getPreviousPath(), e);
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}
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}
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@Override public void write(JsonWriter out, BigDecimal value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapter<BigInteger> BIG_INTEGER = new TypeAdapter<BigInteger>() {
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@Override public BigInteger read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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String s = in.nextString();
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try {
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return new BigInteger(s);
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} catch (NumberFormatException e) {
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throw new JsonSyntaxException("Failed parsing '" + s + "' as BigInteger; at path " + in.getPreviousPath(), e);
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}
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}
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@Override public void write(JsonWriter out, BigInteger value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapter<LazilyParsedNumber> LAZILY_PARSED_NUMBER = new TypeAdapter<LazilyParsedNumber>() {
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// Normally users should not be able to access and deserialize LazilyParsedNumber because
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// it is an internal type, but implement this nonetheless in case there are legit corner
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// cases where this is possible
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@Override public LazilyParsedNumber read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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return new LazilyParsedNumber(in.nextString());
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}
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@Override public void write(JsonWriter out, LazilyParsedNumber value) throws IOException {
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out.value(value);
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}
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};
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public static final TypeAdapterFactory STRING_FACTORY = newFactory(String.class, STRING);
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public static final TypeAdapter<StringBuilder> STRING_BUILDER = new TypeAdapter<StringBuilder>() {
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@Override
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public StringBuilder read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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return new StringBuilder(in.nextString());
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}
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@Override
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public void write(JsonWriter out, StringBuilder value) throws IOException {
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out.value(value == null ? null : value.toString());
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}
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};
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public static final TypeAdapterFactory STRING_BUILDER_FACTORY =
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newFactory(StringBuilder.class, STRING_BUILDER);
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public static final TypeAdapter<StringBuffer> STRING_BUFFER = new TypeAdapter<StringBuffer>() {
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@Override
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public StringBuffer read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
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in.nextNull();
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return null;
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}
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return new StringBuffer(in.nextString());
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}
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@Override
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public void write(JsonWriter out, StringBuffer value) throws IOException {
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out.value(value == null ? null : value.toString());
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}
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};
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public static final TypeAdapterFactory STRING_BUFFER_FACTORY =
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newFactory(StringBuffer.class, STRING_BUFFER);
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public static final TypeAdapter<URL> URL = new TypeAdapter<URL>() {
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@Override
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public URL read(JsonReader in) throws IOException {
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if (in.peek() == JsonToken.NULL) {
|
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in.nextNull();
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return null;
|
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}
|
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String nextString = in.nextString();
|
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return "null".equals(nextString) ? null : new URL(nextString);
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}
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@Override
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public void write(JsonWriter out, URL value) throws IOException {
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out.value(value == null ? null : value.toExternalForm());
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}
|
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};
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|
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public static final TypeAdapterFactory URL_FACTORY = newFactory(URL.class, URL);
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|
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public static final TypeAdapter<URI> URI = new TypeAdapter<URI>() {
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@Override
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public URI read(JsonReader in) throws IOException {
|
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if (in.peek() == JsonToken.NULL) {
|
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in.nextNull();
|
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return null;
|
|
}
|
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try {
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String nextString = in.nextString();
|
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return "null".equals(nextString) ? null : new URI(nextString);
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} catch (URISyntaxException e) {
|
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throw new JsonIOException(e);
|
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}
|
|
}
|
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@Override
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public void write(JsonWriter out, URI value) throws IOException {
|
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out.value(value == null ? null : value.toASCIIString());
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}
|
|
};
|
|
|
|
public static final TypeAdapterFactory URI_FACTORY = newFactory(URI.class, URI);
|
|
|
|
public static final TypeAdapter<InetAddress> INET_ADDRESS = new TypeAdapter<InetAddress>() {
|
|
@Override
|
|
public InetAddress read(JsonReader in) throws IOException {
|
|
if (in.peek() == JsonToken.NULL) {
|
|
in.nextNull();
|
|
return null;
|
|
}
|
|
// regrettably, this should have included both the host name and the host address
|
|
return InetAddress.getByName(in.nextString());
|
|
}
|
|
@Override
|
|
public void write(JsonWriter out, InetAddress value) throws IOException {
|
|
out.value(value == null ? null : value.getHostAddress());
|
|
}
|
|
};
|
|
|
|
public static final TypeAdapterFactory INET_ADDRESS_FACTORY =
|
|
newTypeHierarchyFactory(InetAddress.class, INET_ADDRESS);
|
|
|
|
public static final TypeAdapter<UUID> UUID = new TypeAdapter<UUID>() {
|
|
@Override
|
|
public UUID read(JsonReader in) throws IOException {
|
|
if (in.peek() == JsonToken.NULL) {
|
|
in.nextNull();
|
|
return null;
|
|
}
|
|
String s = in.nextString();
|
|
try {
|
|
return java.util.UUID.fromString(s);
|
|
} catch (IllegalArgumentException e) {
|
|
throw new JsonSyntaxException("Failed parsing '" + s + "' as UUID; at path " + in.getPreviousPath(), e);
|
|
}
|
|
}
|
|
@Override
|
|
public void write(JsonWriter out, UUID value) throws IOException {
|
|
out.value(value == null ? null : value.toString());
|
|
}
|
|
};
|
|
|
|
public static final TypeAdapterFactory UUID_FACTORY = newFactory(UUID.class, UUID);
|
|
|
|
public static final TypeAdapter<Currency> CURRENCY = new TypeAdapter<Currency>() {
|
|
@Override
|
|
public Currency read(JsonReader in) throws IOException {
|
|
String s = in.nextString();
|
|
try {
|
|
return Currency.getInstance(s);
|
|
} catch (IllegalArgumentException e) {
|
|
throw new JsonSyntaxException("Failed parsing '" + s + "' as Currency; at path " + in.getPreviousPath(), e);
|
|
}
|
|
}
|
|
@Override
|
|
public void write(JsonWriter out, Currency value) throws IOException {
|
|
out.value(value.getCurrencyCode());
|
|
}
|
|
}.nullSafe();
|
|
public static final TypeAdapterFactory CURRENCY_FACTORY = newFactory(Currency.class, CURRENCY);
|
|
|
|
public static final TypeAdapter<Calendar> CALENDAR = new TypeAdapter<Calendar>() {
|
|
private static final String YEAR = "year";
|
|
private static final String MONTH = "month";
|
|
private static final String DAY_OF_MONTH = "dayOfMonth";
|
|
private static final String HOUR_OF_DAY = "hourOfDay";
|
|
private static final String MINUTE = "minute";
|
|
private static final String SECOND = "second";
|
|
|
|
@Override
|
|
public Calendar read(JsonReader in) throws IOException {
|
|
if (in.peek() == JsonToken.NULL) {
|
|
in.nextNull();
|
|
return null;
|
|
}
|
|
in.beginObject();
|
|
int year = 0;
|
|
int month = 0;
|
|
int dayOfMonth = 0;
|
|
int hourOfDay = 0;
|
|
int minute = 0;
|
|
int second = 0;
|
|
while (in.peek() != JsonToken.END_OBJECT) {
|
|
String name = in.nextName();
|
|
int value = in.nextInt();
|
|
if (YEAR.equals(name)) {
|
|
year = value;
|
|
} else if (MONTH.equals(name)) {
|
|
month = value;
|
|
} else if (DAY_OF_MONTH.equals(name)) {
|
|
dayOfMonth = value;
|
|
} else if (HOUR_OF_DAY.equals(name)) {
|
|
hourOfDay = value;
|
|
} else if (MINUTE.equals(name)) {
|
|
minute = value;
|
|
} else if (SECOND.equals(name)) {
|
|
second = value;
|
|
}
|
|
}
|
|
in.endObject();
|
|
return new GregorianCalendar(year, month, dayOfMonth, hourOfDay, minute, second);
|
|
}
|
|
|
|
@Override
|
|
public void write(JsonWriter out, Calendar value) throws IOException {
|
|
if (value == null) {
|
|
out.nullValue();
|
|
return;
|
|
}
|
|
out.beginObject();
|
|
out.name(YEAR);
|
|
out.value(value.get(Calendar.YEAR));
|
|
out.name(MONTH);
|
|
out.value(value.get(Calendar.MONTH));
|
|
out.name(DAY_OF_MONTH);
|
|
out.value(value.get(Calendar.DAY_OF_MONTH));
|
|
out.name(HOUR_OF_DAY);
|
|
out.value(value.get(Calendar.HOUR_OF_DAY));
|
|
out.name(MINUTE);
|
|
out.value(value.get(Calendar.MINUTE));
|
|
out.name(SECOND);
|
|
out.value(value.get(Calendar.SECOND));
|
|
out.endObject();
|
|
}
|
|
};
|
|
|
|
public static final TypeAdapterFactory CALENDAR_FACTORY =
|
|
newFactoryForMultipleTypes(Calendar.class, GregorianCalendar.class, CALENDAR);
|
|
|
|
public static final TypeAdapter<Locale> LOCALE = new TypeAdapter<Locale>() {
|
|
@Override
|
|
public Locale read(JsonReader in) throws IOException {
|
|
if (in.peek() == JsonToken.NULL) {
|
|
in.nextNull();
|
|
return null;
|
|
}
|
|
String locale = in.nextString();
|
|
StringTokenizer tokenizer = new StringTokenizer(locale, "_");
|
|
String language = null;
|
|
String country = null;
|
|
String variant = null;
|
|
if (tokenizer.hasMoreElements()) {
|
|
language = tokenizer.nextToken();
|
|
}
|
|
if (tokenizer.hasMoreElements()) {
|
|
country = tokenizer.nextToken();
|
|
}
|
|
if (tokenizer.hasMoreElements()) {
|
|
variant = tokenizer.nextToken();
|
|
}
|
|
if (country == null && variant == null) {
|
|
return new Locale(language);
|
|
} else if (variant == null) {
|
|
return new Locale(language, country);
|
|
} else {
|
|
return new Locale(language, country, variant);
|
|
}
|
|
}
|
|
@Override
|
|
public void write(JsonWriter out, Locale value) throws IOException {
|
|
out.value(value == null ? null : value.toString());
|
|
}
|
|
};
|
|
|
|
public static final TypeAdapterFactory LOCALE_FACTORY = newFactory(Locale.class, LOCALE);
|
|
|
|
public static final TypeAdapter<JsonElement> JSON_ELEMENT = new TypeAdapter<JsonElement>() {
|
|
@Override public JsonElement read(JsonReader in) throws IOException {
|
|
if (in instanceof JsonTreeReader) {
|
|
return ((JsonTreeReader) in).nextJsonElement();
|
|
}
|
|
|
|
switch (in.peek()) {
|
|
case STRING:
|
|
return new JsonPrimitive(in.nextString());
|
|
case NUMBER:
|
|
String number = in.nextString();
|
|
return new JsonPrimitive(new LazilyParsedNumber(number));
|
|
case BOOLEAN:
|
|
return new JsonPrimitive(in.nextBoolean());
|
|
case NULL:
|
|
in.nextNull();
|
|
return JsonNull.INSTANCE;
|
|
case BEGIN_ARRAY:
|
|
JsonArray array = new JsonArray();
|
|
in.beginArray();
|
|
while (in.hasNext()) {
|
|
array.add(read(in));
|
|
}
|
|
in.endArray();
|
|
return array;
|
|
case BEGIN_OBJECT:
|
|
JsonObject object = new JsonObject();
|
|
in.beginObject();
|
|
while (in.hasNext()) {
|
|
object.add(in.nextName(), read(in));
|
|
}
|
|
in.endObject();
|
|
return object;
|
|
case END_DOCUMENT:
|
|
case NAME:
|
|
case END_OBJECT:
|
|
case END_ARRAY:
|
|
default:
|
|
throw new IllegalArgumentException();
|
|
}
|
|
}
|
|
|
|
@Override public void write(JsonWriter out, JsonElement value) throws IOException {
|
|
if (value == null || value.isJsonNull()) {
|
|
out.nullValue();
|
|
} else if (value.isJsonPrimitive()) {
|
|
JsonPrimitive primitive = value.getAsJsonPrimitive();
|
|
if (primitive.isNumber()) {
|
|
out.value(primitive.getAsNumber());
|
|
} else if (primitive.isBoolean()) {
|
|
out.value(primitive.getAsBoolean());
|
|
} else {
|
|
out.value(primitive.getAsString());
|
|
}
|
|
|
|
} else if (value.isJsonArray()) {
|
|
out.beginArray();
|
|
for (JsonElement e : value.getAsJsonArray()) {
|
|
write(out, e);
|
|
}
|
|
out.endArray();
|
|
|
|
} else if (value.isJsonObject()) {
|
|
out.beginObject();
|
|
for (Map.Entry<String, JsonElement> e : value.getAsJsonObject().entrySet()) {
|
|
out.name(e.getKey());
|
|
write(out, e.getValue());
|
|
}
|
|
out.endObject();
|
|
|
|
} else {
|
|
throw new IllegalArgumentException("Couldn't write " + value.getClass());
|
|
}
|
|
}
|
|
};
|
|
|
|
public static final TypeAdapterFactory JSON_ELEMENT_FACTORY
|
|
= newTypeHierarchyFactory(JsonElement.class, JSON_ELEMENT);
|
|
|
|
private static final class EnumTypeAdapter<T extends Enum<T>> extends TypeAdapter<T> {
|
|
private final Map<String, T> nameToConstant = new HashMap<>();
|
|
private final Map<String, T> stringToConstant = new HashMap<>();
|
|
private final Map<T, String> constantToName = new HashMap<>();
|
|
|
|
public EnumTypeAdapter(final Class<T> classOfT) {
|
|
try {
|
|
// Uses reflection to find enum constants to work around name mismatches for obfuscated classes
|
|
// Reflection access might throw SecurityException, therefore run this in privileged context;
|
|
// should be acceptable because this only retrieves enum constants, but does not expose anything else
|
|
Field[] constantFields = AccessController.doPrivileged(new PrivilegedAction<Field[]>() {
|
|
@Override public Field[] run() {
|
|
Field[] fields = classOfT.getDeclaredFields();
|
|
ArrayList<Field> constantFieldsList = new ArrayList<>(fields.length);
|
|
for (Field f : fields) {
|
|
if (f.isEnumConstant()) {
|
|
constantFieldsList.add(f);
|
|
}
|
|
}
|
|
|
|
Field[] constantFields = constantFieldsList.toArray(new Field[0]);
|
|
AccessibleObject.setAccessible(constantFields, true);
|
|
return constantFields;
|
|
}
|
|
});
|
|
for (Field constantField : constantFields) {
|
|
@SuppressWarnings("unchecked")
|
|
T constant = (T)(constantField.get(null));
|
|
String name = constant.name();
|
|
String toStringVal = constant.toString();
|
|
|
|
SerializedName annotation = constantField.getAnnotation(SerializedName.class);
|
|
if (annotation != null) {
|
|
name = annotation.value();
|
|
for (String alternate : annotation.alternate()) {
|
|
nameToConstant.put(alternate, constant);
|
|
}
|
|
}
|
|
nameToConstant.put(name, constant);
|
|
stringToConstant.put(toStringVal, constant);
|
|
constantToName.put(constant, name);
|
|
}
|
|
} catch (IllegalAccessException e) {
|
|
throw new AssertionError(e);
|
|
}
|
|
}
|
|
@Override public T read(JsonReader in) throws IOException {
|
|
if (in.peek() == JsonToken.NULL) {
|
|
in.nextNull();
|
|
return null;
|
|
}
|
|
String key = in.nextString();
|
|
T constant = nameToConstant.get(key);
|
|
return (constant == null) ? stringToConstant.get(key) : constant;
|
|
}
|
|
|
|
@Override public void write(JsonWriter out, T value) throws IOException {
|
|
out.value(value == null ? null : constantToName.get(value));
|
|
}
|
|
}
|
|
|
|
public static final TypeAdapterFactory ENUM_FACTORY = new TypeAdapterFactory() {
|
|
@SuppressWarnings({"rawtypes", "unchecked"})
|
|
@Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
|
|
Class<? super T> rawType = typeToken.getRawType();
|
|
if (!Enum.class.isAssignableFrom(rawType) || rawType == Enum.class) {
|
|
return null;
|
|
}
|
|
if (!rawType.isEnum()) {
|
|
rawType = rawType.getSuperclass(); // handle anonymous subclasses
|
|
}
|
|
return (TypeAdapter<T>) new EnumTypeAdapter(rawType);
|
|
}
|
|
};
|
|
|
|
public static <TT> TypeAdapterFactory newFactory(
|
|
final TypeToken<TT> type, final TypeAdapter<TT> typeAdapter) {
|
|
return new TypeAdapterFactory() {
|
|
@SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal
|
|
@Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
|
|
return typeToken.equals(type) ? (TypeAdapter<T>) typeAdapter : null;
|
|
}
|
|
};
|
|
}
|
|
|
|
public static <TT> TypeAdapterFactory newFactory(
|
|
final Class<TT> type, final TypeAdapter<TT> typeAdapter) {
|
|
return new TypeAdapterFactory() {
|
|
@SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal
|
|
@Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
|
|
return typeToken.getRawType() == type ? (TypeAdapter<T>) typeAdapter : null;
|
|
}
|
|
@Override public String toString() {
|
|
return "Factory[type=" + type.getName() + ",adapter=" + typeAdapter + "]";
|
|
}
|
|
};
|
|
}
|
|
|
|
public static <TT> TypeAdapterFactory newFactory(
|
|
final Class<TT> unboxed, final Class<TT> boxed, final TypeAdapter<? super TT> typeAdapter) {
|
|
return new TypeAdapterFactory() {
|
|
@SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal
|
|
@Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
|
|
Class<? super T> rawType = typeToken.getRawType();
|
|
return (rawType == unboxed || rawType == boxed) ? (TypeAdapter<T>) typeAdapter : null;
|
|
}
|
|
@Override public String toString() {
|
|
return "Factory[type=" + boxed.getName()
|
|
+ "+" + unboxed.getName() + ",adapter=" + typeAdapter + "]";
|
|
}
|
|
};
|
|
}
|
|
|
|
public static <TT> TypeAdapterFactory newFactoryForMultipleTypes(final Class<TT> base,
|
|
final Class<? extends TT> sub, final TypeAdapter<? super TT> typeAdapter) {
|
|
return new TypeAdapterFactory() {
|
|
@SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal
|
|
@Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
|
|
Class<? super T> rawType = typeToken.getRawType();
|
|
return (rawType == base || rawType == sub) ? (TypeAdapter<T>) typeAdapter : null;
|
|
}
|
|
@Override public String toString() {
|
|
return "Factory[type=" + base.getName()
|
|
+ "+" + sub.getName() + ",adapter=" + typeAdapter + "]";
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Returns a factory for all subtypes of {@code typeAdapter}. We do a runtime check to confirm
|
|
* that the deserialized type matches the type requested.
|
|
*/
|
|
public static <T1> TypeAdapterFactory newTypeHierarchyFactory(
|
|
final Class<T1> clazz, final TypeAdapter<T1> typeAdapter) {
|
|
return new TypeAdapterFactory() {
|
|
@SuppressWarnings("unchecked")
|
|
@Override public <T2> TypeAdapter<T2> create(Gson gson, TypeToken<T2> typeToken) {
|
|
final Class<? super T2> requestedType = typeToken.getRawType();
|
|
if (!clazz.isAssignableFrom(requestedType)) {
|
|
return null;
|
|
}
|
|
return (TypeAdapter<T2>) new TypeAdapter<T1>() {
|
|
@Override public void write(JsonWriter out, T1 value) throws IOException {
|
|
typeAdapter.write(out, value);
|
|
}
|
|
|
|
@Override public T1 read(JsonReader in) throws IOException {
|
|
T1 result = typeAdapter.read(in);
|
|
if (result != null && !requestedType.isInstance(result)) {
|
|
throw new JsonSyntaxException("Expected a " + requestedType.getName()
|
|
+ " but was " + result.getClass().getName() + "; at path " + in.getPreviousPath());
|
|
}
|
|
return result;
|
|
}
|
|
};
|
|
}
|
|
@Override public String toString() {
|
|
return "Factory[typeHierarchy=" + clazz.getName() + ",adapter=" + typeAdapter + "]";
|
|
}
|
|
};
|
|
}
|
|
}
|