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Test precedence of type hierarchy adapters.

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This commit is contained in:
Jesse Wilson 2011-11-23 05:13:17 +00:00
parent d1de4cf676
commit 3cbe355cb6
1 changed files with 61 additions and 39 deletions
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100
gson/src/test/java/com/google/gson/functional/TypeAdapterPrecedenceTest.java
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@ -21,7 +21,6 @@ import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext; import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer; import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement; import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive; import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext; import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer; import com.google.gson.JsonSerializer;
@ -33,64 +32,87 @@ import java.lang.reflect.Type;
import junit.framework.TestCase; import junit.framework.TestCase;
public final class TypeAdapterPrecedenceTest extends TestCase { public final class TypeAdapterPrecedenceTest extends TestCase {
private static final JsonSerializer<Foo> FOO_SERIALIZER = new JsonSerializer<Foo>() {
public JsonElement serialize(Foo src, Type typeOfSrc, JsonSerializationContext context) {
return new JsonPrimitive(src.name + " (via FOO_SERIALIZER)");
}
};
private static final JsonDeserializer<Foo> FOO_DESERIALIZER = new JsonDeserializer<Foo>() {
public Foo deserialize(JsonElement json, Type typeOfT,
JsonDeserializationContext context) throws JsonParseException {
return new Foo(json.getAsString() + " (via FOO_DESERIALIZER)");
}
};
private static final TypeAdapter<Foo> FOO_TYPE_ADAPTER = new TypeAdapter<Foo>() {
@Override public Foo read(JsonReader reader) throws IOException {
return new Foo(reader.nextString() + " (via FOO_TYPE_ADAPTER)");
}
@Override public void write(JsonWriter writer, Foo value) throws IOException {
writer.value(value.name + " (via FOO_TYPE_ADAPTER)");
}
};
public void testSerializeNonstreamingTypeAdapterFollowedByStreamingTypeAdapter() { public void testSerializeNonstreamingTypeAdapterFollowedByStreamingTypeAdapter() {
Gson gson = new GsonBuilder() Gson gson = new GsonBuilder()
.registerTypeAdapter(Foo.class, FOO_SERIALIZER) .registerTypeAdapter(Foo.class, newSerializer("serializer"))
.registerTypeAdapter(Foo.class, FOO_TYPE_ADAPTER) .registerTypeAdapter(Foo.class, newDeserializer("deserializer"))
.registerTypeAdapter(Foo.class, newTypeAdapter("type adapter"))
.create(); .create();
assertEquals("\"foo (via FOO_SERIALIZER)\"", gson.toJson(new Foo("foo"))); assertEquals("\"foo via serializer\"", gson.toJson(new Foo("foo")));
assertEquals("foo via deserializer", gson.fromJson("foo", Foo.class).name);
} }
public void testSerializeStreamingTypeAdapterFollowedByNonstreamingTypeAdapter() { public void testStreamingFollowedByNonstreaming() {
Gson gson = new GsonBuilder() Gson gson = new GsonBuilder()
.registerTypeAdapter(Foo.class, FOO_TYPE_ADAPTER) .registerTypeAdapter(Foo.class, newTypeAdapter("type adapter"))
.registerTypeAdapter(Foo.class, FOO_SERIALIZER) .registerTypeAdapter(Foo.class, newSerializer("serializer"))
.registerTypeAdapter(Foo.class, newDeserializer("deserializer"))
.create(); .create();
assertEquals("\"foo (via FOO_TYPE_ADAPTER)\"", gson.toJson(new Foo("foo"))); assertEquals("\"foo via type adapter\"", gson.toJson(new Foo("foo")));
assertEquals("foo via type adapter", gson.fromJson("foo", Foo.class).name);
} }
public void testDeserializeNonstreamingTypeAdapterFollowedByStreamingTypeAdapter() { public void testStreamingHierarchicalFollowedByNonstreaming() {
Gson gson = new GsonBuilder() Gson gson = new GsonBuilder()
.registerTypeAdapter(Foo.class, FOO_DESERIALIZER) .registerTypeHierarchyAdapter(Foo.class, newTypeAdapter("type adapter"))
.registerTypeAdapter(Foo.class, FOO_TYPE_ADAPTER) .registerTypeAdapter(Foo.class, newSerializer("serializer"))
.registerTypeAdapter(Foo.class, newDeserializer("deserializer"))
.create(); .create();
assertEquals("foo (via FOO_DESERIALIZER)", gson.fromJson("foo", Foo.class).name); assertEquals("\"foo via type adapter\"", gson.toJson(new Foo("foo")));
assertEquals("foo via type adapter", gson.fromJson("foo", Foo.class).name);
} }
public void testDeserializeStreamingTypeAdapterFollowedByNonstreamingTypeAdapter() { public void testStreamingFollowedByNonstreamingHierarchical() {
Gson gson = new GsonBuilder() Gson gson = new GsonBuilder()
.registerTypeAdapter(Foo.class, FOO_TYPE_ADAPTER) .registerTypeAdapter(Foo.class, newTypeAdapter("type adapter"))
.registerTypeAdapter(Foo.class, FOO_DESERIALIZER) .registerTypeHierarchyAdapter(Foo.class, newSerializer("serializer"))
.registerTypeHierarchyAdapter(Foo.class, newDeserializer("deserializer"))
.create(); .create();
assertEquals("foo (via FOO_TYPE_ADAPTER)", gson.fromJson("foo", Foo.class).name); assertEquals("\"foo via type adapter\"", gson.toJson(new Foo("foo")));
assertEquals("foo via type adapter", gson.fromJson("foo", Foo.class).name);
}
public void testStreamingHierarchicalFollowedByNonstreamingHierarchical() {
Gson gson = new GsonBuilder()
.registerTypeHierarchyAdapter(Foo.class, newSerializer("serializer"))
.registerTypeHierarchyAdapter(Foo.class, newDeserializer("deserializer"))
.registerTypeHierarchyAdapter(Foo.class, newTypeAdapter("type adapter"))
.create();
assertEquals("\"foo via type adapter\"", gson.toJson(new Foo("foo")));
assertEquals("foo via type adapter", gson.fromJson("foo", Foo.class).name);
} }
private static class Foo { private static class Foo {
private final String name; final String name;
private Foo(String name) { private Foo(String name) {
this.name = name; this.name = name;
} }
} }
private JsonSerializer<Foo> newSerializer(final String name) {
return new JsonSerializer<Foo>() {
public JsonElement serialize(Foo src, Type typeOfSrc, JsonSerializationContext context) {
return new JsonPrimitive(src.name + " via " + name);
}
};
}
private JsonDeserializer<Foo> newDeserializer(final String name) {
return new JsonDeserializer<Foo>() {
public Foo deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) {
return new Foo(json.getAsString() + " via " + name);
}
};
}
private TypeAdapter<Foo> newTypeAdapter(final String name) {
return new TypeAdapter<Foo>() {
@Override public Foo read(JsonReader reader) throws IOException {
return new Foo(reader.nextString() + " via " + name);
}
@Override public void write(JsonWriter writer, Foo value) throws IOException {
writer.value(value.name + " via " + name);
}
};
}
} }