Added an illustrative comment in the ParamMap precondition check. Added methods to take a formatted message in Preconditions.
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@ -72,7 +72,8 @@ class ParamMap {
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@SuppressWarnings("unchecked")
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@SuppressWarnings("unchecked")
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public <T> T get(String key, Type typeOfValue) {
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public <T> T get(String key, Type typeOfValue) {
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Preconditions.checkArgument(spec.checkIfCompatible(key, typeOfValue));
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Preconditions.checkArgument(spec.checkIfCompatible(key, typeOfValue),
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"Incompatible key %s for type %s", key, typeOfValue);
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return (T) contents.get(key);
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return (T) contents.get(key);
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}
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}
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@ -23,9 +23,21 @@ final class Preconditions {
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}
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}
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}
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}
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public static void checkArgument(boolean condition, String msg, Object... msgArgs) {
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if (!condition) {
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throw new IllegalArgumentException(String.format(msg, msgArgs));
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}
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}
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public static void checkNotNull(Object obj) {
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public static void checkNotNull(Object obj) {
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if (obj == null) {
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if (obj == null) {
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throw new IllegalArgumentException();
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throw new IllegalArgumentException();
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}
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}
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}
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}
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public static void checkNotNull(Object obj, String msg, Object... msgArgs) {
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if (obj == null) {
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throw new IllegalArgumentException(String.format(msg, msgArgs));
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}
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}
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}
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}
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