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Diffstat (limited to 'gson/src/test/java/com/google/gson/functional/TypeAdapterPrecedenceTest.java')
-rw-r--r-- | gson/src/test/java/com/google/gson/functional/TypeAdapterPrecedenceTest.java | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/gson/src/test/java/com/google/gson/functional/TypeAdapterPrecedenceTest.java b/gson/src/test/java/com/google/gson/functional/TypeAdapterPrecedenceTest.java new file mode 100644 index 00000000..2f13f664 --- /dev/null +++ b/gson/src/test/java/com/google/gson/functional/TypeAdapterPrecedenceTest.java @@ -0,0 +1,149 @@ +/* + * Copyright (C) 2011 Google Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.google.gson.functional; + +import com.google.gson.Gson; +import com.google.gson.GsonBuilder; +import com.google.gson.JsonDeserializationContext; +import com.google.gson.JsonDeserializer; +import com.google.gson.JsonElement; +import com.google.gson.JsonPrimitive; +import com.google.gson.JsonSerializationContext; +import com.google.gson.JsonSerializer; +import com.google.gson.TypeAdapter; +import com.google.gson.stream.JsonReader; +import com.google.gson.stream.JsonWriter; +import java.io.IOException; +import java.lang.reflect.Type; +import junit.framework.TestCase; + +public final class TypeAdapterPrecedenceTest extends TestCase { + public void testNonstreamingFollowedByNonstreaming() { + Gson gson = new GsonBuilder() + .registerTypeAdapter(Foo.class, newSerializer("serializer 1")) + .registerTypeAdapter(Foo.class, newSerializer("serializer 2")) + .registerTypeAdapter(Foo.class, newDeserializer("deserializer 1")) + .registerTypeAdapter(Foo.class, newDeserializer("deserializer 2")) + .create(); + assertEquals("\"foo via serializer 2\"", gson.toJson(new Foo("foo"))); + assertEquals("foo via deserializer 2", gson.fromJson("foo", Foo.class).name); + } + + public void testStreamingFollowedByStreaming() { + Gson gson = new GsonBuilder() + .registerTypeAdapter(Foo.class, newTypeAdapter("type adapter 1")) + .registerTypeAdapter(Foo.class, newTypeAdapter("type adapter 2")) + .create(); + assertEquals("\"foo via type adapter 2\"", gson.toJson(new Foo("foo"))); + assertEquals("foo via type adapter 2", gson.fromJson("foo", Foo.class).name); + } + + public void testSerializeNonstreamingTypeAdapterFollowedByStreamingTypeAdapter() { + Gson gson = new GsonBuilder() + .registerTypeAdapter(Foo.class, newSerializer("serializer")) + .registerTypeAdapter(Foo.class, newDeserializer("deserializer")) + .registerTypeAdapter(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); + } + + public void testStreamingFollowedByNonstreaming() { + Gson gson = new GsonBuilder() + .registerTypeAdapter(Foo.class, newTypeAdapter("type adapter")) + .registerTypeAdapter(Foo.class, newSerializer("serializer")) + .registerTypeAdapter(Foo.class, newDeserializer("deserializer")) + .create(); + assertEquals("\"foo via serializer\"", gson.toJson(new Foo("foo"))); + assertEquals("foo via deserializer", gson.fromJson("foo", Foo.class).name); + } + + public void testStreamingHierarchicalFollowedByNonstreaming() { + Gson gson = new GsonBuilder() + .registerTypeHierarchyAdapter(Foo.class, newTypeAdapter("type adapter")) + .registerTypeAdapter(Foo.class, newSerializer("serializer")) + .registerTypeAdapter(Foo.class, newDeserializer("deserializer")) + .create(); + assertEquals("\"foo via serializer\"", gson.toJson(new Foo("foo"))); + assertEquals("foo via deserializer", gson.fromJson("foo", Foo.class).name); + } + + public void testStreamingFollowedByNonstreamingHierarchical() { + Gson gson = new GsonBuilder() + .registerTypeAdapter(Foo.class, newTypeAdapter("type adapter")) + .registerTypeHierarchyAdapter(Foo.class, newSerializer("serializer")) + .registerTypeHierarchyAdapter(Foo.class, newDeserializer("deserializer")) + .create(); + 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); + } + + public void testNonstreamingHierarchicalFollowedByNonstreaming() { + Gson gson = new GsonBuilder() + .registerTypeHierarchyAdapter(Foo.class, newSerializer("hierarchical")) + .registerTypeHierarchyAdapter(Foo.class, newDeserializer("hierarchical")) + .registerTypeAdapter(Foo.class, newSerializer("non hierarchical")) + .registerTypeAdapter(Foo.class, newDeserializer("non hierarchical")) + .create(); + assertEquals("\"foo via non hierarchical\"", gson.toJson(new Foo("foo"))); + assertEquals("foo via non hierarchical", gson.fromJson("foo", Foo.class).name); + } + + private static class Foo { + final String name; + private Foo(String 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 in) throws IOException { + return new Foo(in.nextString() + " via " + name); + } + @Override public void write(JsonWriter out, Foo value) throws IOException { + out.value(value.name + " via " + name); + } + }; + } +} |