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/*
* Copyright (C) 2012 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;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;
import java.io.IOException;
import java.util.Locale;
import junit.framework.TestCase;
/**
* @author Jesse Wilson
*/
public class OverrideCoreTypeAdaptersTest extends TestCase {
private static final TypeAdapter<Boolean> booleanAsIntAdapter = new TypeAdapter<Boolean>() {
@Override public void write(JsonWriter out, Boolean value) throws IOException {
out.value(value ? 1 : 0);
}
@Override public Boolean read(JsonReader in) throws IOException {
int value = in.nextInt();
return value != 0;
}
};
private static final TypeAdapter<String> swapCaseStringAdapter = new TypeAdapter<String>() {
@Override public void write(JsonWriter out, String value) throws IOException {
out.value(value.toUpperCase(Locale.US));
}
@Override public String read(JsonReader in) throws IOException {
return in.nextString().toLowerCase(Locale.US);
}
};
public void testOverrideWrapperBooleanAdapter() {
Gson gson = new GsonBuilder()
.registerTypeAdapter(Boolean.class, booleanAsIntAdapter)
.create();
assertEquals("true", gson.toJson(true, boolean.class));
assertEquals("1", gson.toJson(true, Boolean.class));
assertEquals(Boolean.TRUE, gson.fromJson("true", boolean.class));
assertEquals(Boolean.TRUE, gson.fromJson("1", Boolean.class));
assertEquals(Boolean.FALSE, gson.fromJson("0", Boolean.class));
}
public void testOverridePrimitiveBooleanAdapter() {
Gson gson = new GsonBuilder()
.registerTypeAdapter(boolean.class, booleanAsIntAdapter)
.create();
assertEquals("1", gson.toJson(true, boolean.class));
assertEquals("true", gson.toJson(true, Boolean.class));
assertEquals(Boolean.TRUE, gson.fromJson("1", boolean.class));
assertEquals(Boolean.TRUE, gson.fromJson("true", Boolean.class));
assertEquals("0", gson.toJson(false, boolean.class));
}
public void testOverrideStringAdapter() {
Gson gson = new GsonBuilder()
.registerTypeAdapter(String.class, swapCaseStringAdapter)
.create();
assertEquals("\"HELLO\"", gson.toJson("Hello", String.class));
assertEquals("hello", gson.fromJson("\"Hello\"", String.class));
}
}
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