com.getperka.flatpack.codexes.BooleanCodex.java Source code

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Here is the source code for com.getperka.flatpack.codexes.BooleanCodex.java

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/*
 * #%L
 * FlatPack serialization code
 * %%
 * Copyright (C) 2012 Perka 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.
 * #L%
 */
package com.getperka.flatpack.codexes;

import java.io.IOException;

import com.getperka.flatpack.ext.DeserializationContext;
import com.getperka.flatpack.ext.JsonKind;
import com.getperka.flatpack.ext.SerializationContext;
import com.getperka.flatpack.ext.Type;
import com.google.gson.JsonElement;

/**
 * Support for boolean values.
 */
public class BooleanCodex extends ValueCodex<Boolean> {

    protected BooleanCodex() {
    }

    @Override
    public Type describe() {
        return new Type.Builder().withJsonKind(JsonKind.BOOLEAN).build();
    }

    /**
     * Returns {@code true} for {@code null} or {@link Boolean#FALSE} values.
     */
    @Override
    public boolean isDefaultValue(Boolean value) {
        return value == null || Boolean.FALSE.equals(value);
    }

    @Override
    public Boolean readNotNull(JsonElement element, DeserializationContext context) {
        return element.getAsJsonPrimitive().isNumber() ? element.getAsNumber().intValue() != 0
                : element.getAsBoolean();
    }

    @Override
    public void writeNotNull(Boolean object, SerializationContext context) throws IOException {
        context.getWriter().value(object);
    }
}