rocket.json.client.StringJsonSerializer.java Source code

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Here is the source code for rocket.json.client.StringJsonSerializer.java

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/*
 * Copyright Miroslav Pokorny
 *
 * 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 rocket.json.client;

import com.google.gwt.json.client.JSONNull;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;

/**
 * Reads and writes String values.
 * 
 * @author Miroslav Pokorny
 */
public class StringJsonSerializer extends JsonSerializer {
    public final static StringJsonSerializer serializer = new StringJsonSerializer();

    private StringJsonSerializer() {
        super();
    }

    @Override
    public Object readObject(final JSONValue jsonValue) {
        return this.read(jsonValue);
    }

    @Override
    public JSONValue writeJson(final Object instance) {
        return instance == null ? (JSONValue) JSONNull.getInstance()
                : (JSONValue) new JSONString((String) instance);
    }

    public String read(final JSONValue jsonValue) {
        String value = null;

        while (true) {
            if (null == jsonValue) {
                break;
            }
            final JSONString jsonString = jsonValue.isString();
            if (null == jsonString) {
                break;
            }

            value = jsonString.stringValue();
            break;
        }

        return value;
    }
}