JsonBuilder.java

/*
 * Copyright 2012 Igor Vaynberg
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with
 * the License. You may obtain a copy of the License in the LICENSE file, or 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.vaynberg.wicket.select2.json;

import org.json.JSONWriter;

/**
 * A JSONWriter that writes and allows access to the underlying {@link StringBuilder}. One of the advantages of this
 * class is that it can expose Json as a {@link CharSequence} instead of a {@link String} so no extra memory allocations
 * are necessary for code that can use a {@link CharSequence}.
 * 
 * @author igor
 * 
 */
public class JsonBuilder extends JSONWriter {

    /**
     * Constructs a builder with a new {@link StringBuilder}.
     */
    public JsonBuilder() {
	this(new StringBuilder());
    }

    /**
     * Constructs a builder with an existing {@link StringBuilder}.
     * 
     * @param builder
     */
    public JsonBuilder(StringBuilder builder) {
	super(new StringBuilderWriter(builder));
    }

    /**
     * @return underlying {@link StringBuilder} as a {@link CharSequence}.
     */
    public CharSequence toJson() {
	return ((StringBuilderWriter) writer).getBuilder();
    }

}