/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.wicket.ajax.json;

import org.apache.wicket.util.io.IClusterable;
import org.apache.wicket.util.lang.Args;

/**
 * Represents a Json function. When written out these values are not escaped so its possible to write out raw
 * JavaScript.
 */
public class JSONFunction implements JSONString, CharSequence, IClusterable
{
	private static final long serialVersionUID = 1L;
	private final CharSequence value;

	/**
	 * Function to be used to output the json value without quotes
	 * @param value the value
	 */
	public JSONFunction(CharSequence value)
	{
		this.value = Args.notNull(value, "value");
	}

	@Override
	public String toString()
	{
		return toJSONString();
	}

	@Override
	public String toJSONString()
	{
		return value.toString();
	}

	@Override
	public int length()
	{
		return value.length();
	}

	@Override
	public char charAt(int index)
	{
		return value.charAt(index);
	}

	@Override
	public CharSequence subSequence(int start, int end)
	{
		return value.subSequence(start, end);
	}
}