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JSON Parser library.
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/*--------------------------------------------------------------------------
 *  Copyright 2007 Taro L. Saito
 *
 *  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.
 *--------------------------------------------------------------------------*/
//--------------------------------------
// XerialJ Project
//
// JSONValueBase.java
// Since: Apr 4, 2007
//
// $URL: http://dev.utgenome.org/svn/utgb/trunk/common/src/org/utgenome/json/JSONValueBase.java $ 
// $Author: leo $
//--------------------------------------
package org.xerial.json;

import java.util.Collection;
import java.util.Iterator;

/**
 * Base implementation of the JSONValue
 * 
 * @author leo
 * 
 */
public abstract class JSONValueBase implements JSONValue {

    public JSONArray getJSONArray() {
        return null;
    }

    public JSONBoolean getJSONBoolean() {
        return null;
    }

    public JSONNull getJSONNull() {
        return null;
    }

    public JSONNumber getJSONNumber() {
        return null;
    }

    public JSONObject getJSONObject() {
        return null;
    }

    public JSONString getJSONString() {
        return null;
    }

    public JSONValue translateAsJSONValue(Object value) throws JSONException {
        return JSONUtil.toJSONValue(value);
    }

    public String toJSONString() {
        return this.toString();
    }

    /**
     * Concatenates all elements in the given collection c into a single string
     * with the separator
     * 
     * @param c
     *            collection of elements to concatenate
     * @param concatinator
     *            string for concatenating elements: e.g., ", ", "." etc.
     * @return a concatenated string
     */
    protected static String join(Collection< ? > c, String concatinator) {
        if (c == null)
            return "";
        int size = c.size();
        if (size == 0)
            return "";

        Iterator< ? > it = c.iterator();
        StringBuilder buf = new StringBuilder();
        for (int i = 0; it.hasNext() && i < size - 1; i++) {
            Object data = it.next();
            buf.append(data.toString());
            buf.append(concatinator);
        }
        Object lastData = it.next();
        buf.append(lastData.toString());
        return buf.toString();
    }
}