org.json.simple.JSONWriter.java Source code

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Here is the source code for org.json.simple.JSONWriter.java

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/*
 * 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.
 *
 * @author Elad Tabak
 * @author Maciej Komosinski, minor improvements
 *
 */
package org.json.simple;

import java.io.StringWriter;

/**
 * Sample usage:
 * <pre>
 * Writer writer = new JSONWriter(); // this writer adds indentation
 * jsonobject.writeJSONString(writer);
 * System.out.println(writer.toString());
 * </pre>
 *
 * @author Elad Tabak
 * @author Maciej Komosinski, minor improvements, 2015
 * @since 28-Nov-2011
 * @version 0.2
 */
public class JSONWriter extends StringWriter {
    final static String indentstring = "  "; //define as you wish
    final static String spaceaftercolon = " "; //use "" if you don't want space after colon

    private int indentlevel = 0;

    @Override
    public void write(int c) {
        char ch = (char) c;
        if (ch == '[' || ch == '{') {
            super.write(c);
            super.write('\n');
            indentlevel++;
            writeIndentation();
        } else if (ch == ',') {
            super.write(c);
            super.write('\n');
            writeIndentation();
        } else if (ch == ']' || ch == '}') {
            super.write('\n');
            indentlevel--;
            writeIndentation();
            super.write(c);
        } else if (ch == ':') {
            super.write(c);
            super.write(spaceaftercolon);
        } else {
            super.write(c);
        }

    }

    private void writeIndentation() {
        for (int i = 0; i < indentlevel; i++) {
            super.write(indentstring);
        }
    }
}