com.trusolve.ant.filters.JsonToYamlFilter.java Source code

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Here is the source code for com.trusolve.ant.filters.JsonToYamlFilter.java

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/**
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1
 * 
 * The contents of this file are subject to the Mozilla Public License Version 
 * 1.1 (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.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 * 
 * The Original Code is truSolve Utilities.
 * 
 * The Initial Developer of the Original Code is
 * truSolve.com.
 * Portions created by the Initial Developer are Copyright (C) 2011
 * the Initial Developer. All Rights Reserved.
 * 
 * Contributor(s):
 * 
 * ***** END LICENSE BLOCK *****
 *
 * $Id$
 *
 */

package com.trusolve.ant.filters;

import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Map;

import javax.script.ScriptContext;

import org.apache.tools.ant.filters.BaseParamFilterReader;
import org.apache.tools.ant.types.Parameter;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import com.trusolve.json.YamlToJson;

/**
 * @author Preston Gilchrist
 *
 */
public class JsonToYamlFilter extends BaseParamFilterReader {

    @SuppressWarnings("unused")
    private static final String CLASS_ID = "$Id$";

    public JsonToYamlFilter(Reader in) throws IOException {
        super(readDocument(in));
    }

    public int read() throws IOException {
        return super.read();
    }

    public static Reader readDocument(Reader in) throws JsonProcessingException, IOException {
        ObjectMapper jsonIn = new ObjectMapper();
        JsonNode jn = jsonIn.readTree(in);

        YAMLFactory yf = new YAMLFactory();
        StringWriter sw = new StringWriter();

        yf.createGenerator(sw).setCodec(new ObjectMapper(yf)).writeObject(jn);

        return new StringReader(sw.toString());
    }
}