/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.script.mustache;

import com.fasterxml.jackson.core.io.JsonStringEncoder;
import com.github.mustachejava.DefaultMustacheFactory;
import com.github.mustachejava.MustacheException;

import java.io.IOException;
import java.io.Writer;

/**
 * A MustacheFactory that does simple JSON escaping.
 */
public final class JsonEscapingMustacheFactory extends DefaultMustacheFactory {
    
    @Override
    public void encode(String value, Writer writer) {
        try {
            JsonStringEncoder utils = new JsonStringEncoder();
            writer.write(utils.quoteAsString(value));;
        } catch (IOException e) {
            throw new MustacheException("Failed to encode value: " + value);
        }
    }
}
