/*
 * Copyright 2016-2019 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * 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.
 */
package org.jboss.galleon.util.formatparser.handlers;

import org.jboss.galleon.util.formatparser.FormatContentHandler;
import org.jboss.galleon.util.formatparser.FormatParsingException;
import org.jboss.galleon.util.formatparser.ParsingFormat;

/**
 *
 * @author Alexey Loubyansky
 */
public class KeyValueContentHandler extends FormatContentHandler {

    Object key;
    Object value;

    public KeyValueContentHandler(ParsingFormat format, int strIndex) {
        super(format, strIndex);
    }

    /* (non-Javadoc)
     * @see org.jboss.galleon.spec.type.ParsingCallbackHandler#addChild(org.jboss.galleon.spec.type.ParsingCallbackHandler)
     */
    @Override
    public void addChild(FormatContentHandler childHandler) throws FormatParsingException {
        if(key == null) {
            key = childHandler.getContent();
        } else if(value != null) {
            throw new FormatParsingException("The value has already been initialized for the name '" + key + "'");
        } else {
            value = childHandler.getContent();
        }
    }

    /* (non-Javadoc)
     * @see org.jboss.galleon.spec.type.ParsingCallbackHandler#getParsedValue()
     */
    @Override
    public Object getContent() throws FormatParsingException {
        throw new UnsupportedOperationException();
    }
}
