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/*
 * Copyright 1999,2005 The Apache Software Foundation.
 * 
 * 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.apache.xmlrpc.parser;

import java.util.ArrayList;
import java.util.List;

import javax.xml.namespace.QName;

import org.apache.ws.commons.util.NamespaceContextImpl;
import org.apache.xmlrpc.common.TypeFactory;
import org.apache.xmlrpc.common.XmlRpcStreamConfig;
import org.apache.xmlrpc.serializer.ObjectArraySerializer;
import org.apache.xmlrpc.serializer.TypeSerializerImpl;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;


/** Parser for an array of objects, as created by
 * {@link org.apache.xmlrpc.serializer.ObjectArraySerializer}.
 */
public class ObjectArrayParser extends RecursiveTypeParserImpl {
	private int level = 0;
	private List list;
	
	/** Creates a new instance.
	 * @param pContext The namespace context.
	 * @param pConfig The request or response configuration.
	 * @param pFactory The type factory.
	 */
	public ObjectArrayParser(XmlRpcStreamConfig pConfig,
							 NamespaceContextImpl pContext,
							 TypeFactory pFactory) {
		super(pConfig, pContext, pFactory);
	}

	public void startDocument() throws SAXException {
		level = 0;
		list = new ArrayList();
		super.startDocument();
	}

	protected void addResult(Object pValue) {
		list.add(pValue);
	}

	public void endElement(String pURI, String pLocalName, String pQName) throws SAXException {
		switch (--level) {
			case 0:
				setResult(list.toArray());
				break;
			case 1:
				break;
			case 2:
				endValueTag();
				break;
			default:
				super.endElement(pURI, pLocalName, pQName);
		}
	}

	public void startElement(String pURI, String pLocalName, String pQName, Attributes pAttrs) throws SAXException {
		switch (level++) {
			case 0:
				if (!"".equals(pURI)  ||  !ObjectArraySerializer.ARRAY_TAG.equals(pLocalName)) {
					throw new SAXParseException("Expected array element, got "
												+ new QName(pURI, pLocalName),
												getDocumentLocator());
				}
				break;
			case 1:
				if (!"".equals(pURI)  ||  !ObjectArraySerializer.DATA_TAG.equals(pLocalName)) {
					throw new SAXParseException("Expected data element, got "
												+ new QName(pURI, pLocalName),
												getDocumentLocator());
				}
				break;
			case 2:
				if (!"".equals(pURI)  ||  !TypeSerializerImpl.VALUE_TAG.equals(pLocalName)) {
					throw new SAXParseException("Expected data element, got "
												+ new QName(pURI, pLocalName),
												getDocumentLocator());
				}
				startValueTag();
				break;
			default:
				super.startElement(pURI, pLocalName, pQName, pAttrs);
				break;
		}
	}

}