MapParser.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.xmlrpc.parser;

import java.util.HashMap;
import java.util.Map;

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.MapSerializer;
import org.apache.xmlrpc.serializer.TypeSerializerImpl;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;


public class MapParser extends RecursiveTypeParserImpl {
        private int level = 0;
        private StringBuffer nameBuffer = new StringBuffer();
    private Object nameObject;
        private Map map;
        private boolean inName, inValue, doneValue;

        public MapParser(XmlRpcStreamConfig pConfig,
                                         NamespaceContextImpl pContext,
                                         TypeFactory pFactory) {
                super(pConfig, pContext, pFactory);
        }

        protected void addResult(Object pResult) throws SAXException {
            if (inName) {
                nameObject = pResult;
        } else {
            if (nameObject == null) {
                        throw new SAXParseException("Invalid state: Expected name",
                                                                                getDocumentLocator());
                } else {
                        if (map.containsKey(nameObject)) {
                                throw new SAXParseException("Duplicate name: " + nameObject,
                                                                                        getDocumentLocator());
                        } else {
                                map.put(nameObject, pResult);
                        }
                }
        }
        }

        public void startDocument() throws SAXException {
                super.startDocument();
                level = 0;
                map = new HashMap();
                inValue = inName = false;
        }

        public void characters(char[] pChars, int pOffset, int pLength) throws SAXException {
                if (inName  &&  !inValue) {
            nameBuffer.append(pChars, pOffset, pLength);
                } else {
                        super.characters(pChars, pOffset, pLength);
                }
        }

        public void ignorableWhitespace(char[] pChars, int pOffset, int pLength) throws SAXException {
                if (inName) {
                        characters(pChars, pOffset, pLength);
                } else {
                        super.ignorableWhitespace(pChars, pOffset, pLength);
                }
        }

        public void startElement(String pURI, String pLocalName, String pQName,
                                                         Attributes pAttrs) throws SAXException {
                switch (level++) {
                        case 0:
                                if (!"".equals(pURI)  ||  !MapSerializer.STRUCT_TAG.equals(pLocalName)) {
                                        throw new SAXParseException("Expected " + MapSerializer.STRUCT_TAG + ", got "
                                                                                                + new QName(pURI, pLocalName),
                                                                                                getDocumentLocator());
                                }
                                break;
                        case 1:
                                if (!"".equals(pURI)  ||  !MapSerializer.MEMBER_TAG.equals(pLocalName)) {
                                        throw new SAXParseException("Expected " + MapSerializer.MEMBER_TAG + ", got "
                                                                                                + new QName(pURI, pLocalName),
                                                                                                getDocumentLocator());
                                }
                                doneValue = inName = inValue = false;
                nameObject = null;
                nameBuffer.setLength(0);
                                break;
                        case 2:
                                if (doneValue) {
                                        throw new SAXParseException("Expected /" + MapSerializer.MEMBER_TAG
                                                                                                + ", got " + new QName(pURI, pLocalName),
                                                                                                getDocumentLocator());
                                }
                                if ("".equals(pURI)  &&  MapSerializer.NAME_TAG.equals(pLocalName)) {
                                        if (nameObject == null) {
                                                inName = true;
                                        } else {
                                                throw new SAXParseException("Expected " + TypeSerializerImpl.VALUE_TAG
                                                                                                        + ", got " + new QName(pURI, pLocalName),
                                                                                                        getDocumentLocator());
                                        }
                                } else if ("".equals(pURI)  &&  TypeSerializerImpl.VALUE_TAG.equals(pLocalName)) {
                                        if (nameObject == null) {
                                                throw new SAXParseException("Expected " + MapSerializer.NAME_TAG
                                                                                                        + ", got " + new QName(pURI, pLocalName),
                                                                                                        getDocumentLocator());
                                        } else {
                                                inValue = true;
                                                startValueTag();
                                        }
                                        
                                }
                                break;
            case 3:
                if (inName  &&  "".equals(pURI)  &&  TypeSerializerImpl.VALUE_TAG.equals(pLocalName)) {
                    if (cfg.isEnabledForExtensions()) {
                        inValue = true;
                        startValueTag();
                    } else {
                        throw new SAXParseException("Expected /" + MapSerializer.NAME_TAG
                                + ", got " + new QName(pURI, pLocalName),
                                getDocumentLocator());
                    }
                } else {
                    super.startElement(pURI, pLocalName, pQName, pAttrs);
                }
                break;
                        default:
                                super.startElement(pURI, pLocalName, pQName, pAttrs);
                                break;
                }
        }

        public void endElement(String pURI, String pLocalName, String pQName) throws SAXException {
                switch (--level) {
                        case 0:
                                setResult(map);
                                break;
                        case 1:
                                break;
                        case 2:
                                if (inName) {
                                        inName = false;
                                        if (nameObject == null) {
                                            nameObject = nameBuffer.toString();
                    } else {
                        for (int i = 0;  i < nameBuffer.length();  i++) {
                            if (!Character.isWhitespace(nameBuffer.charAt(i))) {
                                throw new SAXParseException("Unexpected non-whitespace character in member name",
                                        getDocumentLocator());
                            }
                        }
                    }
                } else if (inValue) {
                                        endValueTag();
                                        doneValue = true;
                                }
                                break;
            case 3:
                if (inName  &&  inValue  &&  "".equals(pURI)  &&  TypeSerializerImpl.VALUE_TAG.equals(pLocalName)) {
                    endValueTag();
                } else {
                    super.endElement(pURI, pLocalName, pQName);
                }
                break;
                        default:
                                super.endElement(pURI, pLocalName, pQName);
                }
        }
}