RecursiveTypeParserImpl.java :  » App » sk-livejournal » org » apache » xmlrpc » parser » Android Open Source

/*
 * 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 sk.pack.var.QName;

import org.apache.ws.commons.util.NamespaceContextImpl;
import org.apache.xmlrpc.XmlRpcException;
import org.apache.xmlrpc.common.TypeFactory;
import org.apache.xmlrpc.common.XmlRpcExtensionException;
import org.apache.xmlrpc.common.XmlRpcStreamConfig;
import org.apache.xmlrpc.serializer.XmlRpcWriter;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

/**
 * Abstract base class of a parser, that invokes other type parsers recursively.
 */
public abstract class RecursiveTypeParserImpl extends TypeParserImpl {
  private final NamespaceContextImpl context;
  protected final XmlRpcStreamConfig cfg;
  private final TypeFactory factory;
  private boolean inValueTag;
  private TypeParser typeParser;
  private StringBuffer text = new StringBuffer();

  /**
   * Creates a new instance.
   * 
   * @param pContext
   *            The namespace context.
   * @param pConfig
   *            The request or response configuration.
   * @param pFactory
   *            The type factory.
   */
  protected RecursiveTypeParserImpl(XmlRpcStreamConfig pConfig,
      NamespaceContextImpl pContext, TypeFactory pFactory) {
    cfg = pConfig;
    context = pContext;
    factory = pFactory;
  }

  protected void startValueTag() throws SAXException {
    inValueTag = true;
    text.setLength(0);
    typeParser = null;
  }

  protected abstract void addResult(Object pResult) throws SAXException;

  protected void endValueTag() throws SAXException {
    if (inValueTag) {
      if (typeParser == null) {
        addResult(text.toString());
        text.setLength(0);
      } else {
        typeParser.endDocument();
        try {
          addResult(typeParser.getResult());
        } catch (XmlRpcException e) {
          throw new SAXException(e);
        }
        typeParser = null;
      }
    } else {
      throw new SAXParseException("Invalid state: Not inside value tag.",
          getDocumentLocator());
    }
  }

  public void startDocument() throws SAXException {
    inValueTag = false;
    text.setLength(0);
    typeParser = null;
  }

  public void endElement(String pURI, String pLocalName, String pQName)
      throws SAXException {
    if (inValueTag) {
      if (typeParser == null) {
        throw new SAXParseException(
            "Invalid state: No type parser configured.",
            getDocumentLocator());
      } else {
        typeParser.endElement(pURI, pLocalName, pQName);
      }
    } else {
      throw new SAXParseException("Invalid state: Not inside value tag.",
          getDocumentLocator());
    }
  }

  public void startElement(String pURI, String pLocalName, String pQName,
      Attributes pAttrs) throws SAXException {
    if (inValueTag) {
      if (typeParser == null) {
        typeParser = factory.getParser(cfg, context, pURI, pLocalName);
        if (typeParser == null) {
          if (XmlRpcWriter.EXTENSIONS_URI.equals(pURI)
              && !cfg.isEnabledForExtensions()) {
            String msg = "The tag "
                + new QName(pURI, pLocalName)
                + " is invalid, if isEnabledForExtensions() == false.";
            throw new SAXParseException(msg, getDocumentLocator(),
                new XmlRpcExtensionException(msg));
          } else {
            throw new SAXParseException("Unknown type: "
                + new QName(pURI, pLocalName),
                getDocumentLocator());
          }
        }
        typeParser.setDocumentLocator(getDocumentLocator());
        typeParser.startDocument();
        if (text.length() > 0) {
          typeParser.characters(text.toString().toCharArray(), 0,
              text.length());
          text.setLength(0);
        }
      }
      typeParser.startElement(pURI, pLocalName, pQName, pAttrs);
    } else {
      throw new SAXParseException("Invalid state: Not inside value tag.",
          getDocumentLocator());
    }
  }

  public void characters(char[] pChars, int pOffset, int pLength)
      throws SAXException {
    if (typeParser == null) {
      if (inValueTag) {
        text.append(pChars, pOffset, pLength);
      } else {
        super.characters(pChars, pOffset, pLength);
      }
    } else {
      typeParser.characters(pChars, pOffset, pLength);
    }
  }

  public void ignorableWhitespace(char[] pChars, int pOffset, int pLength)
      throws SAXException {
    if (typeParser == null) {
      if (inValueTag) {
        text.append(pChars, pOffset, pLength);
      } else {
        super.ignorableWhitespace(pChars, pOffset, pLength);
      }
    } else {
      typeParser.ignorableWhitespace(pChars, pOffset, pLength);
    }
  }

  public void processingInstruction(String pTarget, String pData)
      throws SAXException {
    if (typeParser == null) {
      super.processingInstruction(pTarget, pData);
    } else {
      typeParser.processingInstruction(pTarget, pData);
    }
  }

  public void skippedEntity(String pEntity) throws SAXException {
    if (typeParser == null) {
      super.skippedEntity(pEntity);
    } else {
      typeParser.skippedEntity(pEntity);
    }
  }

  public void startPrefixMapping(String pPrefix, String pURI)
      throws SAXException {
    if (typeParser == null) {
      super.startPrefixMapping(pPrefix, pURI);
    } else {
      context.startPrefixMapping(pPrefix, pURI);
    }
  }

  public void endPrefixMapping(String pPrefix) throws SAXException {
    if (typeParser == null) {
      super.endPrefixMapping(pPrefix);
    } else {
      context.endPrefixMapping(pPrefix);
    }
  }
}