/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.jclouds.ultradns.ws.xml;

import static org.jclouds.util.SaxUtils.currentOrNull;
import static org.jclouds.util.SaxUtils.equalsOrSuffix;

import org.jclouds.http.functions.ParseSax;
import org.jclouds.ultradns.ws.UltraDNSWSError;

import com.google.common.base.Optional;

/**
 * 
 * @author Adrian Cole
 */
public class UltraWSExceptionHandler extends ParseSax.HandlerForGeneratedRequestWithResult<UltraDNSWSError> {

   private StringBuilder currentText = new StringBuilder();
   private int code = -1;
   private String description;

   @Override
   public UltraDNSWSError getResult() {
      return code != -1 ? UltraDNSWSError.fromCodeAndDescription(code, Optional.fromNullable(description)) : null;
   }

   @Override
   public void endElement(String uri, String name, String qName) {
      if (equalsOrSuffix(qName, "errorCode")) {
         code = Integer.parseInt(currentOrNull(currentText));
      } else if (equalsOrSuffix(qName, "errorDescription")) {
         description = currentOrNull(currentText);
      }
      currentText = new StringBuilder();
   }

   @Override
   public void characters(char ch[], int start, int length) {
      currentText.append(ch, start, length);
   }

}