org.jclouds.azureblob.xml.ContainerNameEnumerationResultsHandler Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of azureblob Show documentation
jclouds components to access Azure Blob Service
The newest version!
/*
 * 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.jclouds.azureblob.xml;

import static com.google.common.io.BaseEncoding.base64;
import static org.jclouds.http.Uris.uriBuilder;

import java.net.URI;
import java.util.Date;
import java.util.Map;
import java.util.Set;

import javax.inject.Inject;

import org.jclouds.azureblob.domain.BlobProperties;
import org.jclouds.azureblob.domain.BlobType;
import org.jclouds.azureblob.domain.LeaseStatus;
import org.jclouds.azureblob.domain.ListBlobsResponse;
import org.jclouds.azureblob.domain.internal.BlobPropertiesImpl;
import org.jclouds.azureblob.domain.internal.HashSetListBlobsResponse;
import org.jclouds.date.DateService;
import org.jclouds.http.functions.ParseSax;
import org.jclouds.io.ContentMetadataCodec;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

import com.google.common.collect.Maps;
import com.google.common.collect.Sets;

/**
 * Parses the following XML document:
 * 
 * EnumerationResults ContainerName="http://myaccount.blob.core.windows.net/mycontainer"
 * 
 * @see 
 * @author Adrian Cole
 */
public class ContainerNameEnumerationResultsHandler extends ParseSax.HandlerWithResult {
   private Set blobMetadata = Sets.newLinkedHashSet();
   private String prefix;
   private String marker;
   private int maxResults;
   private String nextMarker;
   private URI currentUrl;
   private URI containerUrl;
   private Date currentLastModified;
   private String currentETag;

   private StringBuilder currentText = new StringBuilder();

   private final DateService dateParser;
   private final ContentMetadataCodec contentMetadataCodec;
   private String delimiter;
   private String currentName;
   private long currentSize;
   private String currentContentType;
   private String currentContentEncoding;
   private String currentContentLanguage;
   private BlobType currentBlobType;
   private Date currentExpires;
   private boolean inBlob;
   private boolean inBlobPrefix;
   private boolean inMetadata;
   private Set blobPrefixes = Sets.newHashSet();
   private byte[] currentContentMD5;
   private Map currentMetadata = Maps.newHashMap();
   private LeaseStatus currentLeaseStatus;

   @Inject
   public ContainerNameEnumerationResultsHandler(DateService dateParser, ContentMetadataCodec contentMetadataCodec) {
      this.dateParser = dateParser;
      this.contentMetadataCodec = contentMetadataCodec;
   }

   public ListBlobsResponse getResult() {
      return new HashSetListBlobsResponse(blobMetadata, containerUrl, prefix, marker, maxResults, nextMarker,
               delimiter, blobPrefixes);
   }

   @Override
   public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
      if (qName.equals("Blob")) {
         inBlob = true;
         inBlobPrefix = false;
         inMetadata = false;
      } else if (qName.equals("BlobPrefix")) {
         inBlob = false;
         inBlobPrefix = true;
      } else if (qName.equals("Metadata")) {
         inBlob = true;
         inMetadata = true;
      } else if (qName.equals("EnumerationResults")) {
         containerUrl = URI.create(attributes.getValue("ContainerName").toString().trim());
      }
   }

   public void endElement(String uri, String name, String qName) {
      if (inMetadata && !qName.equals("Metadata")) {
         currentMetadata.put(qName, currentText.toString().trim());
      } else if (qName.equals("Metadata")) {
         inMetadata = false;
      } else if (qName.equals("MaxResults")) {
         maxResults = Integer.parseInt(currentText.toString().trim());
      } else if (qName.equals("Marker")) {
         marker = currentText.toString().trim();
         marker = (marker.equals("")) ? null : marker;
      } else if (qName.equals("Prefix")) {
         prefix = currentText.toString().trim();
         prefix = (prefix.equals("")) ? null : prefix;
      } else if (qName.equals("Delimiter")) {
         delimiter = currentText.toString().trim();
         delimiter = (delimiter.equals("")) ? null : delimiter;
      } else if (qName.equals("NextMarker")) {
         nextMarker = currentText.toString().trim();
         nextMarker = (nextMarker.equals("")) ? null : nextMarker;
      } else if (qName.equals("BlobType")) {
         currentBlobType = BlobType.fromValue(currentText.toString().trim());
      } else if (qName.equals("LeaseStatus")) {
         currentLeaseStatus = LeaseStatus.fromValue(currentText.toString().trim());
      } else if (qName.equals("Blob")) {
         BlobProperties md = new BlobPropertiesImpl(currentBlobType, currentName, containerUrl.getPath().replace("/",
                  ""), currentUrl, currentLastModified, currentETag, currentSize, currentContentType,
                  currentContentMD5, currentContentEncoding, currentContentLanguage, currentExpires, 
                  currentLeaseStatus, currentMetadata);
         blobMetadata.add(md);
         currentBlobType = null;
         currentName = null;
         currentUrl = null;
         currentLastModified = null;
         currentETag = null;
         currentSize = -1;
         currentContentType = null;
         currentContentEncoding = null;
         currentContentLanguage = null;
         currentContentMD5 = null;
         currentLeaseStatus = null;
         currentExpires = null;
         currentMetadata = Maps.newHashMap();
      } else if (qName.equals("Url")) {
         currentUrl = uriBuilder(currentText.toString().trim()).build();
      } else if (qName.equals("Last-Modified")) {
         currentLastModified = dateParser.rfc822DateParse(currentText.toString().trim());
      } else if (qName.equals("Etag")) {
         currentETag = currentText.toString().trim();
      } else if (qName.equals("Name")) {
         if (inBlob)
            currentName = currentText.toString().trim();
         else if (inBlobPrefix)
            blobPrefixes.add(currentText.toString().trim());
      } else if (qName.equals("Content-Length")) {
         currentSize = Long.parseLong(currentText.toString().trim());
      } else if (qName.equals("Content-MD5")) {
         if (!currentText.toString().trim().equals(""))
            currentContentMD5 = base64().decode(currentText.toString().trim());
      } else if (qName.equals("Content-Type")) {
         currentContentType = currentText.toString().trim();
      } else if (qName.equals("Content-Encoding")) {
         currentContentEncoding = currentText.toString().trim();
         if (currentContentEncoding.equals(""))
            currentContentEncoding = null;
      } else if (qName.equals("Content-Language")) {
         currentContentLanguage = currentText.toString().trim();
         if (currentContentLanguage.equals(""))
            currentContentLanguage = null;
      } else if (qName.equals("Expires")) {
         String trimmedCurrentText = currentText.toString().trim();
         if (trimmedCurrentText.equals("")) {
            currentExpires = null;
         } else {
            currentExpires = contentMetadataCodec.parseExpires(trimmedCurrentText);
         }
      }
      currentText = new StringBuilder();
   }

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