| /* |
| * 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.s3.xml; |
| |
| import static org.jclouds.util.SaxUtils.currentOrNull; |
| |
| import javax.inject.Inject; |
| |
| import org.jclouds.aws.domain.Region; |
| import org.jclouds.http.HttpRequest; |
| import org.jclouds.http.functions.ParseSax; |
| import org.jclouds.rest.internal.GeneratedHttpRequest; |
| import org.jclouds.s3.Bucket; |
| |
| import com.google.common.base.Optional; |
| import com.google.common.cache.LoadingCache; |
| |
| /** |
| * Parses the response from Amazon S3 GET Bucket Location |
| * <p/> |
| * Region is the document we expect to parse. |
| */ |
| public class LocationConstraintHandler extends ParseSax.HandlerWithResult<String> { |
| private final LoadingCache<String, Optional<String>> bucketToRegion; |
| private StringBuilder currentText = new StringBuilder(); |
| private String region; |
| private String bucket; |
| |
| @Inject |
| public LocationConstraintHandler(@Bucket LoadingCache<String, Optional<String>> bucketToRegion) { |
| this.bucketToRegion = bucketToRegion; |
| } |
| |
| public String getResult() { |
| return region; |
| } |
| |
| public void endElement(String uri, String name, String qName) { |
| region = fromValue(currentOrNull(currentText)); |
| bucketToRegion.put(bucket, Optional.fromNullable(region)); |
| } |
| |
| @Override |
| public LocationConstraintHandler setContext(HttpRequest request) { |
| super.setContext(request); |
| setBucket(GeneratedHttpRequest.class.cast(getRequest()).getInvocation().getArgs().get(0).toString()); |
| return this; |
| } |
| |
| void setBucket(String bucket) { |
| this.bucket = bucket; |
| } |
| |
| /** |
| * parses the value expected in xml documents from the S3 service.= |
| * <p/> |
| * {@code US_STANDARD} is returned as "" xml documents. |
| */ |
| public static String fromValue(String v) { |
| if (v == null || "".equals(v)) |
| return Region.US_STANDARD; |
| if ("EU".equals(v)) |
| return "eu-west-1"; |
| return v; |
| } |
| |
| public void characters(char[] ch, int start, int length) { |
| currentText.append(ch, start, length); |
| } |
| } |