| /** |
| * 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.cxf.jaxrs.impl; |
| |
| import javax.ws.rs.core.EntityTag; |
| import javax.ws.rs.ext.RuntimeDelegate.HeaderDelegate; |
| |
| public class EntityTagHeaderProvider implements HeaderDelegate<EntityTag> { |
| |
| private static final String WEAK_PREFIX = "W/"; |
| |
| public EntityTag fromString(String header) { |
| |
| |
| if (header == null) { |
| throw new IllegalArgumentException("ETag value can not be null"); |
| } |
| |
| if ("*".equals(header)) { |
| return new EntityTag("*"); |
| } |
| |
| String tag; |
| boolean weak = false; |
| int i = header.indexOf(WEAK_PREFIX); |
| if (i != -1) { |
| weak = true; |
| if (i + 2 < header.length()) { |
| tag = header.substring(i + 2); |
| } else { |
| return new EntityTag("", weak); |
| } |
| } else { |
| tag = header; |
| } |
| if (tag.length() > 0 && !tag.startsWith("\"") && !tag.endsWith("\"")) { |
| return new EntityTag(tag, weak); |
| } |
| if (tag.length() < 2 || !tag.startsWith("\"") || !tag.endsWith("\"")) { |
| throw new IllegalArgumentException("Misformatted ETag : " + header); |
| } |
| tag = tag.length() == 2 ? "" : tag.substring(1, tag.length() - 1); |
| return new EntityTag(tag, weak); |
| } |
| |
| public String toString(EntityTag tag) { |
| StringBuilder sb = new StringBuilder(); |
| if (tag.isWeak()) { |
| sb.append(WEAK_PREFIX); |
| } |
| String tagValue = tag.getValue(); |
| if (!tagValue.startsWith("\"")) { |
| sb.append('"').append(tagValue).append('"'); |
| } else { |
| sb.append(tagValue); |
| } |
| return sb.toString(); |
| } |
| |
| } |