1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Copyright 1999-2004 The Apache Software Foundation. 7 * 8 * Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 * 20 */ 21 package com.sun.org.apache.xml.internal.security.utils; 22 23 import com.sun.org.apache.xpath.internal.CachedXPathAPI; 24 import org.w3c.dom.Document; 25 26 /** 27 * @author Raul Benito 28 */ 29 public class CachedXPathAPIHolder { 30 31 static ThreadLocal<CachedXPathAPI> local=new ThreadLocal<CachedXPathAPI>(); 32 static ThreadLocal<Document> localDoc=new ThreadLocal<Document>(); 33 34 /** 35 * Sets the doc for the xpath transformation. Resets the cache if needed 36 * @param doc 37 */ 38 public static void setDoc(Document doc) { 39 if (localDoc.get()!=doc) { 40 CachedXPathAPI cx=local.get(); 41 if (cx==null) { 42 cx=new CachedXPathAPI(); 43 local.set(cx); 44 localDoc.set(doc); 45 return; 46 } 47 //Different docs reset. 48 cx.getXPathContext().reset(); 49 localDoc.set(doc); 50 } 51 } 52 53 /** 54 * @return the cachexpathapi for this thread 55 */ 56 public static CachedXPathAPI getCachedXPathAPI() { 57 CachedXPathAPI cx=local.get(); 58 if (cx==null) { 59 cx=new CachedXPathAPI(); 60 local.set(cx); 61 localDoc.set(null); 62 } 63 return cx; 64 } 65 }