Clover coverage report - dom4j - 1.6.1
Coverage timestamp: ma mei 16 2005 14:23:01 GMT+01:00
Overview   Package   File
    FRAMES   NO FRAMES  
file stats: LOC: 216   Methods: 4
NCLOC: 89   Classes: 1
 
 Source file Conditionals Statements Methods TOTAL
NamespaceCache.java 80% 87,2% 100% 85,9%
coverage coverage
 1    /*
 2    * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
 3    *
 4    * This software is open source.
 5    * See the bottom of this file for the licence.
 6    */
 7   
 8    package org.dom4j.tree;
 9   
 10    import java.lang.ref.WeakReference;
 11    import java.lang.reflect.Constructor;
 12    import java.util.Map;
 13   
 14    import org.dom4j.Namespace;
 15   
 16    /**
 17    * <p>
 18    * <code>NamespaceCache</code> caches instances of
 19    * <code>DefaultNamespace</code> for reuse both across documents and within
 20    * documents.
 21    * </p>
 22    *
 23    * @author <a href="mailto:james.strachan@metastuff.com">James Strachan </a>
 24    * @author Maarten Coene
 25    * @author Brett Finnell
 26    * @version $Revision: 1.15 $
 27    */
 28    public class NamespaceCache {
 29    private static final String CONCURRENTREADERHASHMAP_CLASS
 30    = "EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap";
 31   
 32    /**
 33    * Cache of {@link Map}instances indexed by URI which contain caches of
 34    * {@link Namespace}for each prefix
 35    */
 36    protected static Map cache;
 37   
 38    /**
 39    * Cache of {@link Namespace}instances indexed by URI for default
 40    * namespaces with no prefixes
 41    */
 42    protected static Map noPrefixCache;
 43   
 44    static {
 45    /* Try the java.util.concurrent.ConcurrentHashMap first. */
 46  90 try {
 47  90 Class clazz = Class
 48    .forName("java.util.concurrent.ConcurrentHashMap");
 49  0 Constructor construct = clazz.getConstructor(new Class[] {
 50    Integer.TYPE, Float.TYPE, Integer.TYPE });
 51  0 cache = (Map) construct.newInstance(new Object[] {new Integer(11),
 52    new Float(0.75f), new Integer(1) });
 53  0 noPrefixCache = (Map) construct.newInstance(new Object[] {
 54    new Integer(11), new Float(0.75f), new Integer(1) });
 55    } catch (Throwable t1) {
 56    /* Try to use the util.concurrent library (if in classpath) */
 57  90 try {
 58  90 Class clazz = Class.forName(CONCURRENTREADERHASHMAP_CLASS);
 59  0 cache = (Map) clazz.newInstance();
 60  0 noPrefixCache = (Map) clazz.newInstance();
 61    } catch (Throwable t2) {
 62    /* If previous implementations fail, use internal one */
 63  90 cache = new ConcurrentReaderHashMap();
 64  90 noPrefixCache = new ConcurrentReaderHashMap();
 65    }
 66    }
 67    }
 68   
 69    /**
 70    * DOCUMENT ME!
 71    *
 72    * @param prefix
 73    * DOCUMENT ME!
 74    * @param uri
 75    * DOCUMENT ME!
 76    *
 77    * @return the namespace for the given prefix and uri
 78    */
 79  1121352 public Namespace get(String prefix, String uri) {
 80  1121352 Map uriCache = getURICache(uri);
 81  1121352 WeakReference ref = (WeakReference) uriCache.get(prefix);
 82  1121352 Namespace answer = null;
 83   
 84  1121352 if (ref != null) {
 85  1111030 answer = (Namespace) ref.get();
 86    }
 87   
 88  1121352 if (answer == null) {
 89  10328 synchronized (uriCache) {
 90  10328 ref = (WeakReference) uriCache.get(prefix);
 91   
 92  10328 if (ref != null) {
 93  6 answer = (Namespace) ref.get();
 94    }
 95   
 96  10328 if (answer == null) {
 97  10328 answer = createNamespace(prefix, uri);
 98  10328 uriCache.put(prefix, new WeakReference(answer));
 99    }
 100    }
 101    }
 102   
 103  1121352 return answer;
 104    }
 105   
 106    /**
 107    * DOCUMENT ME!
 108    *
 109    * @param uri
 110    * DOCUMENT ME!
 111    *
 112    * @return the name model for the given name and namepsace
 113    */
 114  26 public Namespace get(String uri) {
 115  26 WeakReference ref = (WeakReference) noPrefixCache.get(uri);
 116  26 Namespace answer = null;
 117   
 118  26 if (ref != null) {
 119  20 answer = (Namespace) ref.get();
 120    }
 121   
 122  26 if (answer == null) {
 123  6 synchronized (noPrefixCache) {
 124  6 ref = (WeakReference) noPrefixCache.get(uri);
 125   
 126  6 if (ref != null) {
 127  0 answer = (Namespace) ref.get();
 128    }
 129   
 130  6 if (answer == null) {
 131  6 answer = createNamespace("", uri);
 132  6 noPrefixCache.put(uri, new WeakReference(answer));
 133    }
 134    }
 135    }
 136   
 137  26 return answer;
 138    }
 139   
 140    /**
 141    * DOCUMENT ME!
 142    *
 143    * @param uri
 144    * DOCUMENT ME!
 145    *
 146    * @return the cache for the given namespace URI. If one does not currently
 147    * exist it is created.
 148    */
 149  1121352 protected Map getURICache(String uri) {
 150  1121352 Map answer = (Map) cache.get(uri);
 151   
 152  1121352 if (answer == null) {
 153  10296 synchronized (cache) {
 154  10296 answer = (Map) cache.get(uri);
 155   
 156  10296 if (answer == null) {
 157  10296 answer = new ConcurrentReaderHashMap();
 158  10296 cache.put(uri, answer);
 159    }
 160    }
 161    }
 162   
 163  1121352 return answer;
 164    }
 165   
 166    /**
 167    * A factory method to create {@link Namespace}instance
 168    *
 169    * @param prefix
 170    * DOCUMENT ME!
 171    * @param uri
 172    * DOCUMENT ME!
 173    *
 174    * @return a newly created {@link Namespace}instance.
 175    */
 176  10334 protected Namespace createNamespace(String prefix, String uri) {
 177  10334 return new Namespace(prefix, uri);
 178    }
 179    }
 180   
 181    /*
 182    * Redistribution and use of this software and associated documentation
 183    * ("Software"), with or without modification, are permitted provided that the
 184    * following conditions are met:
 185    *
 186    * 1. Redistributions of source code must retain copyright statements and
 187    * notices. Redistributions must also contain a copy of this document.
 188    *
 189    * 2. Redistributions in binary form must reproduce the above copyright notice,
 190    * this list of conditions and the following disclaimer in the documentation
 191    * and/or other materials provided with the distribution.
 192    *
 193    * 3. The name "DOM4J" must not be used to endorse or promote products derived
 194    * from this Software without prior written permission of MetaStuff, Ltd. For
 195    * written permission, please contact dom4j-info@metastuff.com.
 196    *
 197    * 4. Products derived from this Software may not be called "DOM4J" nor may
 198    * "DOM4J" appear in their names without prior written permission of MetaStuff,
 199    * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
 200    *
 201    * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
 202    *
 203    * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
 204    * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 205    * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 206    * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
 207    * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 208    * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 209    * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 210    * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 211    * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 212    * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 213    * POSSIBILITY OF SUCH DAMAGE.
 214    *
 215    * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
 216    */
 
CloverReport generated by Clover Code Coverage v1.3.5
ma mei 16 2005 14:23:02 GMT+01:00.		   Open Source License registered to the dom4j Project. This license of Clover is provided to support the development of dom4j only.