diff options
Diffstat (limited to 'branches/sca-java-20080910/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextCache.java')
-rw-r--r-- | branches/sca-java-20080910/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextCache.java | 293 |
1 files changed, 0 insertions, 293 deletions
diff --git a/branches/sca-java-20080910/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextCache.java b/branches/sca-java-20080910/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextCache.java deleted file mode 100644 index 296c39c50f..0000000000 --- a/branches/sca-java-20080910/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextCache.java +++ /dev/null @@ -1,293 +0,0 @@ -/* - * 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.tuscany.sca.databinding.jaxb; - -import java.awt.Image; -import java.net.URI; -import java.security.AccessController; -import java.security.PrivilegedActionException; -import java.security.PrivilegedExceptionAction; -import java.util.Arrays; -import java.util.Calendar; -import java.util.Date; -import java.util.HashMap; -import java.util.HashSet; -import java.util.Set; -import java.util.UUID; - -import javax.activation.DataHandler; -import javax.xml.bind.JAXBContext; -import javax.xml.bind.JAXBException; -import javax.xml.bind.Marshaller; -import javax.xml.bind.Unmarshaller; -import javax.xml.bind.annotation.XmlSchema; -import javax.xml.transform.Source; - -import org.apache.tuscany.sca.databinding.util.LRUCache; - -/** - * @version $Rev$ $Date$ - */ -public class JAXBContextCache { - private static final int CACHE_SIZE = 128; - - private static HashMap<String, Class<?>> loadClassMap = new HashMap<String, Class<?>>(); - - static { - loadClassMap.put("byte", byte.class); - loadClassMap.put("int", int.class); - loadClassMap.put("short", short.class); - loadClassMap.put("long", long.class); - loadClassMap.put("float", float.class); - loadClassMap.put("double", double.class); - loadClassMap.put("boolean", boolean.class); - loadClassMap.put("char", char.class); - loadClassMap.put("void", void.class); - } - - protected static Class<?>[] JAXB_BUILTIN_CLASSES = - {byte[].class, boolean.class, byte.class, char.class, double.class, float.class, int.class, long.class, - short.class, void.class, java.awt.Image.class, java.io.File.class, java.lang.Boolean.class, - java.lang.Byte.class, java.lang.Character.class, java.lang.Class.class, java.lang.Double.class, - java.lang.Float.class, java.lang.Integer.class, java.lang.Long.class, java.lang.Object.class, - java.lang.Short.class, java.lang.String.class, java.lang.Void.class, java.math.BigDecimal.class, - java.math.BigInteger.class, java.net.URI.class, java.net.URL.class, java.util.Calendar.class, - java.util.Date.class, java.util.GregorianCalendar.class, java.util.UUID.class, - javax.activation.DataHandler.class, javax.xml.bind.JAXBElement.class, javax.xml.datatype.Duration.class, - javax.xml.datatype.XMLGregorianCalendar.class, javax.xml.namespace.QName.class, - javax.xml.transform.Source.class}; - - protected static final Set<Class<?>> BUILTIN_CLASSES_SET = new HashSet<Class<?>>(Arrays.asList(JAXB_BUILTIN_CLASSES)); - - /* - protected static Class<?>[] COMMON_ARRAY_CLASSES = - new Class[] {char[].class, short[].class, int[].class, long[].class, float[].class, double[].class, - String[].class - }; - - protected static final Set<Class<?>> COMMON_CLASSES_SET = new HashSet<Class<?>>(Arrays.asList(COMMON_ARRAY_CLASSES)); - */ - - protected LRUCache<Object, JAXBContext> cache; - protected LRUCache<JAXBContext, Unmarshaller> upool; - protected LRUCache<JAXBContext, Marshaller> mpool; - - // protected JAXBContext commonContext; - protected JAXBContext defaultContext; - - public JAXBContextCache() { - this(CACHE_SIZE, CACHE_SIZE, CACHE_SIZE); - } - - public JAXBContextCache(int contextSize, int marshallerSize, int unmarshallerSize) { - cache = new LRUCache<Object, JAXBContext>(contextSize); - upool = new LRUCache<JAXBContext, Unmarshaller>(unmarshallerSize); - mpool = new LRUCache<JAXBContext, Marshaller>(marshallerSize); - defaultContext = getDefaultJAXBContext(); - } - - public static JAXBContext getDefaultJAXBContext() { - try { - return JAXBContext.newInstance(); - } catch (JAXBException e) { - throw new IllegalArgumentException(e); - } - } - - /** - * @param name of primitive type - * @return primitive Class or null - */ - public static Class<?> getPrimitiveClass(String text) { - return loadClassMap.get(text); - } - - /** - * Return the class for this name - * - * @return Class - */ - private static Class<?> forName(final String className, final boolean initialize, final ClassLoader classloader) - throws ClassNotFoundException { - // NOTE: This method must remain private because it uses AccessController - Class<?> cl = null; - try { - cl = AccessController.doPrivileged(new PrivilegedExceptionAction<Class<?>>() { - public Class<?> run() throws ClassNotFoundException { - // Class.forName does not support primitives - Class<?> cls = getPrimitiveClass(className); - if (cls == null) { - cls = Class.forName(className, initialize, classloader); - } - return cls; - } - }); - } catch (PrivilegedActionException e) { - throw (ClassNotFoundException)e.getException(); - } - - return cl; - } - - /** - * @param p Package - * @param cl - * @return true if each package has a ObjectFactory class or package-info - */ - public static boolean checkPackage(String p, ClassLoader cl) { - - // Each package must have an ObjectFactory - try { - Class<?> cls = forName(p + ".ObjectFactory", false, cl); - if (cls != null) { - return true; - } - //Catch Throwable as ClassLoader can throw an NoClassDefFoundError that - //does not extend Exception. So we will absorb any Throwable exception here. - } catch (Throwable e) { - // Ignore - } - - try { - Class<?> cls = forName(p + ".package-info", false, cl); - if (cls != null) { - return cls.isAnnotationPresent(XmlSchema.class); - } - //Catch Throwable as ClassLoader can throw an NoClassDefFoundError that - //does not extend Exception. So we will absorb any Throwable exception here. - } catch (Throwable e) { - // Ignore - } - - return false; - } - - public Marshaller getMarshaller(JAXBContext context) throws JAXBException { - synchronized (mpool) { - Marshaller marshaller = mpool.get(context); - if (marshaller == null) { - marshaller = context.createMarshaller(); - mpool.put(context, marshaller); - } - return marshaller; - } - } - - public Unmarshaller getUnmarshaller(JAXBContext context) throws JAXBException { - synchronized (upool) { - Unmarshaller unmarshaller = upool.get(context); - if (unmarshaller == null) { - unmarshaller = context.createUnmarshaller(); - upool.put(context, unmarshaller); - } - return unmarshaller; - } - } - - public LRUCache<Object, JAXBContext> getCache() { - return cache; - } - - public JAXBContext getJAXBContext(Class<?> cls) throws JAXBException { - if (BUILTIN_CLASSES_SET.contains(cls)) { - return defaultContext; - } - synchronized (cache) { - JAXBContext context = cache.get(cls); - if (context != null) { - return context; - } - Package pkg = cls.getPackage(); - if (pkg != null) { - context = cache.get(pkg); - if (context != null) { - return context; - } - } - - if (pkg != null && checkPackage(pkg.getName(), cls.getClassLoader())) { - context = JAXBContext.newInstance(pkg.getName(), cls.getClassLoader()); - cache.put(pkg, context); - } else { - context = JAXBContext.newInstance(cls); - cache.put(cls, context); - } - return context; - - } - } - - public JAXBContext getJAXBContext(Class<?>[] classes) throws JAXBException { - Set<Class<?>> classSet = new HashSet<Class<?>>(Arrays.asList(classes)); - return getJAXBContext(classSet); - } - - public JAXBContext getJAXBContext(Set<Class<?>> classes) throws JAXBException { - // Remove the JAXB built-in types to maximize the cache hit - Set<Class<?>> classSet = new HashSet<Class<?>>(classes); - classSet.removeAll(BUILTIN_CLASSES_SET); - - // FIXME: [rfeng] Remove java classes that are mapped to the same XSD type to avoid - // conflicts - if (classSet.contains(Date[].class)) { - classSet.remove(Calendar[].class); - } - - if (classSet.contains(URI[].class)) { - classSet.remove(UUID[].class); - } - - if (classSet.contains(Source[].class)) { - classSet.remove(Image[].class); - classSet.remove(DataHandler[].class); - } - - if(classSet.isEmpty()) { - return defaultContext; - } - - // For single class - if (classSet.size() == 1) { - return getJAXBContext(classSet.iterator().next()); - } - synchronized (cache) { - JAXBContext context = cache.get(classSet); - if (context != null) { - return context; - } - context = JAXBContext.newInstance(classSet.toArray(new Class<?>[classSet.size()])); - cache.put(classSet, context); - return context; - } - } - - public void clear() { - synchronized (cache) { - cache.clear(); - } - synchronized (upool) { - upool.clear(); - } - synchronized (upool) { - upool.clear(); - } - } - -} |