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Merge jboss-proxy with invocation-api to get jboss-invocation
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| Original file line number | Diff line number | Diff line change |
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| /.idea | ||
| *.iml | ||
| target | ||
| .prject | ||
| .project | ||
| .settings | ||
| .classpath |
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151 changes: 151 additions & 0 deletions
151
src/main/java/org/jboss/invocation/proxy/AbstractClassFactory.java
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| /* | ||
| * JBoss, Home of Professional Open Source | ||
| * Copyright 2010, Red Hat Inc., and individual contributors as indicated | ||
| * by the @authors tag. See the copyright.txt in the distribution for a | ||
| * full listing of individual contributors. | ||
| * | ||
| * This is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU Lesser General Public License as | ||
| * published by the Free Software Foundation; either version 2.1 of | ||
| * the License, or (at your option) any later version. | ||
| * | ||
| * This software is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public | ||
| * License along with this software; if not, write to the Free | ||
| * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | ||
| * 02110-1301 USA, or see the FSF site: http://www.fsf.org. | ||
| */ | ||
|
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| package org.jboss.invocation.proxy; | ||
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| import java.security.ProtectionDomain; | ||
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| import org.jboss.classfilewriter.ClassFile; | ||
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| /** | ||
| * Base class for all class factories. | ||
| * <p> | ||
| * Sub classes should override {@link #generateClass()} to perform the actual class generation. The class will only be generated | ||
| * once at most | ||
| * | ||
| * @author Stuart Douglas | ||
| * | ||
| */ | ||
| public abstract class AbstractClassFactory<T> { | ||
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| /** | ||
| * The name of the generated class | ||
| */ | ||
| private final String className; | ||
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| /** | ||
| * superclass of the generated class | ||
| */ | ||
| private final Class<T> superClass; | ||
|
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| /** | ||
| * The class loader that is used to load the class | ||
| */ | ||
| private final ClassLoader classLoader; | ||
|
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| /** | ||
| * The ProtectionDomain that the generated class will be definied in | ||
| */ | ||
| private final ProtectionDomain protectionDomain; | ||
|
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| /** | ||
| * The class object for the generated class | ||
| */ | ||
| private volatile Class<? extends T> generatedClass; | ||
|
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| /** | ||
| * The class file that is used to generate the class. | ||
| * <p> | ||
| * Note that this object is not thread safe, so care should be taken by subclasses to ensure that no more than one thread | ||
| * accesses this at once. In normal use this should not be an issue, as {@link #defineClass()} will only be called once by a | ||
| * single thread. | ||
| * <p> | ||
| * This is set to null after the class is generated | ||
| */ | ||
| protected ClassFile classFile; | ||
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| public AbstractClassFactory(String className, Class<T> superClass, ClassLoader classLoader, | ||
| ProtectionDomain protectionDomain) { | ||
| this.className = className; | ||
| this.superClass = superClass; | ||
| this.classLoader = classLoader; | ||
| this.protectionDomain = protectionDomain; | ||
| this.classFile = new ClassFile(className, superClass.getName()); | ||
| } | ||
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| public AbstractClassFactory(String className, Class<T> superClass, ClassLoader classLoader) { | ||
| this(className, superClass, classLoader, null); | ||
| } | ||
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| public AbstractClassFactory(String className, Class<T> superClass) { | ||
| this(className, superClass, superClass.getClassLoader(), null); | ||
| } | ||
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| protected abstract void generateClass(); | ||
|
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| /** | ||
| * Cleans up any resources left over from generating the class. Implementors should ensure they call super.cleanup(); | ||
| */ | ||
| protected abstract void cleanup(); | ||
|
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| /** | ||
| * Returns the {@link Class} object for the generated class, creating it if it does not exist | ||
| * | ||
| */ | ||
| public Class<? extends T> defineClass() { | ||
| if (generatedClass == null) { | ||
| synchronized (this) { | ||
| if (generatedClass == null) { | ||
| generateClass(); | ||
| if (protectionDomain == null) { | ||
| generatedClass = (Class<? extends T>)classFile.define(classLoader); | ||
| } else { | ||
| generatedClass = (Class<? extends T>)classFile.define(classLoader, protectionDomain); | ||
| } | ||
| cleanup(); | ||
| classFile = null; | ||
| } | ||
| } | ||
| } | ||
| return generatedClass; | ||
| } | ||
|
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| /** | ||
| * Creates a new instance of the generated class by invoking the default constructor. | ||
| * <p> | ||
| * If the generated class has not been defined it will be created | ||
| * | ||
| */ | ||
| public T newInstance() throws InstantiationException, IllegalAccessException { | ||
| return defineClass().newInstance(); | ||
| } | ||
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| public String getClassName() { | ||
| return className; | ||
| } | ||
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| public String getSuperClassName() { | ||
| return superClass.getName(); | ||
| } | ||
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| public Class<T> getSuperClass() { | ||
| return superClass; | ||
| } | ||
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| public ClassLoader getClassLoader() { | ||
| return classLoader; | ||
| } | ||
|
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| public ProtectionDomain getProtectionDomain() { | ||
| return protectionDomain; | ||
| } | ||
| } |
112 changes: 112 additions & 0 deletions
112
src/main/java/org/jboss/invocation/proxy/AbstractProxyFactory.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| /* | ||
| * JBoss, Home of Professional Open Source | ||
| * Copyright 2010, Red Hat Inc., and individual contributors as indicated | ||
| * by the @authors tag. See the copyright.txt in the distribution for a | ||
| * full listing of individual contributors. | ||
| * | ||
| * This is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU Lesser General Public License as | ||
| * published by the Free Software Foundation; either version 2.1 of | ||
| * the License, or (at your option) any later version. | ||
| * | ||
| * This software is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public | ||
| * License along with this software; if not, write to the Free | ||
| * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | ||
| * 02110-1301 USA, or see the FSF site: http://www.fsf.org. | ||
| */ | ||
|
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| package org.jboss.invocation.proxy; | ||
|
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| import java.lang.reflect.Method; | ||
| import java.security.ProtectionDomain; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
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| import org.jboss.classfilewriter.AccessFlag; | ||
| import org.jboss.classfilewriter.ClassMethod; | ||
| import org.jboss.classfilewriter.code.CodeAttribute; | ||
| import org.jboss.invocation.MethodIdentifier; | ||
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| public abstract class AbstractProxyFactory<T> extends AbstractSubclassFactory<T> { | ||
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| private static final String METHOD_IDENTIFIER_FIELD_PREFIX = "METHOD$$IDENTIFIER"; | ||
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| private static final String METHID_IDENTIFIER_FIELD_DESCRIPTOR = "Lorg/jboss/invocation/MethodIdentifier;"; | ||
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| private final Map<Method, String> methodIdentifiers = new HashMap<Method, String>(); | ||
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| private int identifierCount = 0; | ||
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| private ClassMethod staticConstructor; | ||
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| public AbstractProxyFactory(String className, Class<T> superClass, ClassLoader classLoader) { | ||
| super(className, superClass, classLoader); | ||
| staticConstructor = classFile.addMethod(AccessFlag.of(AccessFlag.PUBLIC, AccessFlag.STATIC), "<clinit>", "V"); | ||
| } | ||
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| public AbstractProxyFactory(String className, Class<T> superClass, ClassLoader classLoader, | ||
| ProtectionDomain protectionDomain) { | ||
| super(className, superClass, classLoader, protectionDomain); | ||
| staticConstructor = classFile.addMethod(AccessFlag.of(AccessFlag.PUBLIC, AccessFlag.STATIC), "<clinit>", "V"); | ||
| } | ||
|
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| public AbstractProxyFactory(String className, Class<T> superClass) { | ||
| super(className, superClass); | ||
| staticConstructor = classFile.addMethod(AccessFlag.of(AccessFlag.PUBLIC, AccessFlag.STATIC), "<clinit>", "V"); | ||
| } | ||
|
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| /** | ||
| * This method must be called by subclasses after they have finished generating the class | ||
| */ | ||
| protected void finalizeStaticConstructor() { | ||
| staticConstructor.getCodeAttribute().returnInstruction(); | ||
| } | ||
|
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| @Override | ||
| protected void cleanup() { | ||
| staticConstructor = null; | ||
| super.cleanup(); | ||
| } | ||
|
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| /** | ||
| * Writes the bytecode to load an instance of MethodIdentifier for the given method onto the stack. | ||
| * <p> | ||
| * If loadMethodIdentifier has not already been called for the given identifier then a static field to hold the identifier | ||
| * is added to the class, and code is added to the static constructor to initalize the field to the correct MethodIdentifier | ||
| * | ||
| */ | ||
| protected void loadMethodIdentifier(Method methodToLoad, ClassMethod method) { | ||
| if (!methodIdentifiers.containsKey(methodToLoad)) { | ||
| int identifierNo = identifierCount++; | ||
| String fieldName = METHOD_IDENTIFIER_FIELD_PREFIX + identifierNo; | ||
| classFile.addField(AccessFlag.PRIVATE | AccessFlag.STATIC, fieldName, MethodIdentifier.class); | ||
| methodIdentifiers.put(methodToLoad, fieldName); | ||
| // we need to create the method identifier in the static constructor | ||
| CodeAttribute ca = staticConstructor.getCodeAttribute(); | ||
| //push the method return type onto the stack | ||
| ca.ldc(methodToLoad.getReturnType().getName()); | ||
| // push the method name onto the stack | ||
| ca.ldc(methodToLoad.getName()); | ||
| Class<?>[] parameters = methodToLoad.getParameterTypes(); | ||
| // now we need a new array | ||
| ca.iconst(parameters.length); | ||
| ca.anewarray(String.class.getName()); | ||
| for (int i = 0; i < parameters.length; ++i) { | ||
| ca.dup(); //dup the array | ||
| ca.iconst(i); //the array index to store it | ||
| ca.ldc(parameters[i].getName()); | ||
| ca.aastore(); | ||
| } | ||
| ca.invokestatic(MethodIdentifier.class.getName(), "getIdentifier", "(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;)Lorg/jboss/invocation/MethodIdentifier;"); | ||
| ca.putstatic(getClassName(), fieldName, METHID_IDENTIFIER_FIELD_DESCRIPTOR); | ||
| } | ||
| String fieldName = methodIdentifiers.get(methodToLoad); | ||
| method.getCodeAttribute().getstatic(getClassName(), fieldName, METHID_IDENTIFIER_FIELD_DESCRIPTOR); | ||
| } | ||
|
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| } |
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