ohair@286: /*
mkos@408:  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
ohair@286:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ohair@286:  *
ohair@286:  * This code is free software; you can redistribute it and/or modify it
ohair@286:  * under the terms of the GNU General Public License version 2 only, as
ohair@286:  * published by the Free Software Foundation.  Oracle designates this
ohair@286:  * particular file as subject to the "Classpath" exception as provided
ohair@286:  * by Oracle in the LICENSE file that accompanied this code.
ohair@286:  *
ohair@286:  * This code is distributed in the hope that it will be useful, but WITHOUT
ohair@286:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ohair@286:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ohair@286:  * version 2 for more details (a copy is included in the LICENSE file that
ohair@286:  * accompanied this code).
ohair@286:  *
ohair@286:  * You should have received a copy of the GNU General Public License version
ohair@286:  * 2 along with this work; if not, write to the Free Software Foundation,
ohair@286:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ohair@286:  *
ohair@286:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@286:  * or visit www.oracle.com if you need additional information or have any
ohair@286:  * questions.
ohair@286:  */
ohair@286: 
ohair@286: package com.sun.xml.internal.bind.v2.runtime.reflect.opt;
ohair@286: 
ohair@286: import java.lang.reflect.Field;
ohair@286: import java.lang.reflect.Method;
ohair@286: import java.lang.reflect.Modifier;
ohair@286: import java.util.logging.Level;
ohair@286: import java.util.logging.Logger;
ohair@286: 
ohair@286: import com.sun.xml.internal.bind.Util;
ohair@286: import com.sun.xml.internal.bind.v2.runtime.reflect.Accessor;
ohair@286: import com.sun.xml.internal.bind.v2.runtime.RuntimeUtil;
ohair@286: 
ohair@286: import static com.sun.xml.internal.bind.v2.bytecode.ClassTailor.toVMClassName;
ohair@286: import static com.sun.xml.internal.bind.v2.bytecode.ClassTailor.toVMTypeName;
ohair@286: 
ohair@286: /**
ohair@286:  * @author Kohsuke Kawaguchi
ohair@286:  */
ohair@286: public abstract class OptimizedAccessorFactory {
ohair@286:     private OptimizedAccessorFactory() {} // no instanciation please
ohair@286: 
ohair@286:     private static final Logger logger = Util.getClassLogger();
ohair@286: 
ohair@286: 
ohair@286:     private static final String fieldTemplateName;
ohair@286:     private static final String methodTemplateName;
ohair@286: 
ohair@286:     static {
ohair@286:         String s = FieldAccessor_Byte.class.getName();
ohair@286:         fieldTemplateName = s.substring(0,s.length()-"Byte".length()).replace('.','/');
ohair@286: 
ohair@286:         s = MethodAccessor_Byte.class.getName();
ohair@286:         methodTemplateName = s.substring(0,s.length()-"Byte".length()).replace('.','/');
ohair@286:     }
ohair@286: 
ohair@286:     /**
ohair@286:      * Gets the optimized {@link Accessor} that accesses the given getter/setter.
ohair@286:      *
ohair@286:      * @return null
ohair@286:      *      if for some reason it fails to create an optimized version.
ohair@286:      */
ohair@286:     public static final <B,V> Accessor<B,V> get(Method getter, Method setter) {
ohair@286:         // make sure the method signatures are what we expect
ohair@286:         if(getter.getParameterTypes().length!=0)
ohair@286:             return null;
ohair@286:         Class<?>[] sparams = setter.getParameterTypes();
ohair@286:         if(sparams.length!=1)
ohair@286:             return null;
ohair@286:         if(sparams[0]!=getter.getReturnType())
ohair@286:             return null;
ohair@286:         if(setter.getReturnType()!=Void.TYPE)
ohair@286:             return null;
ohair@286:         if(getter.getDeclaringClass()!=setter.getDeclaringClass())
ohair@286:             return null;
ohair@286:         if(Modifier.isPrivate(getter.getModifiers()) || Modifier.isPrivate(setter.getModifiers()))
ohair@286:             // we can't access private fields
ohair@286:             return null;
ohair@286: 
ohair@286:         Class t = sparams[0];
ohair@286:         String typeName = t.getName().replace('.','_');
ohair@286:         if (t.isArray()) {
ohair@286:             typeName = "AOf_";
ohair@286:             String compName = t.getComponentType().getName().replace('.','_');
ohair@286:             while (compName.startsWith("[L")) {
ohair@286:                 compName = compName.substring(2);
ohair@286:                 typeName += "AOf_";
ohair@286:             }
ohair@286:             typeName = typeName + compName;
ohair@286:         }
ohair@286: 
ohair@286:         String newClassName = toVMClassName(getter.getDeclaringClass())+"$JaxbAccessorM_"+getter.getName()+'_'+setter.getName()+'_'+typeName;
ohair@286:         Class opt;
ohair@286: 
ohair@286:         if(t.isPrimitive())
ohair@286:             opt = AccessorInjector.prepare( getter.getDeclaringClass(),
ohair@286:                 methodTemplateName+RuntimeUtil.primitiveToBox.get(t).getSimpleName(),
ohair@286:                 newClassName,
ohair@286:                 toVMClassName(Bean.class),
ohair@286:                 toVMClassName(getter.getDeclaringClass()),
ohair@286:                 "get_"+t.getName(),
ohair@286:                 getter.getName(),
ohair@286:                 "set_"+t.getName(),
ohair@286:                 setter.getName());
ohair@286:         else
ohair@286:             opt = AccessorInjector.prepare( getter.getDeclaringClass(),
ohair@286:                 methodTemplateName+"Ref",
ohair@286:                 newClassName,
ohair@286:                 toVMClassName(Bean.class),
ohair@286:                 toVMClassName(getter.getDeclaringClass()),
ohair@286:                 toVMClassName(Ref.class),
ohair@286:                 toVMClassName(t),
ohair@286:                 "()"+toVMTypeName(Ref.class),
ohair@286:                 "()"+toVMTypeName(t),
ohair@286:                 '('+toVMTypeName(Ref.class)+")V",
ohair@286:                 '('+toVMTypeName(t)+")V",
ohair@286:                 "get_ref",
ohair@286:                 getter.getName(),
ohair@286:                 "set_ref",
ohair@286:                 setter.getName());
ohair@286: 
ohair@286:         if(opt==null)
ohair@286:             return null;
ohair@286: 
ohair@286:         Accessor<B,V> acc = instanciate(opt);
mkos@408:         if (acc!=null) {
mkos@408:             if (logger.isLoggable(Level.FINE)) {
mkos@408:                 logger.log(Level.FINE, "Using optimized Accessor for {0} and {1}", new Object[]{getter, setter});
mkos@408:             }
mkos@408:         }
ohair@286:         return acc;
ohair@286:     }
ohair@286: 
ohair@286: 
ohair@286:     /**
alanb@368:      * Gets the optimized {@link Accessor} that accesses the given field.
ohair@286:      *
ohair@286:      * @return null
ohair@286:      *      if for some reason it fails to create an optimized version.
ohair@286:      */
ohair@286:     public static final <B,V> Accessor<B,V> get(Field field) {
ohair@286:         int mods = field.getModifiers();
ohair@286:         if(Modifier.isPrivate(mods) || Modifier.isFinal(mods))
ohair@286:             // we can't access private fields
ohair@286:             return null;
ohair@286: 
ohair@286:         String newClassName = toVMClassName(field.getDeclaringClass())+"$JaxbAccessorF_"+field.getName();
ohair@286: 
ohair@286:         Class opt;
ohair@286: 
ohair@286:         if(field.getType().isPrimitive())
ohair@286:             opt = AccessorInjector.prepare( field.getDeclaringClass(),
ohair@286:                 fieldTemplateName+RuntimeUtil.primitiveToBox.get(field.getType()).getSimpleName(),
ohair@286:                 newClassName,
ohair@286:                 toVMClassName(Bean.class),
ohair@286:                 toVMClassName(field.getDeclaringClass()),
ohair@286:                 "f_"+field.getType().getName(),
ohair@286:                 field.getName() );
ohair@286:         else
ohair@286:             opt = AccessorInjector.prepare( field.getDeclaringClass(),
ohair@286:                 fieldTemplateName+"Ref",
ohair@286:                 newClassName,
ohair@286:                 toVMClassName(Bean.class),
ohair@286:                 toVMClassName(field.getDeclaringClass()),
ohair@286:                 toVMClassName(Ref.class),
ohair@286:                 toVMClassName(field.getType()),
ohair@286:                 toVMTypeName(Ref.class),
ohair@286:                 toVMTypeName(field.getType()),
ohair@286:                 "f_ref",
ohair@286:                 field.getName() );
ohair@286: 
ohair@286:         if(opt==null)
ohair@286:             return null;
ohair@286: 
ohair@286:         Accessor<B,V> acc = instanciate(opt);
mkos@408:         if (acc!=null) {
mkos@408:             if (logger.isLoggable(Level.FINE)) {
mkos@408:                 logger.log(Level.FINE, "Using optimized Accessor for {0}", field);
mkos@408:             }
mkos@408:         }
ohair@286:         return acc;
ohair@286:     }
ohair@286: 
ohair@286:     private static <B,V> Accessor<B,V> instanciate(Class opt) {
ohair@286:         try {
ohair@286:             return (Accessor<B,V>)opt.newInstance();
ohair@286:         } catch (InstantiationException e) {
ohair@286:             logger.log(Level.INFO,"failed to load an optimized Accessor",e);
ohair@286:         } catch (IllegalAccessException e) {
ohair@286:             logger.log(Level.INFO,"failed to load an optimized Accessor",e);
ohair@286:         } catch (SecurityException e) {
ohair@286:             logger.log(Level.INFO,"failed to load an optimized Accessor",e);
ohair@286:         }
ohair@286:         return null;
ohair@286:     }
ohair@286: }