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