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 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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package com.sun.xml.internal.bind.v2.runtime.reflect.opt;

import java.lang.reflect.Field;

import java.lang.reflect.Modifier;

import java.lang.reflect.Type;

import java.util.HashMap;

import java.util.Map;

import java.util.logging.Level;

import java.util.logging.Logger;

import com.sun.xml.internal.bind.Util;

import com.sun.xml.internal.bind.v2.model.core.TypeInfo;

import com.sun.xml.internal.bind.v2.model.runtime.RuntimeClassInfo;

import com.sun.xml.internal.bind.v2.model.runtime.RuntimePropertyInfo;

import com.sun.xml.internal.bind.v2.runtime.reflect.Accessor;

import com.sun.xml.internal.bind.v2.runtime.reflect.TransducedAccessor;

import static com.sun.xml.internal.bind.v2.bytecode.ClassTailor.toVMClassName;

/**

 * Prepares optimized {@link TransducedAccessor} from templates.

 *

 * @author Kohsuke Kawaguchi

 */

public abstract class OptimizedTransducedAccessorFactory {

    private OptimizedTransducedAccessorFactory() {} // no instanciation please

    // http://java.sun.com/docs/books/vmspec/2nd-edition/html/ConstantPool.doc.html#75929

    // "same runtime package"

    private static final Logger logger = Util.getClassLogger();

    private static final String fieldTemplateName;

    private static final String methodTemplateName;

    static {

        String s = TransducedAccessor_field_Byte.class.getName();

        fieldTemplateName = s.substring(0,s.length()-"Byte".length()).replace('.','/');

        s = TransducedAccessor_method_Byte.class.getName();

        methodTemplateName = s.substring(0,s.length()-"Byte".length()).replace('.','/');

    }

    /**

     * Gets the optimized {@link TransducedAccessor} if possible.

     *

     * @return null

     *      if for some reason it fails to create an optimized version.

     */

    public static final TransducedAccessor get(RuntimePropertyInfo prop) {

        Accessor acc = prop.getAccessor();

        // consider using an optimized TransducedAccessor implementations.

        Class opt=null;

        TypeInfo<Type,Class> parent = prop.parent();

        if(!(parent instanceof RuntimeClassInfo))

            return null;

        Class dc = ((RuntimeClassInfo)parent).getClazz();

        String newClassName = toVMClassName(dc)+"_JaxbXducedAccessor_"+prop.getName();

        if(acc instanceof Accessor.FieldReflection) {

            // TODO: we also need to make sure that the default xducer is used.

            Accessor.FieldReflection racc = (Accessor.FieldReflection) acc;

            Field field = racc.f;

            int mods = field.getModifiers();

            if(Modifier.isPrivate(mods) || Modifier.isFinal(mods))

                // we can't access private fields.

                // TODO: think about how to improve this case

                return null;

            Class<?> t = field.getType();

            if(t.isPrimitive())

                opt = AccessorInjector.prepare( dc,

                    fieldTemplateName+suffixMap.get(t),

                    newClassName,

                    toVMClassName(Bean.class),

                    toVMClassName(dc),

                    "f_"+t.getName(),

                    field.getName() );

        }

        if(acc.getClass()==Accessor.GetterSetterReflection.class) {

            Accessor.GetterSetterReflection gacc = (Accessor.GetterSetterReflection) acc;

            if(gacc.getter==null || gacc.setter==null)

                return null;    // incomplete

            Class<?> t = gacc.getter.getReturnType();

            if(Modifier.isPrivate(gacc.getter.getModifiers())

            || Modifier.isPrivate(gacc.setter.getModifiers()))

                // we can't access private methods.

                return null;

            if(t.isPrimitive())

                opt = AccessorInjector.prepare( dc,

                    methodTemplateName+suffixMap.get(t),

                    newClassName,

                    toVMClassName(Bean.class),

                    toVMClassName(dc),

                    "get_"+t.getName(),

                    gacc.getter.getName(),

                    "set_"+t.getName(),

                    gacc.setter.getName());

        }

        if(opt==null)

            return null;

        logger.log(Level.FINE,"Using optimized TransducedAccessor for "+prop.displayName());

        try {

            return (TransducedAccessor)opt.newInstance();

        } catch (InstantiationException e) {

            logger.log(Level.INFO,"failed to load an optimized TransducedAccessor",e);

        } catch (IllegalAccessException e) {

            logger.log(Level.INFO,"failed to load an optimized TransducedAccessor",e);

        } catch (SecurityException e) {

            logger.log(Level.INFO,"failed to load an optimized TransducedAccessor",e);

        }

        return null;

    }

    private static final Map<Class,String> suffixMap = new HashMap<Class, String>();

    static {

        suffixMap.put(Byte.TYPE,"Byte");

        suffixMap.put(Short.TYPE,"Short");

        suffixMap.put(Integer.TYPE,"Integer");

        suffixMap.put(Long.TYPE,"Long");

        suffixMap.put(Boolean.TYPE,"Boolean");

        suffixMap.put(Float.TYPE,"Float");

        suffixMap.put(Double.TYPE,"Double");

    }

}