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 * published by the Free Software Foundation.  Oracle designates this

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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

 * 2 along with this work; if not, write to the Free Software Foundation,

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package com.sun.tools.internal.jxc.ap;

import java.lang.annotation.Annotation;

import java.lang.reflect.InvocationTargetException;

import java.util.ArrayList;

import java.util.Collection;

import java.util.List;

import javax.lang.model.element.AnnotationMirror;

import javax.lang.model.element.Element;

import javax.lang.model.element.ExecutableElement;

import javax.lang.model.element.TypeElement;

import javax.lang.model.element.VariableElement;

import javax.lang.model.type.MirroredTypeException;

import javax.lang.model.type.MirroredTypesException;

import javax.lang.model.type.TypeMirror;

import com.sun.xml.internal.bind.v2.model.annotation.AbstractInlineAnnotationReaderImpl;

import com.sun.xml.internal.bind.v2.model.annotation.AnnotationReader;

import com.sun.xml.internal.bind.v2.model.annotation.Locatable;

import com.sun.xml.internal.bind.v2.model.annotation.LocatableAnnotation;

/**

 * {@link AnnotationReader} implementation that reads annotation inline from Annoation Processing.

 *

 * @author Kohsuke Kawaguchi (kk@kohsuke.org)

 */

public final class InlineAnnotationReaderImpl extends AbstractInlineAnnotationReaderImpl<TypeMirror, TypeElement, VariableElement, ExecutableElement> {

    /** The singleton instance. */

    public static final InlineAnnotationReaderImpl theInstance = new InlineAnnotationReaderImpl();

    private InlineAnnotationReaderImpl() {}

    public <A extends Annotation> A getClassAnnotation(Class<A> a, TypeElement clazz, Locatable srcPos) {

        return LocatableAnnotation.create(clazz.getAnnotation(a),srcPos);

    }

    public <A extends Annotation> A getFieldAnnotation(Class<A> a, VariableElement f, Locatable srcPos) {

        return LocatableAnnotation.create(f.getAnnotation(a),srcPos);

    }

    public boolean hasFieldAnnotation(Class<? extends Annotation> annotationType, VariableElement f) {

        return f.getAnnotation(annotationType)!=null;

    }

    public boolean hasClassAnnotation(TypeElement clazz, Class<? extends Annotation> annotationType) {

        return clazz.getAnnotation(annotationType)!=null;

    }

    public Annotation[] getAllFieldAnnotations(VariableElement field, Locatable srcPos) {

        return getAllAnnotations(field,srcPos);

    }

    public <A extends Annotation> A getMethodAnnotation(Class<A> a, ExecutableElement method, Locatable srcPos) {

        return LocatableAnnotation.create(method.getAnnotation(a),srcPos);

    }

    public boolean hasMethodAnnotation(Class<? extends Annotation> a, ExecutableElement method) {

        return method.getAnnotation(a)!=null;

    }

    public Annotation[] getAllMethodAnnotations(ExecutableElement method, Locatable srcPos) {

        return getAllAnnotations(method,srcPos);

    }

    /**

     * Gets all the annotations on the given declaration.

     */

    private Annotation[] getAllAnnotations(Element decl, Locatable srcPos) {

        List<Annotation> r = new ArrayList<Annotation>();

        for( AnnotationMirror m : decl.getAnnotationMirrors() ) {

            try {

                String fullName = ((TypeElement) m.getAnnotationType().asElement()).getQualifiedName().toString();

                Class<? extends Annotation> type =

                    SecureLoader.getClassClassLoader(getClass()).loadClass(fullName).asSubclass(Annotation.class);

                Annotation annotation = decl.getAnnotation(type);

                if(annotation!=null)

                    r.add( LocatableAnnotation.create(annotation,srcPos) );

            } catch (ClassNotFoundException e) {

                // just continue

            }

        }

        return r.toArray(new Annotation[r.size()]);

    }

    public <A extends Annotation> A getMethodParameterAnnotation(Class<A> a, ExecutableElement m, int paramIndex, Locatable srcPos) {

        VariableElement[] params = m.getParameters().toArray(new VariableElement[m.getParameters().size()]);

        return LocatableAnnotation.create(

            params[paramIndex].getAnnotation(a), srcPos );

    }

    public <A extends Annotation> A getPackageAnnotation(Class<A> a, TypeElement clazz, Locatable srcPos) {

        return LocatableAnnotation.create(clazz.getEnclosingElement().getAnnotation(a), srcPos);

    }

    public TypeMirror getClassValue(Annotation a, String name) {

        try {

            a.annotationType().getMethod(name).invoke(a);

            assert false;

            throw new IllegalStateException("should throw a MirroredTypeException");

        } catch (IllegalAccessException e) {

            throw new IllegalAccessError(e.getMessage());

        } catch (InvocationTargetException e) {

            if( e.getCause() instanceof MirroredTypeException ) {

                MirroredTypeException me = (MirroredTypeException)e.getCause();

                return me.getTypeMirror();

            }

            // impossible

            throw new RuntimeException(e);

        } catch (NoSuchMethodException e) {

            throw new NoSuchMethodError(e.getMessage());

        }

    }

    public TypeMirror[] getClassArrayValue(Annotation a, String name) {

        try {

            a.annotationType().getMethod(name).invoke(a);

            assert false;

            throw new IllegalStateException("should throw a MirroredTypesException");

        } catch (IllegalAccessException e) {

            throw new IllegalAccessError(e.getMessage());

        } catch (InvocationTargetException e) {

            if( e.getCause() instanceof MirroredTypesException ) {

                MirroredTypesException me = (MirroredTypesException)e.getCause();

                Collection<? extends TypeMirror> r = me.getTypeMirrors();

                return r.toArray(new TypeMirror[r.size()]);

            }

            // *********************** TODO: jdk6 bug. Fixed in java7

            // According to the javadocs it should throw the MirroredTypesException

            if( e.getCause() instanceof MirroredTypeException ) {

                MirroredTypeException me = (MirroredTypeException)e.getCause();

                TypeMirror tr = me.getTypeMirror();

                TypeMirror[] trArr = new TypeMirror[1];

                trArr[0] = tr;

                return trArr;

            }

            // *******************************************

            // impossible

            throw new RuntimeException(e);

        } catch (NoSuchMethodException e) {

            throw new NoSuchMethodError(e.getMessage());

        }

    }

    protected String fullName(ExecutableElement m) {

        return ((TypeElement) m.getEnclosingElement()).getQualifiedName().toString()+'#'+m.getSimpleName();

    }

}