/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 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,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package com.sun.xml.internal.bind.v2.model.annotation;

import java.lang.annotation.Annotation;

import java.lang.reflect.Field;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.lang.reflect.Type;

import java.util.HashMap;

import java.util.Map;

/**

 * {@link AnnotationReader} that uses {@code java.lang.reflect} to

 * read annotations from class files.

 *

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

 */

public final class RuntimeInlineAnnotationReader extends AbstractInlineAnnotationReaderImpl<Type,Class,Field,Method>

    implements RuntimeAnnotationReader {

    public <A extends Annotation> A getFieldAnnotation(Class<A> annotation, Field field, Locatable srcPos) {

        return LocatableAnnotation.create(field.getAnnotation(annotation),srcPos);

    }

    public boolean hasFieldAnnotation(Class<? extends Annotation> annotationType, Field field) {

        return field.isAnnotationPresent(annotationType);

    }

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

        return clazz.isAnnotationPresent(annotationType);

    }

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

        Annotation[] r = field.getAnnotations();

        for( int i=0; i<r.length; i++ ) {

            r[i] = LocatableAnnotation.create(r[i],srcPos);

        }

        return r;

    }

    public <A extends Annotation> A getMethodAnnotation(Class<A> annotation, Method method, Locatable srcPos) {

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

    }

    public boolean hasMethodAnnotation(Class<? extends Annotation> annotation, Method method) {

        return method.isAnnotationPresent(annotation);

    }

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

        Annotation[] r = method.getAnnotations();

        for( int i=0; i<r.length; i++ ) {

            r[i] = LocatableAnnotation.create(r[i],srcPos);

        }

        return r;

    }

    public <A extends Annotation> A getMethodParameterAnnotation(Class<A> annotation, Method method, int paramIndex, Locatable srcPos) {

        Annotation[] pa = method.getParameterAnnotations()[paramIndex];

        for( Annotation a : pa ) {

            if(a.annotationType()==annotation)

                return LocatableAnnotation.create((A)a,srcPos);

        }

        return null;

    }

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

        return LocatableAnnotation.create(((Class<?>)clazz).getAnnotation(a),srcPos);

    }

    /**

     * Cache for package-level annotations.

     */

    private final Map<Class<? extends Annotation>,Map<Package,Annotation>> packageCache =

            new HashMap<Class<? extends Annotation>,Map<Package,Annotation>>();

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

        Package p = clazz.getPackage();

        if(p==null) return null;

        Map<Package,Annotation> cache = packageCache.get(a);

        if(cache==null) {

            cache = new HashMap<Package,Annotation>();

            packageCache.put(a,cache);

        }

        if(cache.containsKey(p))

            return (A)cache.get(p);

        else {

            A ann = LocatableAnnotation.create(p.getAnnotation(a),srcPos);

            cache.put(p,ann);

            return ann;

        }

    }

    public Class getClassValue(Annotation a, String name) {

        try {

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

        } catch (IllegalAccessException e) {

            // impossible

            throw new IllegalAccessError(e.getMessage());

        } catch (InvocationTargetException e) {

            // impossible

            throw new InternalError(Messages.CLASS_NOT_FOUND.format(a.annotationType(), e.getMessage()));

        } catch (NoSuchMethodException e) {

            throw new NoSuchMethodError(e.getMessage());

        }

    }

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

        try {

            return (Class[])a.annotationType().getMethod(name).invoke(a);

        } catch (IllegalAccessException e) {

            // impossible

            throw new IllegalAccessError(e.getMessage());

        } catch (InvocationTargetException e) {

            // impossible

            throw new InternalError(e.getMessage());

        } catch (NoSuchMethodException e) {

            throw new NoSuchMethodError(e.getMessage());

        }

    }

    protected String fullName(Method m) {

        return m.getDeclaringClass().getName()+'#'+m.getName();

    }

}