BEGIN LICENSE BLOCK *****
Version: EPL 2.0/GPL 2.0/LGPL 2.1
The contents of this file are subject to the Eclipse Public
License Version 2.0 (the "License"); you may not use this file
except in compliance with the License. You may obtain a copy of
the License at http://www.eclipse.org/legal/epl-v20.html
Software distributed under the License is distributed on an "AS
IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
implied. See the License for the specific language governing
rights and limitations under the License.
Copyright (C) 2004 Stefan Matthias Aust 
Copyright (C) 2004 David Corbin 
Alternatively, the contents of this file may be used under the terms of
either of the GNU General Public License Version 2 or later (the "GPL"),
or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the EPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the EPL, the GPL or the LGPL.
END LICENSE BLOCK /***** BEGIN LICENSE BLOCK *****
 * Version: EPL 2.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Eclipse Public
 * License Version 2.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/epl-v20.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
 * Copyright (C) 2004 David Corbin <dcorbin@users.sourceforge.net>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the EPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the EPL, the GPL or the LGPL.
 ***** END LICENSE BLOCK *****/

package org.jruby.javasupport;

import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Member;

import org.jruby.Ruby;
import org.jruby.RubyBoolean;
import org.jruby.RubyClass;
import org.jruby.RubyFixnum;
import org.jruby.RubyObject;
import org.jruby.RubyString;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.builtin.IRubyObject;

public abstract class JavaAccessibleObject extends RubyObject {

    protected JavaAccessibleObject(Ruby runtime, RubyClass rubyClass) {
        super(runtime, rubyClass);
    }

    public static void registerRubyMethods(Ruby runtime, RubyClass result) {
        result.defineAnnotatedMethods(JavaAccessibleObject.class);
    }

    public abstract AccessibleObject accessibleObject();

    public boolean equals(final Object other) {
        if ( this == other ) return true;
        return other instanceof JavaAccessibleObject &&
            this.accessibleObject().equals( ((JavaAccessibleObject) other).accessibleObject() );
    }

    boolean same(final JavaAccessibleObject that) {
        if ( this == that ) return true;
        return this.accessibleObject() == that.accessibleObject();
    }

    public int hashCode() {
        return accessibleObject().hashCode();
    }

    @JRubyMethod
    public RubyFixnum hash() {
        return getRuntime().newFixnum(hashCode());
    }

    @JRubyMethod(name = {"==", "eql?"})
    public RubyBoolean op_equal(final IRubyObject other) {
        return RubyBoolean.newBoolean(getRuntime(), equals(other));
    }

    @JRubyMethod(name = "equal?")
    public RubyBoolean same(final IRubyObject other) {
        final boolean same = other instanceof JavaAccessibleObject && same((JavaAccessibleObject) other);
        return same ? getRuntime().getTrue() : getRuntime().getFalse();
    }

    @JRubyMethod(name = "accessible?")
    public RubyBoolean isAccessible() {
        return RubyBoolean.newBoolean(getRuntime(), accessibleObject().isAccessible());
    }

    @JRubyMethod(name = "accessible=")
    public IRubyObject setAccessible(IRubyObject object) {
        accessibleObject().setAccessible(object.isTrue());
        return object;
    }

    @SuppressWarnings("unchecked")
    @JRubyMethod
    public IRubyObject annotation(final IRubyObject annoClass) {
        if ( ! ( annoClass instanceof JavaClass ) ) {
            throw getRuntime().newTypeError(annoClass, getRuntime().getJavaSupport().getJavaClassClass());
        }
        final Class annotation = ((JavaClass) annoClass).javaClass();
        return Java.getInstance(getRuntime(), accessibleObject().getAnnotation(annotation));
    }

    @JRubyMethod
    public IRubyObject annotations() {
        return Java.getInstance(getRuntime(), accessibleObject().getAnnotations());
    }

    @JRubyMethod(name = "annotations?")
    public RubyBoolean annotations_p() {
        return getRuntime().newBoolean(accessibleObject().getAnnotations().length > 0);
    }

    @JRubyMethod
    public IRubyObject declared_annotations() {
        return Java.getInstance(getRuntime(), accessibleObject().getDeclaredAnnotations());
    }

    @JRubyMethod(name = "declared_annotations?")
    public RubyBoolean declared_annotations_p() {
        return getRuntime().newBoolean(accessibleObject().getDeclaredAnnotations().length > 0);
    }

    @SuppressWarnings("unchecked")
    @JRubyMethod(name = "annotation_present?")
    public IRubyObject annotation_present_p(final IRubyObject annoClass) {
        if ( ! ( annoClass instanceof JavaClass ) ) {
            throw getRuntime().newTypeError(annoClass, getRuntime().getJavaSupport().getJavaClassClass());
        }
        final Class annotation = ((JavaClass) annoClass).javaClass();
        return getRuntime().newBoolean( accessibleObject().isAnnotationPresent(annotation) );
    }

    // for our purposes, Accessibles are also Members, and vice-versa,
    // so we'll include Member methods here.
    @JRubyMethod
    public IRubyObject declaring_class() {
        Class<?> clazz = ((Member) accessibleObject()).getDeclaringClass();
        if ( clazz != null ) return JavaClass.get(getRuntime(), clazz);
        return getRuntime().getNil();
    }

    @JRubyMethod
    public IRubyObject modifiers() {
        return getRuntime().newFixnum(((Member) accessibleObject()).getModifiers());
    }

    @JRubyMethod
    public IRubyObject name() {
        return getRuntime().newString(((Member) accessibleObject()).getName());
    }

    @JRubyMethod(name = "synthetic?")
    public IRubyObject synthetic_p() {
        return getRuntime().newBoolean(((Member) accessibleObject()).isSynthetic());
    }

    @JRubyMethod(name = {"to_s", "to_string"})
    public RubyString to_string() {
        return getRuntime().newString( toString() );
    }

    @Override
    public String toString() {
        return accessibleObject().toString();
    }

    @Override
    public <T> T toJava(Class<T> target) {
        AccessibleObject accessibleObject = accessibleObject();
        if (target.isAssignableFrom(accessibleObject.getClass())) {
            return target.cast(accessibleObject);
        }
        return super.toJava(target);
    }

}