001/*
002 * BridJ - Dynamic and blazing-fast native interop for Java.
003 * http://bridj.googlecode.com/
004 *
005 * Copyright (c) 2010-2013, Olivier Chafik (http://ochafik.com/)
006 * All rights reserved.
007 *
008 * Redistribution and use in source and binary forms, with or without
009 * modification, are permitted provided that the following conditions are met:
010 * 
011 *     * Redistributions of source code must retain the above copyright
012 *       notice, this list of conditions and the following disclaimer.
013 *     * Redistributions in binary form must reproduce the above copyright
014 *       notice, this list of conditions and the following disclaimer in the
015 *       documentation and/or other materials provided with the distribution.
016 *     * Neither the name of Olivier Chafik nor the
017 *       names of its contributors may be used to endorse or promote products
018 *       derived from this software without specific prior written permission.
019 * 
020 * THIS SOFTWARE IS PROVIDED BY OLIVIER CHAFIK AND CONTRIBUTORS ``AS IS'' AND ANY
021 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
022 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
023 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
024 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
025 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
026 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
027 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
028 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
029 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
030 */
031package org.bridj;
032
033import java.lang.reflect.Constructor;
034import java.lang.reflect.Method;
035import java.lang.reflect.Type;
036import org.bridj.cpp.CPPRuntime;
037import org.bridj.util.Utils;
038
039/**
040 * Base class for implementation of runtimes
041 *
042 * @author Olivier
043 */
044public abstract class AbstractBridJRuntime implements BridJRuntime {
045    //@Override
046
047    public void unregister(Type type) {
048        // TODO !!!
049    }
050
051    //@Override
052    public Type getType(NativeObject instance) {
053        if (instance == null) {
054            return null;
055        }
056        return Utils.getClass(instance.getClass());
057    }
058
059    protected java.lang.reflect.Constructor findConstructor(Class<?> type, int constructorId, boolean onlyWithAnnotation) throws SecurityException, NoSuchMethodException {
060        for (java.lang.reflect.Constructor<?> c : type.getDeclaredConstructors()) {
061            org.bridj.ann.Constructor ca = c.getAnnotation(org.bridj.ann.Constructor.class);
062            if (ca == null) {
063                continue;
064            }
065            if (ca.value() == constructorId) {
066                return c;
067            }
068        }
069        if (constructorId < 0)// && args.length == 0)
070        {
071            return type.getConstructor();
072        }
073        Class<?> sup = type.getSuperclass();
074        if (sup != null) {
075            try {
076                java.lang.reflect.Constructor c = findConstructor(sup, constructorId, onlyWithAnnotation);
077                if (onlyWithAnnotation && c != null) {
078                    return c;
079                }
080
081                Type[] params = c.getGenericParameterTypes();
082                Constructor<?>[] ccs = type.getDeclaredConstructors();
083                for (java.lang.reflect.Constructor cc : ccs) {
084                    Type[] ccparams = cc.getGenericParameterTypes();
085                    int overrideOffset = Utils.getEnclosedConstructorParametersOffset(cc);
086                    if (isOverridenSignature(params, ccparams, overrideOffset)) {
087                        return cc;
088                    }
089                }
090            } catch (Throwable th) {
091                th.printStackTrace();
092            }
093        }
094        throw new NoSuchMethodException("Cannot find constructor with index " + constructorId);
095    }
096
097    public static boolean isOverridenSignature(Type[] parentSignature, Type[] overrideSignature, int overrideOffset) {
098        int n = parentSignature.length;
099        if (overrideSignature.length - overrideOffset != n) {
100            return false;
101        }
102        for (int i = 0; i < n; i++) {
103            if (!isOverride(parentSignature[i], overrideSignature[overrideOffset + i])) {
104                return false;
105            }
106        }
107        return true;
108    }
109
110    protected static boolean isOverride(Type parentSignature, Type overrideSignature) {
111        return Utils.getClass(parentSignature).isAssignableFrom(Utils.getClass(overrideSignature));
112    }
113}