001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022
023package org.granite.util;
024
025import java.lang.reflect.Method;
026
027public class PropertyDescriptor {
028        
029        private String name;
030    private Method getter;
031    private Method setter;
032
033    public PropertyDescriptor(String propertyName, Method getter, Method setter) {
034        this.name = propertyName;
035        setReadMethod(getter);
036        setWriteMethod(setter);
037    }
038    
039    public String getName() {
040        return this.name;
041    }
042
043    public void setWriteMethod(Method setter) {
044        this.setter = setter;
045    }
046
047    public void setReadMethod(Method getter) {
048        this.getter = getter;
049    }
050
051    public Method getWriteMethod() {
052        return setter;
053    }
054
055    public Method getReadMethod() {
056        return getter;
057    }
058
059    @Override
060    public boolean equals(Object object) {
061        if (!(object instanceof PropertyDescriptor))
062                return false;
063
064        PropertyDescriptor pd = (PropertyDescriptor)object;
065        if (!((this.getter == null && pd.getter == null) 
066                        || (this.getter != null && this.getter.equals(pd.getter))))
067                return false;
068        
069        if (!((this.setter == null && pd.setter == null) 
070                        || (this.setter != null && this.setter.equals(pd.setter))))
071                return false;
072        
073        return this.getPropertyType() == pd.getPropertyType();
074    }
075
076    @Override
077    public int hashCode() {
078        int hashCode = getter != null ? getter.hashCode() : 0;
079        if (setter != null)
080                hashCode = hashCode*31 + setter.hashCode();
081        if (getPropertyType() != null)
082                hashCode = hashCode*31 + getPropertyType().hashCode();
083        return hashCode;
084    }
085
086    public Class<?> getPropertyType() {
087        if (getter != null)
088            return getter.getReturnType();
089        if (setter != null) {
090            Class<?>[] parameterTypes = setter.getParameterTypes();
091            return parameterTypes[0];
092        }
093        return null;
094    }
095}