001/*
002  GRANITE DATA SERVICES
003  Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004
005  This file is part of Granite Data Services.
006
007  Granite Data Services is free software; you can redistribute it and/or modify
008  it under the terms of the GNU Library General Public License as published by
009  the Free Software Foundation; either version 2 of the License, or (at your
010  option) any later version.
011
012  Granite Data Services is distributed in the hope that it will be useful, but
013  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015  for more details.
016
017  You should have received a copy of the GNU Library General Public License
018  along with this library; if not, see <http://www.gnu.org/licenses/>.
019*/
020
021package org.granite.util;
022
023import java.lang.reflect.Method;
024
025public class PropertyDescriptor {
026        
027        private String name;
028    private Method getter;
029    private Method setter;
030
031    public PropertyDescriptor(String propertyName, Method getter, Method setter) {
032        this.name = propertyName;
033        setReadMethod(getter);
034        setWriteMethod(setter);
035    }
036    
037    public String getName() {
038        return this.name;
039    }
040
041    public void setWriteMethod(Method setter) {
042        this.setter = setter;
043    }
044
045    public void setReadMethod(Method getter) {
046        this.getter = getter;
047    }
048
049    public Method getWriteMethod() {
050        return setter;
051    }
052
053    public Method getReadMethod() {
054        return getter;
055    }
056
057    @Override
058    public boolean equals(Object object) {
059        if (!(object instanceof PropertyDescriptor))
060                return false;
061
062        PropertyDescriptor pd = (PropertyDescriptor)object;
063        if (!((this.getter == null && pd.getter == null) 
064                        || (this.getter != null && this.getter.equals(pd.getter))))
065                return false;
066        
067        if (!((this.setter == null && pd.setter == null) 
068                        || (this.setter != null && this.setter.equals(pd.setter))))
069                return false;
070        
071        return this.getPropertyType() == pd.getPropertyType();
072    }
073
074    @Override
075    public int hashCode() {
076        int hashCode = getter != null ? getter.hashCode() : 0;
077        if (setter != null)
078                hashCode = hashCode*31 + setter.hashCode();
079        if (getPropertyType() != null)
080                hashCode = hashCode*31 + getPropertyType().hashCode();
081        return hashCode;
082    }
083
084    public Class<?> getPropertyType() {
085        if (getter != null)
086            return getter.getReturnType();
087        if (setter != null) {
088            Class<?>[] parameterTypes = setter.getParameterTypes();
089            return parameterTypes[0];
090        }
091        return null;
092    }
093}