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/*
* Copyright 2006-2007 the original author or authors.
*
* Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sf.ezmorph.object;
import java.util.Calendar;
import java.util.Date;
import java.util.Map;
import net.sf.ezmorph.MorphException;
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
/**
* Morphs a Map into a Date.<br>
* The Map should have at least one of the following keys
* [yer,month,day,hour,minutes,seconds,milliseconds] and the values should be
* instances of Number. Any key that is not defined will have zero (0) assigned
* as its value.
*
* @author Andres Almiray <aalmiray@users.sourceforge.net>
*/
public class MapToDateMorpher extends AbstractObjectMorpher
{
private Date defaultValue;
public MapToDateMorpher()
{
super();
}
public MapToDateMorpher( Date defaultValue )
{
super( true );
this.defaultValue = defaultValue;
}
public boolean equals( Object obj )
{
if( this == obj ){
return true;
}
if( obj == null ){
return false;
}
if( !(obj instanceof MapToDateMorpher) ){
return false;
}
MapToDateMorpher other = (MapToDateMorpher) obj;
EqualsBuilder builder = new EqualsBuilder();
if( isUseDefault() && other.isUseDefault() ){
builder.append( getDefaultValue(), other.getDefaultValue() );
return builder.isEquals();
}else if( !isUseDefault() && !other.isUseDefault() ){
return builder.isEquals();
}else{
return false;
}
}
/**
* Returns the default value for this Morpher.
*/
public Date getDefaultValue()
{
return (Date) defaultValue.clone();
}
public int hashCode()
{
HashCodeBuilder builder = new HashCodeBuilder();
if( isUseDefault() ){
builder.append( getDefaultValue() );
}
return builder.toHashCode();
}
public Object morph( Object value )
{
if( value == null ){
return null;
}
if( Date.class.isAssignableFrom( value.getClass() ) ){
return (Date) value;
}
if( !supports( value.getClass() ) ){
throw new MorphException( value.getClass() + " is not supported" );
}
Map map = (Map) value;
if( map.isEmpty() ){
if( isUseDefault() ){
return defaultValue;
}else{
throw new MorphException( "Unable to parse the date " + value );
}
}
Calendar c = Calendar.getInstance();
c.set( Calendar.YEAR, getValue( map, "year" ) );
c.set( Calendar.MONTH, getValue( map, "month" ) );
c.set( Calendar.DATE, getValue( map, "day" ) );
c.set( Calendar.HOUR_OF_DAY, getValue( map, "hour" ) );
c.set( Calendar.MINUTE, getValue( map, "minutes" ) );
c.set( Calendar.SECOND, getValue( map, "seconds" ) );
c.set( Calendar.MILLISECOND, getValue( map, "milliseconds" ) );
return c.getTime();
}
public Class morphsTo()
{
return Date.class;
}
/**
* Sets the defaultValue to use if the value to be morphed is null.
*
* @param defaultValue return value if the value to be morphed is null
*/
public void setDefaultValue( Date defaultValue )
{
this.defaultValue = (Date) defaultValue.clone();
}
public boolean supports( Class clazz )
{
return clazz != null && Map.class.isAssignableFrom( clazz );
}
private int getValue( Map map, String key )
{
Object value = map.get( key );
if( value == null || !(value instanceof Number) ){
return 0;
}
Number n = (Number) value;
return n.intValue();
}
}
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