/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.metatype.api.types;
import java.util.Collection;
import org.jboss.metatype.api.values.CollectionValue;
/**
* CollectionMetaType.
*
* @author <a href="ales.justin@jboss.com">Ales Justin</a>
* @author <a href="adrian@jboss.com">Adrian Brock</a>
*/
public class CollectionMetaType extends AbstractMetaType
{
/** The serialVersionUID */
private static final long serialVersionUID = -2062790692152055156L;
/** The element type for the array */
private MetaType elementType;
/** Cached hash code */
private transient int cachedHashCode = Integer.MIN_VALUE;
/** Cached string representation */
private transient String cachedToString = null;
public CollectionMetaType(String className, MetaType elementType)
{
super(className);
if (elementType == null)
throw new IllegalArgumentException("Null element type");
this.elementType = elementType;
}
public CollectionMetaType(String className, String description, MetaType elementType)
{
super(className, description);
if (elementType == null)
throw new IllegalArgumentException("Null element type");
this.elementType = elementType;
}
public CollectionMetaType(String className, String typeName, String description, MetaType elementType)
{
super(className, typeName, description);
if (elementType == null)
throw new IllegalArgumentException("Null element type");
this.elementType = elementType;
}
public boolean isCollection()
{
return true;
}
/**
* Get collection meta type.
*
* @param collectionType the element meta type
* @param elementType the element meta type
* @return collection meta type
*/
public static CollectionMetaType getCollectionType(String collectionType, MetaType elementType)
{
return new CollectionMetaType(collectionType, elementType);
}
/**
* Get the meta type of the array elements
*
* @return the element type
*/
public MetaType getElementType()
{
return elementType;
}
@Override
@SuppressWarnings("unchecked")
public boolean isValue(Object obj)
{
if (obj == null)
return false;
if (obj instanceof Collection == false && (obj instanceof CollectionValue) == false)
return false;
if (obj instanceof CollectionValue)
{
CollectionValue cv = (CollectionValue)obj;
return equals(cv.getMetaType());
}
Collection collection = (Collection)obj;
for(Object element : collection)
{
if (elementType.isValue(element) == false)
return false;
}
return true;
}
@Override
public boolean equals(Object obj)
{
if (this == obj)
return true;
if (obj == null || obj instanceof CollectionMetaType == false)
return false;
CollectionMetaType other = (CollectionMetaType) obj;
return getTypeName().equals(other.getTypeName()) && getElementType().equals(other.getElementType());
}
@Override
public int hashCode()
{
if (cachedHashCode != Integer.MIN_VALUE)
return cachedHashCode;
cachedHashCode = getTypeName().hashCode() + getElementType().hashCode();
return cachedHashCode;
}
@Override
public String toString()
{
if (cachedToString != null)
return cachedToString;
StringBuilder buffer = new StringBuilder(CollectionMetaType.class.getSimpleName());
buffer.append("{type=");
buffer.append(getTypeName());
buffer.append(" elementType=");
buffer.append(elementType);
cachedToString = buffer.toString();
return cachedToString;
}
}