org.hibernate.type.descriptor.java.ArrayMutabilityPlan Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
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*/
package org.hibernate.type.descriptor.java;
import java.lang.reflect.Array;
/**
* A mutability plan for arrays. Specifically arrays of immutable element type; since the elements themselves
* are immutable, a shallow copy is enough.
*
* @author Steve Ebersole
*/
public class ArrayMutabilityPlan extends MutableMutabilityPlan {
public static final ArrayMutabilityPlan INSTANCE = new ArrayMutabilityPlan();
@SuppressWarnings({ "unchecked", "SuspiciousSystemArraycopy" })
public T deepCopyNotNull(T value) {
if ( ! value.getClass().isArray() ) {
// ugh! cannot find a way to properly define the type signature here to
throw new IllegalArgumentException( "Value was not an array [" + value.getClass().getName() + "]" );
}
final int length = Array.getLength( value );
T copy = (T) Array.newInstance( value.getClass().getComponentType(), length );
System.arraycopy( value, 0, copy, 0, length );
return copy;
}
}