org.hibernate.envers.internal.tools.ArraysTools Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2013, 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
* Boston, MA 02110-1301 USA
*/
package org.hibernate.envers.internal.tools;
import java.util.Map;
/**
* @author Adam Warski (adam at warski dot org)
*/
public abstract class ArraysTools {
public static boolean arrayIncludesInstanceOf(T[] array, Class cls) {
for ( T obj : array ) {
if ( cls.isAssignableFrom( obj.getClass() ) ) {
return true;
}
}
return false;
}
public static boolean arraysEqual(Object[] array1, Object[] array2) {
if ( array1 == null ) {
return array2 == null;
}
if ( array2 == null || array1.length != array2.length ) {
return false;
}
for ( int i = 0; i < array1.length; ++i ) {
if ( array1[i] != null ? !array1[i].equals( array2[i] ) : array2[i] != null ) {
return false;
}
}
return true;
}
/**
* Converts map's value set to an array. {@code keys} parameter specifies requested elements and their order.
*
* @param data Source map.
* @param keys Array of keys that represent requested map values.
*
* @return Array of values stored in the map under specified keys. If map does not contain requested key,
* {@code null} is inserted.
*/
public static Object[] mapToArray(Map data, String[] keys) {
final Object[] ret = new Object[keys.length];
for ( int i = 0; i < keys.length; ++i ) {
ret[i] = data.get( keys[i] );
}
return ret;
}
}