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Hibernate's entity version (audit/history) support
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
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;
}
}