Mega Code Archive
Resize a Java array
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//package ca.chaves.familyBrowser.helpers;
import java.lang.reflect.Array;
/**
* This class is our utility belt. It contains all static functions which do not
* fit anywhere else.
*
* @author "David Chaves <david@chaves.ca>"
*/
class Utils {
/**
* Resize a Java array
*
* @param oldArray
* @param minimumSize
* @return the new Java array
*/
public static Object resizeArray(final Object oldArray, final int minimumSize) {
final Class<?> cls = oldArray.getClass();
if (!cls.isArray()) {
return null;
}
final int oldLength = Array.getLength(oldArray);
int newLength = oldLength + (oldLength / 2); // 50% more
if (newLength < minimumSize) {
newLength = minimumSize;
}
final Class<?> componentType = oldArray.getClass().getComponentType();
final Object newArray = Array.newInstance(componentType, newLength);
System.arraycopy(oldArray, 0, newArray, 0, oldLength);
return newArray;
}
}
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