// Copyright (c) 2013-2014, Webit Team. All Rights Reserved.
package webit.script.lang.method;
import java.lang.reflect.Array;
import webit.script.Context;
import webit.script.exceptions.ScriptRuntimeException;
import webit.script.lang.MethodDeclare;
import webit.script.util.StringUtil;
/**
*
* @author Zqq
*/
public class NativeNewArrayDeclare implements MethodDeclare {
private final Class componentType;
public NativeNewArrayDeclare(Class componentType) {
this.componentType = componentType;
}
public Object invoke(final Context context, final Object[] args) {
final int len;
if (args != null && args.length > 0) {
Object lenObject;
if ((lenObject = args[0]) instanceof Number) {
if ((len = ((Number) lenObject).intValue()) < 0) {
throw new ScriptRuntimeException(StringUtil.concat("must given a nonnegative number as array's length: ", len));
}
} else {
throw new ScriptRuntimeException(StringUtil.concatObjectClass("must given a number as array's length, but get a: ", lenObject));
}
} else {
len = 0;
}
return Array.newInstance(componentType, len);
}
}