/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library 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.
*/
package com.liferay.dynamic.data.mapping.form.evaluator.internal.functions;
import com.liferay.dynamic.data.mapping.expression.DDMExpressionFunction;
import com.liferay.portal.kernel.util.Validator;
import java.util.stream.Stream;
import org.osgi.service.component.annotations.Component;
/**
* @author Leonardo Barros
*/
@Component(
immediate = true, property = "ddm.form.evaluator.function.name=isEmpty",
service = DDMExpressionFunction.class
)
public class IsEmptyFunction implements DDMExpressionFunction {
@Override
public Object evaluate(Object... parameters) {
if (parameters == null) {
return true;
}
if ((parameters.length == 1) && isArray(parameters[0])) {
Object[] values = (Object[])parameters[0];
if (values.length == 0) {
return true;
}
Stream<Object> stream = Stream.of(values);
return !stream.anyMatch(Validator::isNotNull);
}
return Validator.isNull(parameters[0]);
}
protected boolean isArray(Object parameter) {
Class<?> clazz = parameter.getClass();
return clazz.isArray();
}
}