| /* |
| * Copyright 2000-2014 Vaadin Ltd. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| * |
| * Contributor: |
| * Florian Pirchner - Copied filter and fixed them for osbp usecase. |
| */ |
| package org.eclipse.osbp.dsl.dto.lib.services.filters; |
| |
| |
| public class LIsNull implements ILFilter { |
| |
| private final Object propertyId; |
| |
| /** |
| * Constructor for a filter that compares the value of an item property with |
| * null. |
| * |
| * For in-memory filtering, a simple == check is performed. For other |
| * containers, the comparison implementation is container dependent but |
| * should correspond to the in-memory null check. |
| * |
| * @param propertyId |
| * the identifier (not null) of the property whose value to check |
| */ |
| public LIsNull(Object propertyId) { |
| this.propertyId = propertyId; |
| } |
| |
| @Override |
| public boolean appliesToProperty(Object propertyId) { |
| return getPropertyId().equals(propertyId); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == null) { |
| return false; |
| } |
| |
| // Only objects of the same class can be equal |
| if (!getClass().equals(obj.getClass())) { |
| return false; |
| } |
| final LIsNull o = (LIsNull) obj; |
| |
| // Checks the properties one by one |
| return (null != getPropertyId()) ? getPropertyId().equals( |
| o.getPropertyId()) : null == o.getPropertyId(); |
| } |
| |
| @Override |
| public int hashCode() { |
| return (null != getPropertyId() ? getPropertyId().hashCode() : 0); |
| } |
| |
| /** |
| * Returns the property id of the property tested by the filter, not null |
| * for valid filters. |
| * |
| * @return property id (not null) |
| */ |
| public Object getPropertyId() { |
| return propertyId; |
| } |
| |
| } |