org.eclipse.osbp.jpa.services/src/org/eclipse/osbp/jpa/services/filters/LOr.java

/*
 * 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.jpa.services.filters;

import org.eclipse.osbp.runtime.common.filter.ILFilter;

public class LOr extends LAbstractJunctionFilter {

    /**
     * 
     * @param filters
     *            filters of which the Or filter will be composed
     */
    public LOr(ILFilter... filters) {
        super(filters);
    }

    /**
     * Returns true if a change in the named property may affect the filtering
     * result. If some of the sub-filters are not in-memory filters, true is
     * returned.
     * 
     * By default, all sub-filters are iterated to check if any of them applies.
     * If there are no sub-filters, true is returned as an empty Or rejects all
     * items.
     */
    @Override
    public boolean appliesToProperty(Object propertyId) {
        if (getFilters().isEmpty()) {
            // empty Or filters out everything
            return true;
        } else {
            return super.appliesToProperty(propertyId);
        }
    }

}