vxquery-core/src/main/java/org/apache/vxquery/util/Filter.java

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.vxquery.util;

import org.apache.vxquery.exceptions.SystemException;

public interface Filter<T> {
    public static final Filter<?> TRUE_FILTER = new Filter<Object>() {
        @Override
        public boolean accept(Object value) throws SystemException {
            return true;
        }
    };

    public static final Filter<?> FALSE_FILTER = new Filter<Object>() {
        @Override
        public boolean accept(Object value) throws SystemException {
            return false;
        }
    };

    public boolean accept(T value) throws SystemException;
}