/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* 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.
* !#
*/
package net.ontopia.utils;
/**
* INTERNAL: Utility methods for creating various kinds of useful
* deciders.
* @since 2.0
*/
public class DeciderUtils {
/**
* INTERNAL: Returns a decider which always returns true.
*/
public static <T> DeciderIF<T> getTrueDecider() {
return new StaticDecider<T>(true);
}
/**
* INTERNAL: Returns a decider which always returns false.
*/
public static <T> DeciderIF<T> getFalseDecider() {
return new StaticDecider<T>(false);
}
// --- The actual decider classes
static class StaticDecider<T> implements DeciderIF<T> {
private boolean value;
public StaticDecider(boolean value) {
this.value = value;
}
public boolean ok(T object) {
return value;
}
}
}