/**
* 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.mahout.classifier.df.data.conditions;
import org.apache.mahout.classifier.df.data.Instance;
/**
* Condition on Instance
*/
public abstract class Condition {
/**
* Returns true is the checked instance matches the condition
*
* @param instance
* checked instance
* @return true is the checked instance matches the condition
*/
public abstract boolean isTrueFor(Instance instance);
/**
* Condition that checks if the given attribute has a value "equal" to the given value
*/
public static Condition equals(int attr, double value) {
return new Equals(attr, value);
}
/**
* Condition that checks if the given attribute has a value "lesser" than the given value
*/
public static Condition lesser(int attr, double value) {
return new Lesser(attr, value);
}
/**
* Condition that checks if the given attribute has a value "greater or equal" than the given value
*/
public static Condition greaterOrEquals(int attr, double value) {
return new GreaterOrEquals(attr, value);
}
}