/**
* 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.ga.watchmaker.cd;
import com.google.common.base.Preconditions;
class NominalAttr implements Attribute {
private final String[] values;
NominalAttr(String[] values) {
Preconditions.checkArgument(values.length > 0, "values is empty");
this.values = values;
}
public int getNbvalues() {
return values.length;
}
@Override
public boolean isNumerical() {
return false;
}
/**
* Converts a string value of a nominal attribute to an {@code int}.
*
* @param value
* @return an {@code int} representing the value
* @throws IllegalArgumentException if the value is not found.
*/
public int valueIndex(String value) {
for (int index = 0; index < values.length; index++) {
if (values[index].equals(value)) {
return index;
}
}
throw new IllegalArgumentException("Value (" + value + ") not found");
}
}