/*
* #%L
* Nazgul Project: nazgul-core-clustering-api
* %%
* Copyright (C) 2010 - 2017 jGuru Europe AB
* %%
* Licensed under the jGuru Europe AB license (the "License"), based
* on Apache License, Version 2.0; you may not use this file except
* in compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.jguru.se/licenses/jguruCorporateSourceLicense-2.0.txt
*
* 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.
* #L%
*
*/
package se.jguru.nazgul.core.clustering.api;
import se.jguru.nazgul.core.algorithms.api.Validate;
import javax.validation.constraints.NotNull;
import javax.xml.bind.annotation.XmlTransient;
/**
* Trivial IdGenerator which always returns a constant string.
*
* @author <a href="mailto:lj@jguru.se">Lennart Jörelid</a>, jGuru Europe AB
*/
@XmlTransient
public final class ConstantIdGenerator implements IdGenerator {
// Internal state
private String id;
/**
* Compound constructor creating a ConstantIdGenerator which always returns the provided id String.
*
* @param id The constant id.
*/
public ConstantIdGenerator(@NotNull final String id) {
// Check sanity
Validate.notEmpty(id, "id");
// Assign internal state
this.id = id;
}
/**
* {@inheritDoc}
*/
@Override
public final String getIdentifier() {
return id;
}
/**
* {@inheritDoc}
*/
@Override
public final boolean isIdentifierAvailable() {
return true;
}
}