/*
* 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.exoplatform.services.jcr.impl.core.query.lucene;
import java.io.IOException;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.TermDocs;
import org.apache.lucene.index.TermEnum;
/**
* Implements a TermDocs with a single document.
*/
class SingleTermDocs implements TermDocs {
/**
* Single document number;
*/
private final int doc;
/**
* Flag to return the document number once.
*/
private boolean next = true;
/**
* Creates a <code>SingleTermDocs</code> that returns <code>doc</code> as
* its single document.
*
* @param doc the document number.
*/
SingleTermDocs(int doc) {
this.doc = doc;
}
/**
* @throws UnsupportedOperationException always
*/
public void seek(Term term) {
throw new UnsupportedOperationException();
}
/**
* @throws UnsupportedOperationException always
*/
public void seek(TermEnum termEnum) {
throw new UnsupportedOperationException();
}
/**
* {@inheritDoc}
*/
public int doc() {
return doc;
}
/**
* {@inheritDoc}
*/
public int freq() {
return 1;
}
/**
* {@inheritDoc}
*/
public boolean next() throws IOException {
boolean hasNext = next;
next = false;
return hasNext;
}
/**
* {@inheritDoc}
*/
public int read(int[] docs, int[] freqs) throws IOException {
if (next && docs.length > 0) {
docs[0] = doc;
freqs[0] = 1;
next = false;
return 1;
}
return 0;
}
/**
* {@inheritDoc}
*/
public boolean skipTo(int target) throws IOException {
return false;
}
/**
* {@inheritDoc}
*/
public void close() throws IOException {
}
}