org.apache.lucene.store.jdbc.handler.NoOpFileEntryHandler Maven / Gradle / Ivy
/*
* Copyright 2004-2009 the original author or authors.
*
* 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 org.apache.lucene.store.jdbc.handler;
import java.io.IOException;
import java.util.List;
import org.apache.lucene.store.IndexInput;
import org.apache.lucene.store.IndexOutput;
import org.apache.lucene.store.jdbc.JdbcDirectory;
/**
* A No Operation file entry handler. Performs no actual dirty operations,
* and returns empty data for read operations.
*
* @author kimchy
*/
public class NoOpFileEntryHandler implements FileEntryHandler {
private static class NoOpIndexInput extends IndexInput {
public byte readByte() throws IOException {
return 0;
}
public void readBytes(byte[] b, int offset, int len) throws IOException {
}
public void close() throws IOException {
}
public long getFilePointer() {
return 0;
}
public void seek(long pos) throws IOException {
}
public long length() {
return 0;
}
}
private static class NoOpIndexOutput extends IndexOutput {
public void writeByte(byte b) throws IOException {
}
public void writeBytes(byte[] b, int offset, int length) throws IOException {
}
public void flush() throws IOException {
}
public void close() throws IOException {
}
public long getFilePointer() {
return 0;
}
public void seek(long pos) throws IOException {
}
public long length() throws IOException {
return 0;
}
}
private static IndexInput indexInput = new NoOpIndexInput();
private static IndexOutput indexOutput = new NoOpIndexOutput();
public void configure(JdbcDirectory jdbcDirectory) {
}
public boolean fileExists(final String name) throws IOException {
return false;
}
public long fileModified(final String name) throws IOException {
return 0;
}
public void touchFile(final String name) throws IOException {
}
public void deleteFile(final String name) throws IOException {
}
public List deleteFiles(List names) throws IOException {
return null;
}
public void renameFile(final String from, final String to) throws IOException {
}
public long fileLength(final String name) throws IOException {
return 0;
}
public IndexInput openInput(String name) throws IOException {
return indexInput;
}
public IndexOutput createOutput(String name) throws IOException {
return indexOutput;
}
public void close() throws IOException {
// do notihng
}
}