| /* |
| * 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.lucene.replicator; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.lucene.store.IndexInput; |
| |
| /** |
| * An {@link InputStream} which wraps an {@link IndexInput}. |
| * |
| * @lucene.experimental |
| */ |
| public final class IndexInputInputStream extends InputStream { |
| |
| private final IndexInput in; |
| |
| private long remaining; |
| |
| public IndexInputInputStream(IndexInput in) { |
| this.in = in; |
| remaining = in.length(); |
| } |
| |
| @Override |
| public int read() throws IOException { |
| if (remaining == 0) { |
| return -1; |
| } else { |
| --remaining; |
| return in.readByte(); |
| } |
| } |
| |
| @Override |
| public int available() throws IOException { |
| return (int) in.length(); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| in.close(); |
| } |
| |
| @Override |
| public int read(byte[] b) throws IOException { |
| return read(b, 0, b.length); |
| } |
| |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| if (remaining == 0) { |
| return -1; |
| } |
| if (remaining < len) { |
| len = (int) remaining; |
| } |
| in.readBytes(b, off, len); |
| remaining -= len; |
| return len; |
| } |
| |
| @Override |
| public long skip(long n) throws IOException { |
| if (remaining == 0) { |
| return -1; |
| } |
| if (remaining < n) { |
| n = remaining; |
| } |
| in.seek(in.getFilePointer() + n); |
| remaining -= n; |
| return n; |
| } |
| |
| } |