X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.4.0/lucene/contrib/facet/src/java/org/apache/lucene/util/UnsafeByteArrayInputStream.java?ds=inline diff --git a/lucene-java-3.4.0/lucene/contrib/facet/src/java/org/apache/lucene/util/UnsafeByteArrayInputStream.java b/lucene-java-3.4.0/lucene/contrib/facet/src/java/org/apache/lucene/util/UnsafeByteArrayInputStream.java deleted file mode 100644 index 1642b62..0000000 --- a/lucene-java-3.4.0/lucene/contrib/facet/src/java/org/apache/lucene/util/UnsafeByteArrayInputStream.java +++ /dev/null @@ -1,147 +0,0 @@ -package org.apache.lucene.util; - -import java.io.ByteArrayInputStream; -import java.io.IOException; -import java.io.InputStream; - -/** - * 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. - */ - -/** - * This class, much like {@link ByteArrayInputStream} uses a given buffer as a - * source of an InputStream. Unlike ByteArrayInputStream, this class does not - * "waste" memory by creating a local copy of the given buffer, but rather uses - * the given buffer as is. Hence the name Unsafe. While using this class one - * should remember that the byte[] buffer memory is shared and might be changed - * from outside. - * - * For reuse-ability, a call for {@link #reInit(byte[])} can be called, and - * initialize the stream with a new buffer. - * - * @lucene.experimental - */ -public class UnsafeByteArrayInputStream extends InputStream { - - private byte[] buffer; - private int markIndex; - private int upperLimit; - private int index; - - /** - * Creates a new instance by not using any byte[] up front. If you use this - * constructor, you MUST call either of the {@link #reInit(byte[]) reInit} - * methods before you consume any byte from this instance.
- * This constructor is for convenience purposes only, so that if one does not - * have the byte[] at the moment of creation, one is not forced to pass a - * new byte[0] or something. Obviously in that case, one will - * call either {@link #reInit(byte[]) reInit} methods before using the class. - */ - public UnsafeByteArrayInputStream() { - markIndex = upperLimit = index = 0; - } - - /** - * Creates an UnsafeByteArrayInputStream which uses a given byte array as - * the source of the stream. Default range is [0 , buffer.length) - * - * @param buffer - * byte array used as the source of this stream - */ - public UnsafeByteArrayInputStream(byte[] buffer) { - reInit(buffer, 0, buffer.length); - } - - /** - * Creates an UnsafeByteArrayInputStream which uses a given byte array as - * the source of the stream, at the specific range: [startPos, endPos) - * - * @param buffer - * byte array used as the source of this stream - * @param startPos - * first index (inclusive) to the data lying in the given buffer - * @param endPos - * an index (exclusive) where the data ends. data @ - * buffer[endPos] will never be read - */ - public UnsafeByteArrayInputStream(byte[] buffer, int startPos, int endPos) { - reInit(buffer, startPos, endPos); - } - - @Override - public void mark(int readlimit) { - markIndex = index; - } - - @Override - public boolean markSupported() { - return true; - } - - /** - * Initialize the stream with a given buffer, using the default limits of - * [0, buffer.length) - * - * @param buffer - * byte array used as the source of this stream - */ - public void reInit(byte[] buffer) { - reInit(buffer, 0, buffer.length); - } - - /** - * Initialize the stream with a given byte array as the source of the - * stream, at the specific range: [startPos, endPos) - * - * @param buffer - * byte array used as the source of this stream - * @param startPos - * first index (inclusive) to the data lying in the given buffer - * @param endPos - * an index (exclusive) where the data ends. data @ - * buffer[endPos] will never be read - */ - public void reInit(byte[] buffer, int startPos, int endPos) { - this.buffer = buffer; - markIndex = startPos; - upperLimit = endPos; - index = markIndex; - } - - @Override - public int available() throws IOException { - return upperLimit - index; - } - - /** - * Read a byte. Data returned as an integer [0,255] If end of stream - * reached, returns -1 - */ - @Override - public int read() throws IOException { - return index < upperLimit ? buffer[index++] & 0xff : -1; - } - - /** - * Resets the stream back to its original state. Basically - moving the - * index back to start position. - */ - @Override - public void reset() throws IOException { - index = markIndex; - } - -}