/* * 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.util.fst; /** Reads in reverse from a single byte[]. */ final class ReverseBytesReader extends FST.BytesReader { private final byte[] bytes; private int pos; public ReverseBytesReader(byte[] bytes) { this.bytes = bytes; } @Override public byte readByte() { return bytes[pos--]; } @Override public void readBytes(byte[] b, int offset, int len) { for(int i=0;i<len;i++) { b[offset+i] = bytes[pos--]; } } @Override public void skipBytes(long count) { pos -= count; } @Override public long getPosition() { return pos; } @Override public void setPosition(long pos) { this.pos = (int) pos; } @Override public boolean reversed() { return true; } }