Java tutorial
//package com.java2s; /** * 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. */ import java.io.ByteArrayInputStream; import java.io.InputStream; import java.io.SequenceInputStream; import java.util.zip.DataFormatException; import java.util.zip.Inflater; public class Main { public static InputStream inflate(byte[] deflatedToken) throws DataFormatException { return inflate(deflatedToken, true); } public static InputStream inflate(byte[] deflatedToken, boolean nowrap) throws DataFormatException { Inflater inflater = new Inflater(nowrap); inflater.setInput(deflatedToken); byte[] input = new byte[deflatedToken.length * 2]; int inflatedLen = 0; int inputLen = 0; byte[] inflatedToken = input; while (!inflater.finished()) { inputLen = inflater.inflate(input); if (!inflater.finished()) { if (inputLen == 0) { if (inflater.needsInput()) { throw new DataFormatException("Inflater can not inflate all the token bytes"); } else { break; } } inflatedToken = new byte[input.length + inflatedLen]; System.arraycopy(input, 0, inflatedToken, inflatedLen, inputLen); inflatedLen += inputLen; } } InputStream is = new ByteArrayInputStream(input, 0, inputLen); if (inflatedToken != input) { is = new SequenceInputStream(new ByteArrayInputStream(inflatedToken, 0, inflatedLen), is); } return is; } }