| /* ==================================================================== |
| 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.poi.poifs.storage; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.zip.GZIPInputStream; |
| |
| import javax.xml.bind.DatatypeConverter; |
| |
| import org.apache.poi.util.HexDump; |
| import org.apache.poi.util.HexRead; |
| import org.apache.poi.util.IOUtils; |
| |
| /** |
| * Test utility class.<br/> |
| * |
| * Creates raw <code>byte[]</code> data from hex-dump String arrays. |
| * |
| * @author Josh Micich |
| */ |
| public final class RawDataUtil { |
| |
| public static byte[] decode(String[] hexDataLines) { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(hexDataLines.length * 32 + 32); |
| |
| for (String hexDataLine : hexDataLines) { |
| byte[] lineData = HexRead.readFromString(hexDataLine); |
| baos.write(lineData, 0, lineData.length); |
| } |
| return baos.toByteArray(); |
| } |
| |
| /** |
| * Development time utility method.<br/> |
| * Transforms a byte array into hex-dump String lines in java source code format. |
| */ |
| public static void dumpData(byte[] data) { |
| int i=0; |
| System.out.println("String[] hexDataLines = {"); |
| System.out.print("\t\""); |
| while(true) { |
| System.out.print(HexDump.byteToHex(data[i]).substring(2)); |
| i++; |
| if (i>=data.length) { |
| break; |
| } |
| if (i % 32 == 0) { |
| System.out.println("\","); |
| System.out.print("\t\""); |
| } else { |
| System.out.print(" "); |
| } |
| } |
| System.out.println("\","); |
| System.out.println("};"); |
| } |
| |
| /** |
| * Development time utility method.<br/> |
| * Confirms that the specified byte array is equivalent to the hex-dump String lines. |
| */ |
| public static void confirmEqual(byte[] expected, String[] hexDataLines) { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(hexDataLines.length * 32 + 32); |
| |
| for (String hexDataLine : hexDataLines) { |
| byte[] lineData = HexRead.readFromString(hexDataLine); |
| baos.write(lineData, 0, lineData.length); |
| } |
| if (!Arrays.equals(expected, baos.toByteArray())) { |
| throw new RuntimeException("different"); |
| } |
| } |
| |
| /** |
| * Decompress previously gziped/base64ed data |
| * |
| * @param data the gziped/base64ed data |
| * @return the raw bytes |
| * @throws IOException if you copy and pasted the data wrong |
| */ |
| public static byte[] decompress(String data) throws IOException { |
| byte[] base64Bytes = DatatypeConverter.parseBase64Binary(data); |
| return IOUtils.toByteArray(new GZIPInputStream(new ByteArrayInputStream(base64Bytes))); |
| } |
| |
| /** |
| * Compress raw data for test runs - usually called while debugging :) |
| * |
| * @param data the raw data |
| * @return the gziped/base64ed data as String |
| * @throws IOException usually not ... |
| */ |
| public static String compress(byte[] data) throws IOException { |
| java.io.ByteArrayOutputStream bos = new java.io.ByteArrayOutputStream(); |
| java.util.zip.GZIPOutputStream gz = new java.util.zip.GZIPOutputStream(bos); |
| gz.write(data); |
| gz.finish(); |
| return DatatypeConverter.printBase64Binary(bos.toByteArray()); |
| } |
| } |