[14982] | 1 | /*
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| 2 | * Copyright 2001-2004 The Apache Software Foundation
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | *
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| 16 | */
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| 17 |
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| 18 | package org.apache.tools.ant.taskdefs;
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| 19 |
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| 20 |
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| 21 | import java.io.File;
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| 22 | import java.io.FileInputStream;
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| 23 | import java.io.IOException;
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| 24 | import java.io.InputStream;
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| 25 | import java.io.OutputStream;
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| 26 | import org.apache.tools.ant.BuildException;
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| 27 | import org.apache.tools.ant.Task;
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| 28 |
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| 29 | /**
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| 30 | * Abstract Base class for pack tasks.
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| 31 | *
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| 32 | *
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| 33 | * @since Ant 1.5
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| 34 | */
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| 35 |
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| 36 | public abstract class Pack extends Task {
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| 37 |
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| 38 | protected File zipFile;
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| 39 | protected File source;
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| 40 |
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| 41 | /**
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| 42 | * the required destination file.
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| 43 | * @param zipFile
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| 44 | */
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| 45 | public void setZipfile(File zipFile) {
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| 46 | this.zipFile = zipFile;
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| 47 | }
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| 48 |
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| 49 | /**
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| 50 | * the required destination file.
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| 51 | * @param zipFile
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| 52 | */
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| 53 | public void setDestfile(File zipFile) {
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| 54 | setZipfile(zipFile);
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| 55 | }
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| 56 |
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| 57 | /**
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| 58 | * the file to compress; required.
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| 59 | * @param src
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| 60 | */
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| 61 | public void setSrc(File src) {
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| 62 | source = src;
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| 63 | }
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| 64 |
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| 65 |
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| 66 | /**
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| 67 | * validation routine
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| 68 | * @throws BuildException if anything is invalid
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| 69 | */
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| 70 | private void validate() throws BuildException {
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| 71 | if (zipFile == null) {
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| 72 | throw new BuildException("zipfile attribute is required", getLocation());
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| 73 | }
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| 74 |
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| 75 | if (zipFile.isDirectory()) {
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| 76 | throw new BuildException("zipfile attribute must not "
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| 77 | + "represent a directory!", getLocation());
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| 78 | }
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| 79 |
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| 80 | if (source == null) {
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| 81 | throw new BuildException("src attribute is required", getLocation());
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| 82 | }
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| 83 |
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| 84 | if (source.isDirectory()) {
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| 85 | throw new BuildException("Src attribute must not "
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| 86 | + "represent a directory!", getLocation());
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| 87 | }
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| 88 | }
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| 89 |
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| 90 | /**
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| 91 | * validate, then hand off to the subclass
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| 92 | * @throws BuildException
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| 93 | */
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| 94 | public void execute() throws BuildException {
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| 95 | validate();
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| 96 |
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| 97 | if (!source.exists()) {
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| 98 | log("Nothing to do: " + source.getAbsolutePath()
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| 99 | + " doesn't exist.");
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| 100 | } else if (zipFile.lastModified() < source.lastModified()) {
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| 101 | log("Building: " + zipFile.getAbsolutePath());
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| 102 | pack();
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| 103 | } else {
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| 104 | log("Nothing to do: " + zipFile.getAbsolutePath()
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| 105 | + " is up to date.");
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| 106 | }
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| 107 | }
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| 108 |
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| 109 | /**
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| 110 | * zip a stream to an output stream
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| 111 | * @param in
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| 112 | * @param zOut
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| 113 | * @throws IOException
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| 114 | */
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| 115 | private void zipFile(InputStream in, OutputStream zOut)
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| 116 | throws IOException {
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| 117 | byte[] buffer = new byte[8 * 1024];
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| 118 | int count = 0;
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| 119 | do {
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| 120 | zOut.write(buffer, 0, count);
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| 121 | count = in.read(buffer, 0, buffer.length);
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| 122 | } while (count != -1);
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| 123 | }
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| 124 |
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| 125 | /**
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| 126 | * zip a file to an output stream
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| 127 | * @param file
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| 128 | * @param zOut
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| 129 | * @throws IOException
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| 130 | */
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| 131 | protected void zipFile(File file, OutputStream zOut)
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| 132 | throws IOException {
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| 133 | FileInputStream fIn = new FileInputStream(file);
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| 134 | try {
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| 135 | zipFile(fIn, zOut);
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| 136 | } finally {
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| 137 | fIn.close();
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| 138 | }
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| 139 | }
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| 140 |
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| 141 | /**
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| 142 | * subclasses must implement this method to do their compression
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| 143 | */
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| 144 | protected abstract void pack();
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| 145 | }
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