137 lines
5.3 KiB
Java
137 lines
5.3 KiB
Java
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/*
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* Janino - An embedded Java[TM] compiler
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*
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* Copyright (c) 2001-2010, Arno Unkrig
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
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* following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
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* following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.codehaus.janino.util.resource;
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import java.io.File;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Iterator;
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import java.util.List;
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import java.util.zip.ZipFile;
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import org.codehaus.janino.util.iterator.TransformingIterator;
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/**
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* A {@link org.codehaus.janino.util.resource.ResourceFinder} that finds its resources along a "path"
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* consisting of JAR file names, ZIP file names, and directory names.
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* @see org.codehaus.janino.util.resource.ZipFileResourceFinder
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* @see org.codehaus.janino.util.resource.DirectoryResourceFinder
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*/
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@SuppressWarnings({ "rawtypes", "unchecked" }) public
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class PathResourceFinder extends LazyMultiResourceFinder {
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/** @param entries The entries of the "path" */
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public
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PathResourceFinder(final File[] entries) {
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super(PathResourceFinder.createIterator(Arrays.asList(entries).iterator()));
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}
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/** @param entries The entries of the "path" (type must be {@link File}) */
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public
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PathResourceFinder(Iterator<ResourceFinder> entries) { super(entries); }
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/** @param path A java-like path, i.e. a "path separator"-separated list of entries. */
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public
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PathResourceFinder(String path) { this(PathResourceFinder.parsePath(path)); }
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private static Iterator<ResourceFinder>
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createIterator(final Iterator<File> entries) {
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return new TransformingIterator/*<File, ResourceFinder>*/(entries) {
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@Override protected Object transform(Object o) { return PathResourceFinder.createResourceFinder((File) o); }
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};
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}
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/**
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* Break a given string up by the system-dependent path-separator character (on UNIX systems,
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* this character is ':'; on Microsoft Windows systems it is ';'). Empty components are
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* ignored.
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* <p>
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* UNIX Examples:
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* <dl>
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* <dt>A:B:C <dd>A, B, C
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* <dt>::B: <dd>B
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* <dt>:A <dd>A
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* <dt>(Empty string) <dd>(Zero components)
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* </dl>
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*
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* @see File#pathSeparatorChar
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*/
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public static File[]
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parsePath(String s) {
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int from = 0;
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List<File> l = new ArrayList();
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for (;;) {
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int to = s.indexOf(File.pathSeparatorChar, from);
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if (to == -1) {
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if (from != s.length()) l.add(new File(s.substring(from)));
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break;
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}
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if (to != from) l.add(new File(s.substring(from, to)));
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from = to + 1;
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}
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return (File[]) l.toArray(new File[l.size()]);
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}
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/**
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* A factory method that creates a Java classpath-style ResourceFinder as
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* follows:
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* <table>
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* <tr><th><code>entry</code></th><th>Returned {@link ResourceFinder}</th></tr>
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* <tr><td>"*.jar" file</td><td>{@link ZipFileResourceFinder}</td></tr>
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* <tr><td>"*.zip" file</td><td>{@link ZipFileResourceFinder}</td></tr>
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* <tr><td>directory</td><td>{@link DirectoryResourceFinder}</td></tr>
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* <tr><td>any other</td><td>A {@link ResourceFinder} that never finds a resource</td></tr>
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* </table>
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* @return a valid {@link ResourceFinder}
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*/
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private static ResourceFinder
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createResourceFinder(final File entry) {
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// ZIP file or JAR file.
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if (
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(entry.getName().endsWith(".jar") || entry.getName().endsWith(".zip"))
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&& entry.isFile()
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) {
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try {
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return new ZipFileResourceFinder(new ZipFile(entry));
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} catch (IOException e) {
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return ResourceFinder.EMPTY_RESOURCE_FINDER;
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}
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}
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// Directory.
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if (entry.isDirectory()) {
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return new DirectoryResourceFinder(entry);
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}
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// Invalid entry.
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return ResourceFinder.EMPTY_RESOURCE_FINDER;
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}
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}
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