86 lines
3.7 KiB
Java
86 lines
3.7 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.util.Arrays;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Set;
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/**
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* A {@link org.codehaus.janino.util.resource.FileResourceFinder} that finds file resources in
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* a directory. The name of the file is constructed by concatenating a dirctory name
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* with the resource name such that slashes in the resource name map to file
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* separators.
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*/
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@SuppressWarnings({ "rawtypes", "unchecked" }) public
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class DirectoryResourceFinder extends FileResourceFinder {
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private final File directory;
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private final Map<String /*directoryName*/, Set<File>> subdirectoryNameToFiles = new HashMap();
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/** @param directory the directory to use as the search base */
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public
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DirectoryResourceFinder(File directory) { this.directory = directory; }
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@Override public final String toString() { return "dir:" + this.directory; }
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// Implement FileResourceFinder.
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@Override protected final File
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findResourceAsFile(String resourceName) {
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// Determine the subdirectory name (null for no subdirectory).
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int idx = resourceName.lastIndexOf('/');
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String subdirectoryName = (
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idx == -1 ? null :
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resourceName.substring(0, idx).replace('/', File.separatorChar)
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);
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// Determine files existing in this subdirectory.
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Set<File> files = (Set) this.subdirectoryNameToFiles.get(subdirectoryName);
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if (files == null) {
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File subDirectory = (
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subdirectoryName == null
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? this.directory
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: new File(this.directory, subdirectoryName)
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);
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File[] fa = subDirectory.listFiles();
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files = (fa == null) ? Collections.EMPTY_SET : new HashSet(Arrays.asList(fa));
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this.subdirectoryNameToFiles.put(subdirectoryName, files);
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}
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// Notice that "File.equals()" performs all the file-system dependent
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// magic like case conversion.
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File file = new File(this.directory, resourceName.replace('/', File.separatorChar));
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if (!files.contains(file)) return null;
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return file;
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}
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}
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