75 lines
3.3 KiB
Java
75 lines
3.3 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;
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import java.util.Map;
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/** This {@link ClassLoader} allows for the loading of a set of Java™ classes provided in class file format. */
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@SuppressWarnings({ "rawtypes", "unchecked" }) public
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class ByteArrayClassLoader extends ClassLoader {
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/**
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* The given {@link Map} of classes must not be modified afterwards.
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*
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* @param classes String className => byte[] data
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*/
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public
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ByteArrayClassLoader(Map<String /*className*/, byte[] /*data*/> classes) { this.classes = classes; }
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/** @see #ByteArrayClassLoader(Map) */
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public
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ByteArrayClassLoader(Map<String /*className*/, byte[] /*data*/> classes, ClassLoader parent) {
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super(parent);
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this.classes = classes;
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}
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/**
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* Implements {@link ClassLoader#findClass(String)}.
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* <p>
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* Notice that, although nowhere documented, no more than one thread at a time calls this
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* method, because {@link ClassLoader#loadClass(java.lang.String)} is
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* <code>synchronized</code>.
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*/
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@Override protected Class
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findClass(String name) throws ClassNotFoundException {
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byte[] data = (byte[]) this.classes.get(name);
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if (data == null) throw new ClassNotFoundException(name);
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// Notice: Not inheriting the protection domain will cause problems with Java Web Start /
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// JNLP. See
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// http://jira.codehaus.org/browse/JANINO-104
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// http://www.nabble.com/-Help-jel--java.security.AccessControlException-to13073723.html
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return super.defineClass(
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name, // name
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data, 0, data.length, // b, off, len
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this.getClass().getProtectionDomain() // protectionDomain
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);
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}
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private final Map<String /*className*/, byte[] /*data*/> classes;
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}
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