#// Usage: jjs -cp <asmtools.jar> jd.js -- <classname> [jdis|jdec]+
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/*+
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 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.+
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 *+
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 * Redistribution and use in source and binary forms, with or without+
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 * modification, are permitted provided that the following conditions+
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 * are met:+
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 *+
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 *   - Redistributions of source code must retain the above copyright+
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 *     notice, this list of conditions and the following disclaimer.+
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 *+
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 *   - Redistributions in binary form must reproduce the above copyright+
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 *     notice, this list of conditions and the following disclaimer in the+
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 *     documentation and/or other materials provided with the distribution.+
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 *+
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 *   - Neither the name of Oracle nor the names of its+
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 *     contributors may be used to endorse or promote products derived+
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 *     from this software without specific prior written permission.+
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 *+
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS+
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 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,+
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 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR+
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR+
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,+
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,+
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR+
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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF+
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING+
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 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS+
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.+
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 */+
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+
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// javap-like disassembler/decoder tool that disassembles/decodes +
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// java classes but with OpenJDK AsmTools disassembler/decoder syntax.+
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// You need to build asmtool.jar from OpenJDK codetools project+
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// specify it with -cp option.+
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+
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// See also https://wiki.openjdk.java.net/display/CodeTools/AsmTools+
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+
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function usage() {+
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    print("Usage: jjs -cp <asmtools.jar> jd.js -- <classname> [jdis|jdec]");+
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    exit(1);+
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}+
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+
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if (arguments.length == 0) {+
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    usage();+
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}+
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+
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// argument handling+
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// convert to internal class name+
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var className = arguments[0].replaceAll('\\.', '/');+
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var tool;+
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if (arguments.length > 1) {+
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    tool = arguments[1];+
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    switch (tool) {+
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        case 'jdis':+
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        case 'jdec':+
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            break;+
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        default:+
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            usage();+
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    }+
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} else {+
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    tool = "jdis"; // default tool+
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}+
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+
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// Java classes used+
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var AsmTools = Java.type("org.openjdk.asmtools.Main");+
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var Files = Java.type("java.nio.file.Files");+
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var StandardCopyOption = Java.type("java.nio.file.StandardCopyOption");+
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+
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// retrive input stream for .class bytes+
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var cl = AsmTools.class.classLoader;+
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var res = cl.getResource(className + ".class");+
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+
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if (res) {+
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    var is = res.openStream();+
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    var tmpPath;+
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    try {+
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        // copy the content of the .class to a temp file+
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        tmpPath = Files.createTempFile("asmtools-", ".class");+
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        // mark as delete-on-exit+
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        tmpPath.toFile().deleteOnExit();+
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        Files.copy(is, tmpPath, [ StandardCopyOption.REPLACE_EXISTING ]);+
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    } finally {+
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        is.close();+
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    } +
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+
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    // invoke asmtools Main+
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    AsmTools.main([ tool, tmpPath.toString() ]);+
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} else {+
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    print("no such class: " + arguments[0]);+
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    exit(1);+
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}+
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