nashorn/samples/javahelp.js
author amlu
Fri, 07 Jul 2017 12:42:53 +0800
changeset 45836 37379617f15a
parent 31193 f019295fdeb3
permissions -rw-r--r--
8183378: Refactor java/lang/System/MacEncoding/MacJNUEncoding.sh to java Reviewed-by: bchristi, xiaofeya
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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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// script helpers to print meta info on Java instances and classes
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// print instance methods info on a Java object or static methods info of a Java class
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function methods(jobj) {
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    if (! Java.isJavaObject(jobj)) {
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        throw new TypeError("not a Java object");
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    }
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    var isStatic = Java.isType(jobj);
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    var obj = Object.bindProperties({}, jobj);
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    for each (var i in obj) {
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        if (Java.isJavaMethod(i)) {
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            var str = String(i);
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            var idx = str.indexOf(' ');
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            var overloaded = str.substring(0, idx).endsWith("OverloadedDynamicMethod");
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            var lastIdx = isStatic? str.lastIndexOf('] on') : str.lastIndexOf(']');
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            print(str.substring(idx + 1, lastIdx) + (overloaded? "*" : ""))
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        }
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    }
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}
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// print instance field names of a Java object or static field names of a Java class
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function fields(jobj) {
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    if (! Java.isJavaObject(jobj)) {
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        throw new TypeError("not a Java object");
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    }
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    var obj = Object.bindProperties({}, jobj);
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    for (var i in obj) {
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        if (! Java.isJavaMethod(obj[i])) {
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            print(i);
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        }
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    }
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}