87 lines
3.5 KiB
Java
87 lines
3.5 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.ArrayList;
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import java.util.List;
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/** Representation of a "method descriptor" (JVMS 4.3.3). */
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@SuppressWarnings({ "rawtypes", "unchecked" }) public
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class MethodDescriptor {
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/** The field descriptors of the method parameters. */
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public final String[] parameterFds;
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/** The field descriptor of the method return value. */
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public final String returnFd;
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/** */
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public
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MethodDescriptor(String[] parameterFds, String returnFd) {
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this.parameterFds = parameterFds;
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this.returnFd = returnFd;
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}
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/** Parse a method descriptor into parameter FDs and return FDs. */
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public
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MethodDescriptor(String s) {
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if (s.charAt(0) != '(') throw new JaninoRuntimeException();
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int from = 1;
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List<String> parameterFDs = new ArrayList();
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while (s.charAt(from) != ')') {
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int to = from;
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while (s.charAt(to) == '[') ++to;
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if ("BCDFIJSZ".indexOf(s.charAt(to)) != -1) {
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++to;
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} else
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if (s.charAt(to) == 'L') {
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for (++to; s.charAt(to) != ';'; ++to);
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++to;
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} else {
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throw new JaninoRuntimeException();
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}
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parameterFDs.add(s.substring(from, to));
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from = to;
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}
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this.parameterFds = (String[]) parameterFDs.toArray(new String[parameterFDs.size()]);
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this.returnFd = s.substring(++from);
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}
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/** @return The "method descriptor" (JVMS 4.3.3) */
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@Override public String
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toString() {
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StringBuilder sb = new StringBuilder("(");
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for (String parameterFd : this.parameterFds) sb.append(parameterFd);
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return sb.append(')').append(this.returnFd).toString();
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}
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/** Patches an additional parameter into a given method descriptor. */
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public static String
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prependParameter(String md, String parameterFd) { return '(' + parameterFd + md.substring(1); }
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}
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