282 lines
9.3 KiB
Java
282 lines
9.3 KiB
Java
/***
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* ASM: a very small and fast Java bytecode manipulation framework
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* Copyright (c) 2000-2011 INRIA, France Telecom
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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
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. 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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* 2. 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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* 3. Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* 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 IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* 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
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.objectweb.asm.commons;
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import java.util.HashMap;
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import java.util.Map;
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import org.objectweb.asm.Type;
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/**
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* A named method descriptor.
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*
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* @author Juozas Baliuka
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* @author Chris Nokleberg
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* @author Eric Bruneton
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*/
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public class Method {
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/**
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* The method name.
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*/
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private final String name;
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/**
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* The method descriptor.
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*/
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private final String desc;
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/**
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* Maps primitive Java type names to their descriptors.
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*/
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private static final Map<String, String> DESCRIPTORS;
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static {
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DESCRIPTORS = new HashMap<String, String>();
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DESCRIPTORS.put("void", "V");
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DESCRIPTORS.put("byte", "B");
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DESCRIPTORS.put("char", "C");
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DESCRIPTORS.put("double", "D");
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DESCRIPTORS.put("float", "F");
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DESCRIPTORS.put("int", "I");
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DESCRIPTORS.put("long", "J");
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DESCRIPTORS.put("short", "S");
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DESCRIPTORS.put("boolean", "Z");
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}
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/**
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* Creates a new {@link Method}.
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*
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* @param name
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* the method's name.
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* @param desc
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* the method's descriptor.
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*/
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public Method(final String name, final String desc) {
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this.name = name;
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this.desc = desc;
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}
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/**
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* Creates a new {@link Method}.
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*
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* @param name
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* the method's name.
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* @param returnType
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* the method's return type.
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* @param argumentTypes
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* the method's argument types.
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*/
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public Method(final String name, final Type returnType,
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final Type[] argumentTypes) {
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this(name, Type.getMethodDescriptor(returnType, argumentTypes));
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}
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/**
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* Creates a new {@link Method}.
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*
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* @param m
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* a java.lang.reflect method descriptor
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* @return a {@link Method} corresponding to the given Java method
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* declaration.
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*/
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public static Method getMethod(java.lang.reflect.Method m) {
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return new Method(m.getName(), Type.getMethodDescriptor(m));
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}
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/**
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* Creates a new {@link Method}.
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*
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* @param c
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* a java.lang.reflect constructor descriptor
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* @return a {@link Method} corresponding to the given Java constructor
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* declaration.
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*/
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public static Method getMethod(java.lang.reflect.Constructor<?> c) {
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return new Method("<init>", Type.getConstructorDescriptor(c));
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}
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/**
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* Returns a {@link Method} corresponding to the given Java method
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* declaration.
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*
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* @param method
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* a Java method declaration, without argument names, of the form
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* "returnType name (argumentType1, ... argumentTypeN)", where
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* the types are in plain Java (e.g. "int", "float",
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* "java.util.List", ...). Classes of the java.lang package can
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* be specified by their unqualified name; all other classes
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* names must be fully qualified.
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* @return a {@link Method} corresponding to the given Java method
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* declaration.
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* @throws IllegalArgumentException
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* if <code>method</code> could not get parsed.
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*/
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public static Method getMethod(final String method)
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throws IllegalArgumentException {
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return getMethod(method, false);
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}
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/**
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* Returns a {@link Method} corresponding to the given Java method
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* declaration.
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*
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* @param method
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* a Java method declaration, without argument names, of the form
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* "returnType name (argumentType1, ... argumentTypeN)", where
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* the types are in plain Java (e.g. "int", "float",
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* "java.util.List", ...). Classes of the java.lang package may
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* be specified by their unqualified name, depending on the
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* defaultPackage argument; all other classes names must be fully
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* qualified.
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* @param defaultPackage
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* true if unqualified class names belong to the default package,
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* or false if they correspond to java.lang classes. For instance
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* "Object" means "Object" if this option is true, or
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* "java.lang.Object" otherwise.
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* @return a {@link Method} corresponding to the given Java method
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* declaration.
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* @throws IllegalArgumentException
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* if <code>method</code> could not get parsed.
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*/
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public static Method getMethod(final String method,
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final boolean defaultPackage) throws IllegalArgumentException {
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int space = method.indexOf(' ');
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int start = method.indexOf('(', space) + 1;
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int end = method.indexOf(')', start);
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if (space == -1 || start == -1 || end == -1) {
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throw new IllegalArgumentException();
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}
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String returnType = method.substring(0, space);
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String methodName = method.substring(space + 1, start - 1).trim();
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StringBuilder sb = new StringBuilder();
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sb.append('(');
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int p;
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do {
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String s;
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p = method.indexOf(',', start);
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if (p == -1) {
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s = map(method.substring(start, end).trim(), defaultPackage);
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} else {
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s = map(method.substring(start, p).trim(), defaultPackage);
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start = p + 1;
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}
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sb.append(s);
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} while (p != -1);
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sb.append(')');
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sb.append(map(returnType, defaultPackage));
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return new Method(methodName, sb.toString());
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}
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private static String map(final String type, final boolean defaultPackage) {
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if ("".equals(type)) {
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return type;
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}
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StringBuilder sb = new StringBuilder();
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int index = 0;
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while ((index = type.indexOf("[]", index) + 1) > 0) {
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sb.append('[');
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}
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String t = type.substring(0, type.length() - sb.length() * 2);
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String desc = DESCRIPTORS.get(t);
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if (desc != null) {
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sb.append(desc);
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} else {
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sb.append('L');
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if (t.indexOf('.') < 0) {
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if (!defaultPackage) {
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sb.append("java/lang/");
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}
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sb.append(t);
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} else {
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sb.append(t.replace('.', '/'));
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}
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sb.append(';');
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}
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return sb.toString();
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}
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/**
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* Returns the name of the method described by this object.
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*
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* @return the name of the method described by this object.
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*/
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public String getName() {
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return name;
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}
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/**
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* Returns the descriptor of the method described by this object.
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*
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* @return the descriptor of the method described by this object.
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*/
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public String getDescriptor() {
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return desc;
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}
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/**
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* Returns the return type of the method described by this object.
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*
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* @return the return type of the method described by this object.
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*/
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public Type getReturnType() {
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return Type.getReturnType(desc);
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}
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/**
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* Returns the argument types of the method described by this object.
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*
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* @return the argument types of the method described by this object.
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*/
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public Type[] getArgumentTypes() {
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return Type.getArgumentTypes(desc);
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}
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@Override
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public String toString() {
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return name + desc;
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}
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@Override
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public boolean equals(final Object o) {
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if (!(o instanceof Method)) {
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return false;
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}
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Method other = (Method) o;
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return name.equals(other.name) && desc.equals(other.desc);
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}
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@Override
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public int hashCode() {
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return name.hashCode() ^ desc.hashCode();
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}
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} |