webit.script.asm3.commons.Method Maven / Gradle / Ivy
/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2007 INRIA, France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package webit.script.asm3.commons;
//import java.util.HashMap;
//import java.util.Map;
import webit.script.asm3.Type;
/**
* A named method descriptor.
*
* @author Juozas Baliuka
* @author Chris Nokleberg
* @author Eric Bruneton
*/
public class Method {
/**
* The method name.
*/
private final String name;
/**
* The method descriptor.
*/
private final String desc;
/**
* Return type of the method.
*/
private Type returnType;
/**
* Argument types of the method.
*/
private Type[] argumentTypes;
// /**
// * Maps primitive Java type names to their descriptors.
// */
// private static final Map DESCRIPTORS;
//
// static {
// DESCRIPTORS = new HashMap();
// DESCRIPTORS.put("void", 'V');
// DESCRIPTORS.put("byte", 'B');
// DESCRIPTORS.put("char", 'C');
// DESCRIPTORS.put("double", 'D');
// DESCRIPTORS.put("float", 'F');
// DESCRIPTORS.put("int", 'I');
// DESCRIPTORS.put("long", 'J');
// DESCRIPTORS.put("short", 'S');
// DESCRIPTORS.put("boolean", 'Z');
// }
/**
* Creates a new {@link Method}.
*
* @param name the method's name.
* @param desc the method's descriptor.
*/
public Method(final String name, final String desc) {
this.name = name;
this.desc = desc;
}
// /**
// * Creates a new {@link Method}.
// *
// * @param name the method's name.
// * @param returnType the method's return type.
// * @param argumentTypes the method's argument types.
// */
// public Method(
// final String name,
// final Type returnType,
// final Type[] argumentTypes)
// {
// this(name, Type.getMethodDescriptor(returnType, argumentTypes));
// }
/**
* Creates a new {@link Method}.
*
* @param m a java.lang.reflect method descriptor
* @return a {@link Method} corresponding to the given Java method
* declaration.
*/
public static Method getMethod(java.lang.reflect.Method m) {
return new Method(m.getName(), Type.getMethodDescriptor(m));
}
/**
* Creates a new {@link Method}.
*
* @param c a java.lang.reflect constructor descriptor
* @return a {@link Method} corresponding to the given Java constructor
* declaration.
*/
public static Method getMethod(java.lang.reflect.Constructor c) {
return new Method("", Type.getConstructorDescriptor(c));
}
// /**
// * Returns a {@link Method} corresponding to the given Java method
// * declaration.
// *
// * @param method a Java method declaration, without argument names, of the
// * form "returnType name (argumentType1, ... argumentTypeN)", where
// * the types are in plain Java (e.g. "int", "float",
// * "java.util.List", ...). Classes of the java.lang package can be
// * specified by their unqualified name; all other classes names must
// * be fully qualified.
// * @return a {@link Method} corresponding to the given Java method
// * declaration.
// * @throws IllegalArgumentException if method could not get
// * parsed.
// */
// public static Method getMethod(final String method)
// throws IllegalArgumentException
// {
// return getMethod(method, false);
// }
// /**
// * Returns a {@link Method} corresponding to the given Java method
// * declaration.
// *
// * @param method a Java method declaration, without argument names, of the
// * form "returnType name (argumentType1, ... argumentTypeN)", where
// * the types are in plain Java (e.g. "int", "float",
// * "java.util.List", ...). Classes of the java.lang package may be
// * specified by their unqualified name, depending on the
// * defaultPackage argument; all other classes names must be fully
// * qualified.
// * @param defaultPackage true if unqualified class names belong to the
// * default package, or false if they correspond to java.lang classes.
// * For instance "Object" means "Object" if this option is true, or
// * "java.lang.Object" otherwise.
// * @return a {@link Method} corresponding to the given Java method
// * declaration.
// * @throws IllegalArgumentException if method could not get
// * parsed.
// */
// public static Method getMethod(
// final String method,
// final boolean defaultPackage) throws IllegalArgumentException
// {
// int space = method.indexOf(' ');
// int start = method.indexOf('(', space) + 1;
// int end = method.indexOf(')', start);
// if (space == -1 || start == -1 || end == -1) {
// throw new IllegalArgumentException();
// }
// String returnType = method.substring(0, space);
// String methodName = method.substring(space + 1, start - 1).trim();
// StringBuilder sb = new StringBuilder();
// sb.append('(');
// int p;
// do {
// String s;
// p = method.indexOf(',', start);
// if (p == -1) {
// s = map(method.substring(start, end).trim(), defaultPackage);
// } else {
// s = map(method.substring(start, p).trim(), defaultPackage);
// start = p + 1;
// }
// sb.append(s);
// } while (p != -1);
// sb.append(')');
// sb.append(map(returnType, defaultPackage));
// return new Method(methodName, sb.toString());
// }
// private static String map(final String type, final boolean defaultPackage) {
// if ("".equals(type)) {
// return type;
// }
//
// StringBuilder sb = new StringBuilder(!defaultPackage ? type.length()+2 : type.length()+12);
// int index = 0;
// while ((index = type.indexOf("[]", index) + 1) > 0) {
// sb.append('[');
// }
//
// String t = type.substring(0, type.length() - sb.length() * 2);
// Character desc = DESCRIPTORS.get(t);
// if (desc != null) {
// sb.append(desc);
// } else {
// sb.append('L');
// if (t.indexOf('.') < 0) {
// if (!defaultPackage) {
// sb.append("java/lang/");
// }
// sb.append(t);
// } else {
// sb.append(t.replace('.', '/'));
// }
// sb.append(';');
// }
// return sb.toString();
// }
/**
* Returns the name of the method described by this object.
*
* @return the name of the method described by this object.
*/
public String getName() {
return name;
}
/**
* Returns the descriptor of the method described by this object.
*
* @return the descriptor of the method described by this object.
*/
public String getDescriptor() {
return desc;
}
private void checkTypes(){
if (returnType == null) {
char[] buf = desc.toCharArray();
returnType = Type.getType(buf, desc.indexOf(')') + 1);
argumentTypes = Type.getArgumentTypes(buf);
}
}
/**
* Returns the return type of the method described by this object.
*
* @return the return type of the method described by this object.
*/
public Type getReturnType() {
checkTypes();
return returnType;
}
/**
* Returns the argument types of the method described by this object.
*
* @return the argument types of the method described by this object.
*/
public Type[] getArgumentTypes() {
checkTypes();
return argumentTypes;
}
@Override
public String toString() {
return name + desc;
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (!(o instanceof Method)) {
return false;
}
Method other = (Method) o;
return name.equals(other.name) && desc.equals(other.desc);
}
@Override
public int hashCode() {
return name.hashCode() ^ desc.hashCode();
}
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