2.4/dev/core/src/com/google/gwt/dev/asm/commons/Method.java - gwt - Git at Google

 /***
  * 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 com.google.gwt.dev.asm.commons;

 import com.google.gwt.dev.asm.Type;

 import java.util.HashMap;
 import java.util.Map;

 /**
  * 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;

     /**
      * 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));
     }

     /**
      * 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 <code>method</code> 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 <code>method</code> 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();
         StringBuffer sb = new StringBuffer();
         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;
         }

         StringBuffer sb = new StringBuffer();
         int index = 0;
         while ((index = type.indexOf("[]", index) + 1) > 0) {
             sb.append('[');
         }

         String t = type.substring(0, type.length() - sb.length() * 2);
         String desc = (String) 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;
     }

     /**
      * 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() {
         return Type.getReturnType(desc);
     }

     /**
      * 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() {
         return Type.getArgumentTypes(desc);
     }

     public String toString() {
         return name + desc;
     }

     public boolean equals(final Object o) {
         if (!(o instanceof Method)) {
             return false;
         }
         Method other = (Method) o;
         return name.equals(other.name) && desc.equals(other.desc);
     }

     public int hashCode() {
         return name.hashCode() ^ desc.hashCode();
     }
 }
	/***
	* 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 com.google.gwt.dev.asm.commons;

	import com.google.gwt.dev.asm.Type;

	import java.util.HashMap;
	import java.util.Map;

	/**
	* 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;

	/**
	* 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));
	}

	/**
	* 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 <code>method</code> 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 <code>method</code> 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();
	StringBuffer sb = new StringBuffer();
	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;
	}

	StringBuffer sb = new StringBuffer();
	int index = 0;
	while ((index = type.indexOf("[]", index) + 1) > 0) {
	sb.append('[');
	}

	String t = type.substring(0, type.length() - sb.length() * 2);
	String desc = (String) 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;
	}

	/**
	* 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() {
	return Type.getReturnType(desc);
	}

	/**
	* 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() {
	return Type.getArgumentTypes(desc);
	}

	public String toString() {
	return name + desc;
	}

	public boolean equals(final Object o) {
	if (!(o instanceof Method)) {
	return false;
	}
	Method other = (Method) o;
	return name.equals(other.name) && desc.equals(other.desc);
	}

	public int hashCode() {
	return name.hashCode() ^ desc.hashCode();
	}
	}