1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/clojure/asm/Type.java	Sat Aug 21 06:25:44 2010 -0400
     1.3 @@ -0,0 +1,872 @@
     1.4 +/***
     1.5 + * ASM: a very small and fast Java bytecode manipulation framework
     1.6 + * Copyright (c) 2000-2005 INRIA, France Telecom
     1.7 + * All rights reserved.
     1.8 + *
     1.9 + * Redistribution and use in source and binary forms, with or without
    1.10 + * modification, are permitted provided that the following conditions
    1.11 + * are met:
    1.12 + * 1. Redistributions of source code must retain the above copyright
    1.13 + *    notice, this list of conditions and the following disclaimer.
    1.14 + * 2. Redistributions in binary form must reproduce the above copyright
    1.15 + *    notice, this list of conditions and the following disclaimer in the
    1.16 + *    documentation and/or other materials provided with the distribution.
    1.17 + * 3. Neither the name of the copyright holders nor the names of its
    1.18 + *    contributors may be used to endorse or promote products derived from
    1.19 + *    this software without specific prior written permission.
    1.20 + *
    1.21 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    1.22 + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    1.23 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    1.24 + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    1.25 + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    1.26 + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    1.27 + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    1.28 + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    1.29 + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    1.30 + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
    1.31 + * THE POSSIBILITY OF SUCH DAMAGE.
    1.32 + */
    1.33 +package clojure.asm;
    1.34 +
    1.35 +import java.lang.reflect.Constructor;
    1.36 +import java.lang.reflect.Method;
    1.37 +
    1.38 +/**
    1.39 + * A Java type. This class can be used to make it easier to manipulate type and
    1.40 + * method descriptors.
    1.41 + *
    1.42 + * @author Eric Bruneton
    1.43 + * @author Chris Nokleberg
    1.44 + */
    1.45 +public class Type{
    1.46 +
    1.47 +/**
    1.48 + * The sort of the <tt>void</tt> type. See {@link #getSort getSort}.
    1.49 + */
    1.50 +public final static int VOID = 0;
    1.51 +
    1.52 +/**
    1.53 + * The sort of the <tt>boolean</tt> type. See {@link #getSort getSort}.
    1.54 + */
    1.55 +public final static int BOOLEAN = 1;
    1.56 +
    1.57 +/**
    1.58 + * The sort of the <tt>char</tt> type. See {@link #getSort getSort}.
    1.59 + */
    1.60 +public final static int CHAR = 2;
    1.61 +
    1.62 +/**
    1.63 + * The sort of the <tt>byte</tt> type. See {@link #getSort getSort}.
    1.64 + */
    1.65 +public final static int BYTE = 3;
    1.66 +
    1.67 +/**
    1.68 + * The sort of the <tt>short</tt> type. See {@link #getSort getSort}.
    1.69 + */
    1.70 +public final static int SHORT = 4;
    1.71 +
    1.72 +/**
    1.73 + * The sort of the <tt>int</tt> type. See {@link #getSort getSort}.
    1.74 + */
    1.75 +public final static int INT = 5;
    1.76 +
    1.77 +/**
    1.78 + * The sort of the <tt>float</tt> type. See {@link #getSort getSort}.
    1.79 + */
    1.80 +public final static int FLOAT = 6;
    1.81 +
    1.82 +/**
    1.83 + * The sort of the <tt>long</tt> type. See {@link #getSort getSort}.
    1.84 + */
    1.85 +public final static int LONG = 7;
    1.86 +
    1.87 +/**
    1.88 + * The sort of the <tt>double</tt> type. See {@link #getSort getSort}.
    1.89 + */
    1.90 +public final static int DOUBLE = 8;
    1.91 +
    1.92 +/**
    1.93 + * The sort of array reference types. See {@link #getSort getSort}.
    1.94 + */
    1.95 +public final static int ARRAY = 9;
    1.96 +
    1.97 +/**
    1.98 + * The sort of object reference type. See {@link #getSort getSort}.
    1.99 + */
   1.100 +public final static int OBJECT = 10;
   1.101 +
   1.102 +/**
   1.103 + * The <tt>void</tt> type.
   1.104 + */
   1.105 +public final static Type VOID_TYPE = new Type(VOID);
   1.106 +
   1.107 +/**
   1.108 + * The <tt>boolean</tt> type.
   1.109 + */
   1.110 +public final static Type BOOLEAN_TYPE = new Type(BOOLEAN);
   1.111 +
   1.112 +/**
   1.113 + * The <tt>char</tt> type.
   1.114 + */
   1.115 +public final static Type CHAR_TYPE = new Type(CHAR);
   1.116 +
   1.117 +/**
   1.118 + * The <tt>byte</tt> type.
   1.119 + */
   1.120 +public final static Type BYTE_TYPE = new Type(BYTE);
   1.121 +
   1.122 +/**
   1.123 + * The <tt>short</tt> type.
   1.124 + */
   1.125 +public final static Type SHORT_TYPE = new Type(SHORT);
   1.126 +
   1.127 +/**
   1.128 + * The <tt>int</tt> type.
   1.129 + */
   1.130 +public final static Type INT_TYPE = new Type(INT);
   1.131 +
   1.132 +/**
   1.133 + * The <tt>float</tt> type.
   1.134 + */
   1.135 +public final static Type FLOAT_TYPE = new Type(FLOAT);
   1.136 +
   1.137 +/**
   1.138 + * The <tt>long</tt> type.
   1.139 + */
   1.140 +public final static Type LONG_TYPE = new Type(LONG);
   1.141 +
   1.142 +/**
   1.143 + * The <tt>double</tt> type.
   1.144 + */
   1.145 +public final static Type DOUBLE_TYPE = new Type(DOUBLE);
   1.146 +
   1.147 +// ------------------------------------------------------------------------
   1.148 +// Fields
   1.149 +// ------------------------------------------------------------------------
   1.150 +
   1.151 +/**
   1.152 + * The sort of this Java type.
   1.153 + */
   1.154 +private final int sort;
   1.155 +
   1.156 +/**
   1.157 + * A buffer containing the descriptor of this Java type. This field is only
   1.158 + * used for reference types.
   1.159 + */
   1.160 +private char[] buf;
   1.161 +
   1.162 +/**
   1.163 + * The offset of the descriptor of this Java type in {@link #buf buf}. This
   1.164 + * field is only used for reference types.
   1.165 + */
   1.166 +private int off;
   1.167 +
   1.168 +/**
   1.169 + * The length of the descriptor of this Java type.
   1.170 + */
   1.171 +private int len;
   1.172 +
   1.173 +// ------------------------------------------------------------------------
   1.174 +// Constructors
   1.175 +// ------------------------------------------------------------------------
   1.176 +
   1.177 +/**
   1.178 + * Constructs a primitive type.
   1.179 + *
   1.180 + * @param sort the sort of the primitive type to be constructed.
   1.181 + */
   1.182 +private Type(final int sort){
   1.183 +	this.sort = sort;
   1.184 +	this.len = 1;
   1.185 +}
   1.186 +
   1.187 +/**
   1.188 + * Constructs a reference type.
   1.189 + *
   1.190 + * @param sort the sort of the reference type to be constructed.
   1.191 + * @param buf  a buffer containing the descriptor of the previous type.
   1.192 + * @param off  the offset of this descriptor in the previous buffer.
   1.193 + * @param len  the length of this descriptor.
   1.194 + */
   1.195 +private Type(final int sort, final char[] buf, final int off, final int len){
   1.196 +	this.sort = sort;
   1.197 +	this.buf = buf;
   1.198 +	this.off = off;
   1.199 +	this.len = len;
   1.200 +}
   1.201 +
   1.202 +/**
   1.203 + * Returns the Java type corresponding to the given type descriptor.
   1.204 + *
   1.205 + * @param typeDescriptor a type descriptor.
   1.206 + * @return the Java type corresponding to the given type descriptor.
   1.207 + */
   1.208 +public static Type getType(final String typeDescriptor){
   1.209 +	return getType(typeDescriptor.toCharArray(), 0);
   1.210 +}
   1.211 +
   1.212 +/**
   1.213 + * Returns the Java type corresponding to the given class.
   1.214 + *
   1.215 + * @param c a class.
   1.216 + * @return the Java type corresponding to the given class.
   1.217 + */
   1.218 +public static Type getType(final Class c){
   1.219 +	if(c.isPrimitive())
   1.220 +		{
   1.221 +		if(c == Integer.TYPE)
   1.222 +			{
   1.223 +			return INT_TYPE;
   1.224 +			}
   1.225 +		else if(c == Void.TYPE)
   1.226 +			{
   1.227 +			return VOID_TYPE;
   1.228 +			}
   1.229 +		else if(c == Boolean.TYPE)
   1.230 +			{
   1.231 +			return BOOLEAN_TYPE;
   1.232 +			}
   1.233 +		else if(c == Byte.TYPE)
   1.234 +			{
   1.235 +			return BYTE_TYPE;
   1.236 +			}
   1.237 +		else if(c == Character.TYPE)
   1.238 +			{
   1.239 +			return CHAR_TYPE;
   1.240 +			}
   1.241 +		else if(c == Short.TYPE)
   1.242 +			{
   1.243 +			return SHORT_TYPE;
   1.244 +			}
   1.245 +		else if(c == Double.TYPE)
   1.246 +			{
   1.247 +			return DOUBLE_TYPE;
   1.248 +			}
   1.249 +		else if(c == Float.TYPE)
   1.250 +			{
   1.251 +			return FLOAT_TYPE;
   1.252 +			}
   1.253 +		else /* if (c == Long.TYPE) */
   1.254 +			{
   1.255 +			return LONG_TYPE;
   1.256 +			}
   1.257 +		}
   1.258 +	else
   1.259 +		{
   1.260 +		return getType(getDescriptor(c));
   1.261 +		}
   1.262 +}
   1.263 +
   1.264 +/**
   1.265 + * Returns the {@link Type#OBJECT} type for the given internal class name.
   1.266 + * This is a shortcut method for <code>Type.getType("L"+name+";")</code>.
   1.267 + * <i>Note that opposed to {@link Type#getType(String)}, this method takes
   1.268 + * internal class names and not class descriptor.</i>
   1.269 + *
   1.270 + * @param name an internal class name.
   1.271 + * @return the the {@link Type#OBJECT} type for the given class name.
   1.272 + */
   1.273 +public static Type getObjectType(String name){
   1.274 +	int l = name.length();
   1.275 +	char[] buf = new char[l + 2];
   1.276 +	buf[0] = 'L';
   1.277 +	buf[l + 1] = ';';
   1.278 +	name.getChars(0, l, buf, 1);
   1.279 +	return new Type(OBJECT, buf, 0, l + 2);
   1.280 +}
   1.281 +
   1.282 +/**
   1.283 + * Returns the Java types corresponding to the argument types of the given
   1.284 + * method descriptor.
   1.285 + *
   1.286 + * @param methodDescriptor a method descriptor.
   1.287 + * @return the Java types corresponding to the argument types of the given
   1.288 + *         method descriptor.
   1.289 + */
   1.290 +public static Type[] getArgumentTypes(final String methodDescriptor){
   1.291 +	char[] buf = methodDescriptor.toCharArray();
   1.292 +	int off = 1;
   1.293 +	int size = 0;
   1.294 +	while(true)
   1.295 +		{
   1.296 +		char car = buf[off++];
   1.297 +		if(car == ')')
   1.298 +			{
   1.299 +			break;
   1.300 +			}
   1.301 +		else if(car == 'L')
   1.302 +			{
   1.303 +			while(buf[off++] != ';')
   1.304 +				{
   1.305 +				}
   1.306 +			++size;
   1.307 +			}
   1.308 +		else if(car != '[')
   1.309 +			{
   1.310 +			++size;
   1.311 +			}
   1.312 +		}
   1.313 +	Type[] args = new Type[size];
   1.314 +	off = 1;
   1.315 +	size = 0;
   1.316 +	while(buf[off] != ')')
   1.317 +		{
   1.318 +		args[size] = getType(buf, off);
   1.319 +		off += args[size].len;
   1.320 +		size += 1;
   1.321 +		}
   1.322 +	return args;
   1.323 +}
   1.324 +
   1.325 +/**
   1.326 + * Returns the Java types corresponding to the argument types of the given
   1.327 + * method.
   1.328 + *
   1.329 + * @param method a method.
   1.330 + * @return the Java types corresponding to the argument types of the given
   1.331 + *         method.
   1.332 + */
   1.333 +public static Type[] getArgumentTypes(final Method method){
   1.334 +	Class[] classes = method.getParameterTypes();
   1.335 +	Type[] types = new Type[classes.length];
   1.336 +	for(int i = classes.length - 1; i >= 0; --i)
   1.337 +		{
   1.338 +		types[i] = getType(classes[i]);
   1.339 +		}
   1.340 +	return types;
   1.341 +}
   1.342 +
   1.343 +/**
   1.344 + * Returns the Java type corresponding to the return type of the given
   1.345 + * method descriptor.
   1.346 + *
   1.347 + * @param methodDescriptor a method descriptor.
   1.348 + * @return the Java type corresponding to the return type of the given
   1.349 + *         method descriptor.
   1.350 + */
   1.351 +public static Type getReturnType(final String methodDescriptor){
   1.352 +	char[] buf = methodDescriptor.toCharArray();
   1.353 +	return getType(buf, methodDescriptor.indexOf(')') + 1);
   1.354 +}
   1.355 +
   1.356 +/**
   1.357 + * Returns the Java type corresponding to the return type of the given
   1.358 + * method.
   1.359 + *
   1.360 + * @param method a method.
   1.361 + * @return the Java type corresponding to the return type of the given
   1.362 + *         method.
   1.363 + */
   1.364 +public static Type getReturnType(final Method method){
   1.365 +	return getType(method.getReturnType());
   1.366 +}
   1.367 +
   1.368 +/**
   1.369 + * Returns the Java type corresponding to the given type descriptor.
   1.370 + *
   1.371 + * @param buf a buffer containing a type descriptor.
   1.372 + * @param off the offset of this descriptor in the previous buffer.
   1.373 + * @return the Java type corresponding to the given type descriptor.
   1.374 + */
   1.375 +private static Type getType(final char[] buf, final int off){
   1.376 +	int len;
   1.377 +	switch(buf[off])
   1.378 +		{
   1.379 +		case'V':
   1.380 +			return VOID_TYPE;
   1.381 +		case'Z':
   1.382 +			return BOOLEAN_TYPE;
   1.383 +		case'C':
   1.384 +			return CHAR_TYPE;
   1.385 +		case'B':
   1.386 +			return BYTE_TYPE;
   1.387 +		case'S':
   1.388 +			return SHORT_TYPE;
   1.389 +		case'I':
   1.390 +			return INT_TYPE;
   1.391 +		case'F':
   1.392 +			return FLOAT_TYPE;
   1.393 +		case'J':
   1.394 +			return LONG_TYPE;
   1.395 +		case'D':
   1.396 +			return DOUBLE_TYPE;
   1.397 +		case'[':
   1.398 +			len = 1;
   1.399 +			while(buf[off + len] == '[')
   1.400 +				{
   1.401 +				++len;
   1.402 +				}
   1.403 +			if(buf[off + len] == 'L')
   1.404 +				{
   1.405 +				++len;
   1.406 +				while(buf[off + len] != ';')
   1.407 +					{
   1.408 +					++len;
   1.409 +					}
   1.410 +				}
   1.411 +			return new Type(ARRAY, buf, off, len + 1);
   1.412 +			// case 'L':
   1.413 +		default:
   1.414 +			len = 1;
   1.415 +			while(buf[off + len] != ';')
   1.416 +				{
   1.417 +				++len;
   1.418 +				}
   1.419 +			return new Type(OBJECT, buf, off, len + 1);
   1.420 +		}
   1.421 +}
   1.422 +
   1.423 +// ------------------------------------------------------------------------
   1.424 +// Accessors
   1.425 +// ------------------------------------------------------------------------
   1.426 +
   1.427 +/**
   1.428 + * Returns the sort of this Java type.
   1.429 + *
   1.430 + * @return {@link #VOID VOID}, {@link #BOOLEAN BOOLEAN},
   1.431 + *         {@link #CHAR CHAR}, {@link #BYTE BYTE}, {@link #SHORT SHORT},
   1.432 + *         {@link #INT INT}, {@link #FLOAT FLOAT}, {@link #LONG LONG},
   1.433 + *         {@link #DOUBLE DOUBLE}, {@link #ARRAY ARRAY} or
   1.434 + *         {@link #OBJECT OBJECT}.
   1.435 + */
   1.436 +public int getSort(){
   1.437 +	return sort;
   1.438 +}
   1.439 +
   1.440 +/**
   1.441 + * Returns the number of dimensions of this array type. This method should
   1.442 + * only be used for an array type.
   1.443 + *
   1.444 + * @return the number of dimensions of this array type.
   1.445 + */
   1.446 +public int getDimensions(){
   1.447 +	int i = 1;
   1.448 +	while(buf[off + i] == '[')
   1.449 +		{
   1.450 +		++i;
   1.451 +		}
   1.452 +	return i;
   1.453 +}
   1.454 +
   1.455 +/**
   1.456 + * Returns the type of the elements of this array type. This method should
   1.457 + * only be used for an array type.
   1.458 + *
   1.459 + * @return Returns the type of the elements of this array type.
   1.460 + */
   1.461 +public Type getElementType(){
   1.462 +	return getType(buf, off + getDimensions());
   1.463 +}
   1.464 +
   1.465 +/**
   1.466 + * Returns the name of the class corresponding to this type.
   1.467 + *
   1.468 + * @return the fully qualified name of the class corresponding to this type.
   1.469 + */
   1.470 +public String getClassName(){
   1.471 +	switch(sort)
   1.472 +		{
   1.473 +		case VOID:
   1.474 +			return "void";
   1.475 +		case BOOLEAN:
   1.476 +			return "boolean";
   1.477 +		case CHAR:
   1.478 +			return "char";
   1.479 +		case BYTE:
   1.480 +			return "byte";
   1.481 +		case SHORT:
   1.482 +			return "short";
   1.483 +		case INT:
   1.484 +			return "int";
   1.485 +		case FLOAT:
   1.486 +			return "float";
   1.487 +		case LONG:
   1.488 +			return "long";
   1.489 +		case DOUBLE:
   1.490 +			return "double";
   1.491 +		case ARRAY:
   1.492 +			StringBuffer b = new StringBuffer(getElementType().getClassName());
   1.493 +			for(int i = getDimensions(); i > 0; --i)
   1.494 +				{
   1.495 +				b.append("[]");
   1.496 +				}
   1.497 +			return b.toString();
   1.498 +			// case OBJECT:
   1.499 +		default:
   1.500 +			return new String(buf, off + 1, len - 2).replace('/', '.');
   1.501 +		}
   1.502 +}
   1.503 +
   1.504 +/**
   1.505 + * Returns the internal name of the class corresponding to this object type.
   1.506 + * The internal name of a class is its fully qualified name, where '.' are
   1.507 + * replaced by '/'. This method should only be used for an object type.
   1.508 + *
   1.509 + * @return the internal name of the class corresponding to this object type.
   1.510 + */
   1.511 +public String getInternalName(){
   1.512 +	return new String(buf, off + 1, len - 2);
   1.513 +}
   1.514 +
   1.515 +// ------------------------------------------------------------------------
   1.516 +// Conversion to type descriptors
   1.517 +// ------------------------------------------------------------------------
   1.518 +
   1.519 +/**
   1.520 + * Returns the descriptor corresponding to this Java type.
   1.521 + *
   1.522 + * @return the descriptor corresponding to this Java type.
   1.523 + */
   1.524 +public String getDescriptor(){
   1.525 +	StringBuffer buf = new StringBuffer();
   1.526 +	getDescriptor(buf);
   1.527 +	return buf.toString();
   1.528 +}
   1.529 +
   1.530 +/**
   1.531 + * Returns the descriptor corresponding to the given argument and return
   1.532 + * types.
   1.533 + *
   1.534 + * @param returnType    the return type of the method.
   1.535 + * @param argumentTypes the argument types of the method.
   1.536 + * @return the descriptor corresponding to the given argument and return
   1.537 + *         types.
   1.538 + */
   1.539 +public static String getMethodDescriptor(
   1.540 +		final Type returnType,
   1.541 +		final Type[] argumentTypes){
   1.542 +	StringBuffer buf = new StringBuffer();
   1.543 +	buf.append('(');
   1.544 +	for(int i = 0; i < argumentTypes.length; ++i)
   1.545 +		{
   1.546 +		argumentTypes[i].getDescriptor(buf);
   1.547 +		}
   1.548 +	buf.append(')');
   1.549 +	returnType.getDescriptor(buf);
   1.550 +	return buf.toString();
   1.551 +}
   1.552 +
   1.553 +/**
   1.554 + * Appends the descriptor corresponding to this Java type to the given
   1.555 + * string buffer.
   1.556 + *
   1.557 + * @param buf the string buffer to which the descriptor must be appended.
   1.558 + */
   1.559 +private void getDescriptor(final StringBuffer buf){
   1.560 +	switch(sort)
   1.561 +		{
   1.562 +		case VOID:
   1.563 +			buf.append('V');
   1.564 +			return;
   1.565 +		case BOOLEAN:
   1.566 +			buf.append('Z');
   1.567 +			return;
   1.568 +		case CHAR:
   1.569 +			buf.append('C');
   1.570 +			return;
   1.571 +		case BYTE:
   1.572 +			buf.append('B');
   1.573 +			return;
   1.574 +		case SHORT:
   1.575 +			buf.append('S');
   1.576 +			return;
   1.577 +		case INT:
   1.578 +			buf.append('I');
   1.579 +			return;
   1.580 +		case FLOAT:
   1.581 +			buf.append('F');
   1.582 +			return;
   1.583 +		case LONG:
   1.584 +			buf.append('J');
   1.585 +			return;
   1.586 +		case DOUBLE:
   1.587 +			buf.append('D');
   1.588 +			return;
   1.589 +			// case ARRAY:
   1.590 +			// case OBJECT:
   1.591 +		default:
   1.592 +			buf.append(this.buf, off, len);
   1.593 +		}
   1.594 +}
   1.595 +
   1.596 +// ------------------------------------------------------------------------
   1.597 +// Direct conversion from classes to type descriptors,
   1.598 +// without intermediate Type objects
   1.599 +// ------------------------------------------------------------------------
   1.600 +
   1.601 +/**
   1.602 + * Returns the internal name of the given class. The internal name of a
   1.603 + * class is its fully qualified name, where '.' are replaced by '/'.
   1.604 + *
   1.605 + * @param c an object class.
   1.606 + * @return the internal name of the given class.
   1.607 + */
   1.608 +public static String getInternalName(final Class c){
   1.609 +	return c.getName().replace('.', '/');
   1.610 +}
   1.611 +
   1.612 +/**
   1.613 + * Returns the descriptor corresponding to the given Java type.
   1.614 + *
   1.615 + * @param c an object class, a primitive class or an array class.
   1.616 + * @return the descriptor corresponding to the given class.
   1.617 + */
   1.618 +public static String getDescriptor(final Class c){
   1.619 +	StringBuffer buf = new StringBuffer();
   1.620 +	getDescriptor(buf, c);
   1.621 +	return buf.toString();
   1.622 +}
   1.623 +
   1.624 +/**
   1.625 + * Returns the descriptor corresponding to the given constructor.
   1.626 + *
   1.627 + * @param c a {@link Constructor Constructor} object.
   1.628 + * @return the descriptor of the given constructor.
   1.629 + */
   1.630 +public static String getConstructorDescriptor(final Constructor c){
   1.631 +	Class[] parameters = c.getParameterTypes();
   1.632 +	StringBuffer buf = new StringBuffer();
   1.633 +	buf.append('(');
   1.634 +	for(int i = 0; i < parameters.length; ++i)
   1.635 +		{
   1.636 +		getDescriptor(buf, parameters[i]);
   1.637 +		}
   1.638 +	return buf.append(")V").toString();
   1.639 +}
   1.640 +
   1.641 +/**
   1.642 + * Returns the descriptor corresponding to the given method.
   1.643 + *
   1.644 + * @param m a {@link Method Method} object.
   1.645 + * @return the descriptor of the given method.
   1.646 + */
   1.647 +public static String getMethodDescriptor(final Method m){
   1.648 +	Class[] parameters = m.getParameterTypes();
   1.649 +	StringBuffer buf = new StringBuffer();
   1.650 +	buf.append('(');
   1.651 +	for(int i = 0; i < parameters.length; ++i)
   1.652 +		{
   1.653 +		getDescriptor(buf, parameters[i]);
   1.654 +		}
   1.655 +	buf.append(')');
   1.656 +	getDescriptor(buf, m.getReturnType());
   1.657 +	return buf.toString();
   1.658 +}
   1.659 +
   1.660 +/**
   1.661 + * Appends the descriptor of the given class to the given string buffer.
   1.662 + *
   1.663 + * @param buf the string buffer to which the descriptor must be appended.
   1.664 + * @param c   the class whose descriptor must be computed.
   1.665 + */
   1.666 +private static void getDescriptor(final StringBuffer buf, final Class c){
   1.667 +	Class d = c;
   1.668 +	while(true)
   1.669 +		{
   1.670 +		if(d.isPrimitive())
   1.671 +			{
   1.672 +			char car;
   1.673 +			if(d == Integer.TYPE)
   1.674 +				{
   1.675 +				car = 'I';
   1.676 +				}
   1.677 +			else if(d == Void.TYPE)
   1.678 +				{
   1.679 +				car = 'V';
   1.680 +				}
   1.681 +			else if(d == Boolean.TYPE)
   1.682 +				{
   1.683 +				car = 'Z';
   1.684 +				}
   1.685 +			else if(d == Byte.TYPE)
   1.686 +				{
   1.687 +				car = 'B';
   1.688 +				}
   1.689 +			else if(d == Character.TYPE)
   1.690 +				{
   1.691 +				car = 'C';
   1.692 +				}
   1.693 +			else if(d == Short.TYPE)
   1.694 +				{
   1.695 +				car = 'S';
   1.696 +				}
   1.697 +			else if(d == Double.TYPE)
   1.698 +				{
   1.699 +				car = 'D';
   1.700 +				}
   1.701 +			else if(d == Float.TYPE)
   1.702 +				{
   1.703 +				car = 'F';
   1.704 +				}
   1.705 +			else /* if (d == Long.TYPE) */
   1.706 +				{
   1.707 +				car = 'J';
   1.708 +				}
   1.709 +			buf.append(car);
   1.710 +			return;
   1.711 +			}
   1.712 +		else if(d.isArray())
   1.713 +			{
   1.714 +			buf.append('[');
   1.715 +			d = d.getComponentType();
   1.716 +			}
   1.717 +		else
   1.718 +			{
   1.719 +			buf.append('L');
   1.720 +			String name = d.getName();
   1.721 +			int len = name.length();
   1.722 +			for(int i = 0; i < len; ++i)
   1.723 +				{
   1.724 +				char car = name.charAt(i);
   1.725 +				buf.append(car == '.' ? '/' : car);
   1.726 +				}
   1.727 +			buf.append(';');
   1.728 +			return;
   1.729 +			}
   1.730 +		}
   1.731 +}
   1.732 +
   1.733 +// ------------------------------------------------------------------------
   1.734 +// Corresponding size and opcodes
   1.735 +// ------------------------------------------------------------------------
   1.736 +
   1.737 +/**
   1.738 + * Returns the size of values of this type.
   1.739 + *
   1.740 + * @return the size of values of this type, i.e., 2 for <tt>long</tt> and
   1.741 + *         <tt>double</tt>, and 1 otherwise.
   1.742 + */
   1.743 +public int getSize(){
   1.744 +	return sort == LONG || sort == DOUBLE ? 2 : 1;
   1.745 +}
   1.746 +
   1.747 +/**
   1.748 + * Returns a JVM instruction opcode adapted to this Java type.
   1.749 + *
   1.750 + * @param opcode a JVM instruction opcode. This opcode must be one of ILOAD,
   1.751 + *               ISTORE, IALOAD, IASTORE, IADD, ISUB, IMUL, IDIV, IREM, INEG, ISHL,
   1.752 + *               ISHR, IUSHR, IAND, IOR, IXOR and IRETURN.
   1.753 + * @return an opcode that is similar to the given opcode, but adapted to
   1.754 + *         this Java type. For example, if this type is <tt>float</tt> and
   1.755 + *         <tt>opcode</tt> is IRETURN, this method returns FRETURN.
   1.756 + */
   1.757 +public int getOpcode(final int opcode){
   1.758 +	if(opcode == Opcodes.IALOAD || opcode == Opcodes.IASTORE)
   1.759 +		{
   1.760 +		switch(sort)
   1.761 +			{
   1.762 +			case BOOLEAN:
   1.763 +			case BYTE:
   1.764 +				return opcode + 5;
   1.765 +			case CHAR:
   1.766 +				return opcode + 6;
   1.767 +			case SHORT:
   1.768 +				return opcode + 7;
   1.769 +			case INT:
   1.770 +				return opcode;
   1.771 +			case FLOAT:
   1.772 +				return opcode + 2;
   1.773 +			case LONG:
   1.774 +				return opcode + 1;
   1.775 +			case DOUBLE:
   1.776 +				return opcode + 3;
   1.777 +				// case ARRAY:
   1.778 +				// case OBJECT:
   1.779 +			default:
   1.780 +				return opcode + 4;
   1.781 +			}
   1.782 +		}
   1.783 +	else
   1.784 +		{
   1.785 +		switch(sort)
   1.786 +			{
   1.787 +			case VOID:
   1.788 +				return opcode + 5;
   1.789 +			case BOOLEAN:
   1.790 +			case CHAR:
   1.791 +			case BYTE:
   1.792 +			case SHORT:
   1.793 +			case INT:
   1.794 +				return opcode;
   1.795 +			case FLOAT:
   1.796 +				return opcode + 2;
   1.797 +			case LONG:
   1.798 +				return opcode + 1;
   1.799 +			case DOUBLE:
   1.800 +				return opcode + 3;
   1.801 +				// case ARRAY:
   1.802 +				// case OBJECT:
   1.803 +			default:
   1.804 +				return opcode + 4;
   1.805 +			}
   1.806 +		}
   1.807 +}
   1.808 +
   1.809 +// ------------------------------------------------------------------------
   1.810 +// Equals, hashCode and toString
   1.811 +// ------------------------------------------------------------------------
   1.812 +
   1.813 +/**
   1.814 + * Tests if the given object is equal to this type.
   1.815 + *
   1.816 + * @param o the object to be compared to this type.
   1.817 + * @return <tt>true</tt> if the given object is equal to this type.
   1.818 + */
   1.819 +public boolean equals(final Object o){
   1.820 +	if(this == o)
   1.821 +		{
   1.822 +		return true;
   1.823 +		}
   1.824 +	if(!(o instanceof Type))
   1.825 +		{
   1.826 +		return false;
   1.827 +		}
   1.828 +	Type t = (Type) o;
   1.829 +	if(sort != t.sort)
   1.830 +		{
   1.831 +		return false;
   1.832 +		}
   1.833 +	if(sort == Type.OBJECT || sort == Type.ARRAY)
   1.834 +		{
   1.835 +		if(len != t.len)
   1.836 +			{
   1.837 +			return false;
   1.838 +			}
   1.839 +		for(int i = off, j = t.off, end = i + len; i < end; i++, j++)
   1.840 +			{
   1.841 +			if(buf[i] != t.buf[j])
   1.842 +				{
   1.843 +				return false;
   1.844 +				}
   1.845 +			}
   1.846 +		}
   1.847 +	return true;
   1.848 +}
   1.849 +
   1.850 +/**
   1.851 + * Returns a hash code value for this type.
   1.852 + *
   1.853 + * @return a hash code value for this type.
   1.854 + */
   1.855 +public int hashCode(){
   1.856 +	int hc = 13 * sort;
   1.857 +	if(sort == Type.OBJECT || sort == Type.ARRAY)
   1.858 +		{
   1.859 +		for(int i = off, end = i + len; i < end; i++)
   1.860 +			{
   1.861 +			hc = 17 * (hc + buf[i]);
   1.862 +			}
   1.863 +		}
   1.864 +	return hc;
   1.865 +}
   1.866 +
   1.867 +/**
   1.868 + * Returns a string representation of this type.
   1.869 + *
   1.870 + * @return the descriptor of this type.
   1.871 + */
   1.872 +public String toString(){
   1.873 +	return getDescriptor();
   1.874 +}
   1.875 +}