proguard.classfile.util.ClassUtil Maven / Gradle / Ivy
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2018 GuardSquare NV
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.util;
import proguard.classfile.*;
import java.util.List;
/**
* Utility methods for converting between internal and external representations
* of names and descriptions.
*
* @author Eric Lafortune
*/
public class ClassUtil
{
private static final String EMPTY_STRING = "";
/**
* Checks whether the given class magic number is correct.
* @param magicNumber the magic number.
* @throws UnsupportedOperationException when the magic number is incorrect.
*/
public static void checkMagicNumber(int magicNumber) throws UnsupportedOperationException
{
if (magicNumber != ClassConstants.MAGIC)
{
throw new UnsupportedOperationException("Invalid magic number ["+Integer.toHexString(magicNumber)+"] in class");
}
}
/**
* Returns the combined class version number.
* @param majorVersion the major part of the class version number.
* @param minorVersion the minor part of the class version number.
* @return the combined class version number.
*/
public static int internalClassVersion(int majorVersion, int minorVersion)
{
return (majorVersion << 16) | minorVersion;
}
/**
* Returns the major part of the given class version number.
* @param internalClassVersion the combined class version number.
* @return the major part of the class version number.
*/
public static int internalMajorClassVersion(int internalClassVersion)
{
return internalClassVersion >>> 16;
}
/**
* Returns the internal class version number.
* @param internalClassVersion the external class version number.
* @return the internal class version number.
*/
public static int internalMinorClassVersion(int internalClassVersion)
{
return internalClassVersion & 0xffff;
}
/**
* Returns the internal class version number.
* @param externalClassVersion the external class version number.
* @return the internal class version number.
*/
public static int internalClassVersion(String externalClassVersion)
{
return
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_0) ||
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_1) ? ClassConstants.CLASS_VERSION_1_0 :
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_2) ? ClassConstants.CLASS_VERSION_1_2 :
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_3) ? ClassConstants.CLASS_VERSION_1_3 :
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_4) ? ClassConstants.CLASS_VERSION_1_4 :
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_5_ALIAS) ||
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_5) ? ClassConstants.CLASS_VERSION_1_5 :
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_6_ALIAS) ||
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_6) ? ClassConstants.CLASS_VERSION_1_6 :
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_7_ALIAS) ||
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_7) ? ClassConstants.CLASS_VERSION_1_7 :
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_8_ALIAS) ||
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_8) ? ClassConstants.CLASS_VERSION_1_8 :
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_9_ALIAS) ||
externalClassVersion.equals(JavaConstants.CLASS_VERSION_1_9) ? ClassConstants.CLASS_VERSION_1_9 :
0;
}
/**
* Returns the minor part of the given class version number.
* @param internalClassVersion the combined class version number.
* @return the minor part of the class version number.
*/
public static String externalClassVersion(int internalClassVersion)
{
switch (internalClassVersion)
{
case ClassConstants.CLASS_VERSION_1_0: return JavaConstants.CLASS_VERSION_1_0;
case ClassConstants.CLASS_VERSION_1_2: return JavaConstants.CLASS_VERSION_1_2;
case ClassConstants.CLASS_VERSION_1_3: return JavaConstants.CLASS_VERSION_1_3;
case ClassConstants.CLASS_VERSION_1_4: return JavaConstants.CLASS_VERSION_1_4;
case ClassConstants.CLASS_VERSION_1_5: return JavaConstants.CLASS_VERSION_1_5;
case ClassConstants.CLASS_VERSION_1_6: return JavaConstants.CLASS_VERSION_1_6;
case ClassConstants.CLASS_VERSION_1_7: return JavaConstants.CLASS_VERSION_1_7;
case ClassConstants.CLASS_VERSION_1_8: return JavaConstants.CLASS_VERSION_1_8;
case ClassConstants.CLASS_VERSION_1_9: return JavaConstants.CLASS_VERSION_1_9;
default: return null;
}
}
/**
* Checks whether the given class version number is supported.
* @param internalClassVersion the combined class version number.
* @throws UnsupportedOperationException when the version is not supported.
*/
public static void checkVersionNumbers(int internalClassVersion) throws UnsupportedOperationException
{
if (internalClassVersion < ClassConstants.CLASS_VERSION_1_0 ||
internalClassVersion > ClassConstants.CLASS_VERSION_1_9)
{
throw new UnsupportedOperationException("Unsupported version number ["+
internalMajorClassVersion(internalClassVersion)+"."+
internalMinorClassVersion(internalClassVersion)+"] (maximum "+
ClassConstants.CLASS_VERSION_1_9_MAJOR+"."+
ClassConstants.CLASS_VERSION_1_9_MINOR+", Java "+
JavaConstants.CLASS_VERSION_1_9+")");
}
}
/**
* Converts an external class name into an internal class name.
* @param externalClassName the external class name,
* e.g. "java.lang.Object"
* @return the internal class name,
* e.g. "java/lang/Object".
*/
public static String internalClassName(String externalClassName)
{
return externalClassName.replace(JavaConstants.PACKAGE_SEPARATOR,
ClassConstants.PACKAGE_SEPARATOR);
}
/**
* Converts an internal class description into an external class description.
* @param accessFlags the access flags of the class.
* @param internalClassName the internal class name,
* e.g. "java/lang/Object".
* @return the external class description,
* e.g. "public java.lang.Object".
*/
public static String externalFullClassDescription(int accessFlags,
String internalClassName)
{
return externalClassAccessFlags(accessFlags) +
externalClassName(internalClassName);
}
/**
* Converts an internal class name into an external class name.
* @param internalClassName the internal class name,
* e.g. "java/lang/Object".
* @return the external class name,
* e.g. "java.lang.Object".
*/
public static String externalClassName(String internalClassName)
{
return //internalClassName.startsWith(ClassConstants.PACKAGE_JAVA_LANG) &&
//internalClassName.indexOf(ClassConstants.PACKAGE_SEPARATOR, ClassConstants.PACKAGE_JAVA_LANG.length() + 1) < 0 ?
//internalClassName.substring(ClassConstants.PACKAGE_JAVA_LANG.length()) :
internalClassName.replace(ClassConstants.PACKAGE_SEPARATOR,
JavaConstants.PACKAGE_SEPARATOR);
}
/**
* Returns the external base type of an external array type, dropping any
* array brackets.
* @param externalArrayType the external array type,
* e.g. "java.lang.Object[][]"
* @return the external base type,
* e.g. "java.lang.Object".
*/
public static String externalBaseType(String externalArrayType)
{
int index = externalArrayType.indexOf(JavaConstants.TYPE_ARRAY);
return index >= 0 ?
externalArrayType.substring(0, index) :
externalArrayType;
}
/**
* Returns the external short class name of an external class name, dropping
* the package specification.
* @param externalClassName the external class name,
* e.g. "java.lang.Object"
* @return the external short class name,
* e.g. "Object".
*/
public static String externalShortClassName(String externalClassName)
{
int index = externalClassName.lastIndexOf(JavaConstants.PACKAGE_SEPARATOR);
return externalClassName.substring(index+1);
}
/**
* Returns whether the given internal type is an array type.
* @param internalType the internal type,
* e.g. "[[Ljava/lang/Object;".
* @return true if the given type is an array type,
* false otherwise.
*/
public static boolean isInternalArrayType(String internalType)
{
return internalType.length() > 1 &&
internalType.charAt(0) == ClassConstants.TYPE_ARRAY;
}
/**
* Returns the number of dimensions of the given internal type.
* @param internalType the internal type,
* e.g. "[[Ljava/lang/Object;".
* @return the number of dimensions, e.g. 2.
*/
public static int internalArrayTypeDimensionCount(String internalType)
{
int dimensions = 0;
while (internalType.charAt(dimensions) == ClassConstants.TYPE_ARRAY)
{
dimensions++;
}
return dimensions;
}
/**
* Returns whether the given internal class name is one of the interfaces
* that is implemented by all array types. These class names are
* "java/lang/Object", "java/lang/Cloneable", and
* "java/io/Serializable"
* @param internalClassName the internal class name,
* e.g. "java/lang/Object".
* @return true if the given type is an array interface name,
* false otherwise.
*/
public static boolean isInternalArrayInterfaceName(String internalClassName)
{
return ClassConstants.NAME_JAVA_LANG_OBJECT.equals(internalClassName) ||
ClassConstants.NAME_JAVA_LANG_CLONEABLE.equals(internalClassName) ||
ClassConstants.NAME_JAVA_IO_SERIALIZABLE.equals(internalClassName);
}
/**
* Returns whether the given internal type is a plain primitive type
* (not void).
* @param internalType the internal type,
* e.g. "I".
* @return true if the given type is a class type,
* false otherwise.
*/
public static boolean isInternalPrimitiveType(char internalType)
{
return internalType == ClassConstants.TYPE_BOOLEAN ||
internalType == ClassConstants.TYPE_BYTE ||
internalType == ClassConstants.TYPE_CHAR ||
internalType == ClassConstants.TYPE_SHORT ||
internalType == ClassConstants.TYPE_INT ||
internalType == ClassConstants.TYPE_FLOAT ||
internalType == ClassConstants.TYPE_LONG ||
internalType == ClassConstants.TYPE_DOUBLE;
}
/**
* Returns whether the given internal type is a plain primitive type
* (not void).
* @param internalType the internal type,
* e.g. "I".
* @return true if the given type is a class type,
* false otherwise.
*/
public static boolean isInternalPrimitiveType(String internalType)
{
return isInternalPrimitiveType(internalType.charAt(0));
}
/**
* Returns whether the given internal type is a primitive Category 2 type.
* @param internalType the internal type,
* e.g. "L".
* @return true if the given type is a Category 2 type,
* false otherwise.
*/
public static boolean isInternalCategory2Type(String internalType)
{
return internalType.length() == 1 &&
(internalType.charAt(0) == ClassConstants.TYPE_LONG ||
internalType.charAt(0) == ClassConstants.TYPE_DOUBLE);
}
/**
* Returns whether the given internal type is a plain class type
* (including an array type of a plain class type).
* @param internalType the internal type,
* e.g. "Ljava/lang/Object;".
* @return true if the given type is a class type,
* false otherwise.
*/
public static boolean isInternalClassType(String internalType)
{
int length = internalType.length();
return length > 1 &&
// internalType.charAt(0) == ClassConstants.TYPE_CLASS_START &&
internalType.charAt(length-1) == ClassConstants.TYPE_CLASS_END;
}
/**
* Returns the internal type of a given class name.
* @param internalClassName the internal class name,
* e.g. "java/lang/Object".
* @return the internal type,
* e.g. "Ljava/lang/Object;".
*/
public static String internalTypeFromClassName(String internalClassName)
{
return internalArrayTypeFromClassName(internalClassName, 0);
}
/**
* Returns the internal array type of a given class name with a given number
* of dimensions. If the number of dimensions is 0, the class name itself is
* returned.
* @param internalClassName the internal class name,
* e.g. "java/lang/Object".
* @param dimensionCount the number of array dimensions.
* @return the internal array type of the array elements,
* e.g. "Ljava/lang/Object;".
*/
public static String internalArrayTypeFromClassName(String internalClassName,
int dimensionCount)
{
StringBuffer buffer = new StringBuffer(internalClassName.length() + dimensionCount + 2);
for (int dimension = 0; dimension < dimensionCount; dimension++)
{
buffer.append(ClassConstants.TYPE_ARRAY);
}
return buffer.append(ClassConstants.TYPE_CLASS_START)
.append(internalClassName)
.append(ClassConstants.TYPE_CLASS_END)
.toString();
}
/**
* Returns the internal array type of a given type, with a given number of
* additional dimensions.
* @param internalType the internal class name,
* e.g. "[Ljava/lang/Object;".
* @param dimensionDelta the number of additional array dimensions,
* e.g. 1.
* @return the internal array type of the array elements,
* e.g. "[[Ljava/lang/Object;".
*/
public static String internalArrayTypeFromType(String internalType,
int dimensionDelta)
{
StringBuffer buffer = new StringBuffer(internalType.length() + dimensionDelta);
for (int dimension = 0; dimension < dimensionDelta; dimension++)
{
buffer.append(ClassConstants.TYPE_ARRAY);
}
return buffer.append(internalType).toString();
}
/**
* Returns the internal element type of a given internal array type.
* @param internalArrayType the internal array type,
* e.g. "[[Ljava/lang/Object;" or
* "[I".
* @return the internal type of the array elements,
* e.g. "Ljava/lang/Object;" or
* "I".
*/
public static String internalTypeFromArrayType(String internalArrayType)
{
int index = internalArrayType.lastIndexOf(ClassConstants.TYPE_ARRAY);
return internalArrayType.substring(index + 1);
}
/**
* Returns the internal class type (class name or array type) of a given
* internal type (including an array type). This is the type that can be
* stored in a class constant.
* @param internalType the internal class type,
* e.g. "[I",
* "[Ljava/lang/Object;", or
* "Ljava/lang/Object;".
* @return the internal class name,
* e.g. "[I",
* "[Ljava/lang/Object;", or
* "java/lang/Object".
*/
public static String internalClassTypeFromType(String internalType)
{
return isInternalArrayType(internalType) ?
internalType :
internalClassNameFromClassType(internalType);
}
/**
* Returns the internal type of of a given class type (class name or array
* type). This is the type that can be stored in a class constant.
* @param internalType the internal class type,
* e.g. "[I",
* "[Ljava/lang/Object;", or
* "java/lang/Object".
* @return the internal class name,
* e.g. "[I",
* "[Ljava/lang/Object;", or
* "Ljava/lang/Object;".
*/
public static String internalTypeFromClassType(String internalType)
{
return isInternalArrayType(internalType) ?
internalType :
internalTypeFromClassName(internalType);
}
/**
* Returns the internal class name of a given internal class type
* (including an array type). Types involving primitive types are returned
* unchanged.
* @param internalClassType the internal class type,
* e.g. "[Ljava/lang/Object;",
* "Ljava/lang/Object;", or
* "java/lang/Object".
* @return the internal class name,
* e.g. "java/lang/Object".
*/
public static String internalClassNameFromClassType(String internalClassType)
{
return isInternalClassType(internalClassType) ?
internalClassType.substring(internalClassType.indexOf(ClassConstants.TYPE_CLASS_START)+1,
internalClassType.length()-1) :
internalClassType;
}
/**
* Returns the internal class name of any given internal descriptor type,
* disregarding array prefixes.
* @param internalClassType the internal class type,
* e.g. "Ljava/lang/Object;" or
* "[[I".
* @return the internal class name,
* e.g. "java/lang/Object" or
* null.
*/
public static String internalClassNameFromType(String internalClassType)
{
if (!isInternalClassType(internalClassType))
{
return null;
}
// Is it an array type?
if (isInternalArrayType(internalClassType))
{
internalClassType = internalTypeFromArrayType(internalClassType);
}
return internalClassNameFromClassType(internalClassType);
}
/**
* Returns the internal numeric (or void or array) class name corresponding
* to the given internal primitive type.
* @param internalPrimitiveType the internal class type,
* e.g. "I" or
* "V".
* @return the internal class name,
* e.g. "java/lang/Integer" or
* java/lang/Void.
*/
public static String internalNumericClassNameFromPrimitiveType(char internalPrimitiveType)
{
switch (internalPrimitiveType)
{
case ClassConstants.TYPE_VOID: return ClassConstants.NAME_JAVA_LANG_VOID;
case ClassConstants.TYPE_BOOLEAN: return ClassConstants.NAME_JAVA_LANG_BOOLEAN;
case ClassConstants.TYPE_BYTE: return ClassConstants.NAME_JAVA_LANG_BYTE;
case ClassConstants.TYPE_CHAR: return ClassConstants.NAME_JAVA_LANG_CHARACTER;
case ClassConstants.TYPE_SHORT: return ClassConstants.NAME_JAVA_LANG_SHORT;
case ClassConstants.TYPE_INT: return ClassConstants.NAME_JAVA_LANG_INTEGER;
case ClassConstants.TYPE_LONG: return ClassConstants.NAME_JAVA_LANG_LONG;
case ClassConstants.TYPE_FLOAT: return ClassConstants.NAME_JAVA_LANG_FLOAT;
case ClassConstants.TYPE_DOUBLE: return ClassConstants.NAME_JAVA_LANG_DOUBLE;
case ClassConstants.TYPE_ARRAY: return ClassConstants.NAME_JAVA_LANG_REFLECT_ARRAY;
default:
throw new IllegalArgumentException("Unexpected primitive type ["+internalPrimitiveType+"]");
}
}
/**
* Returns the internal numeric (or void or array) class name corresponding
* to the given internal primitive type.
* @param internalPrimitiveClassName the internal class name,
* e.g. "java/lang/Integer" or
* java/lang/Void.
* @return the internal class type,
* e.g. "I" or
* "V".
*/
public static char internalPrimitiveTypeFromNumericClassName(String internalPrimitiveClassName)
{
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_VOID)) return ClassConstants.TYPE_VOID;
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_BOOLEAN)) return ClassConstants.TYPE_BOOLEAN;
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_BYTE)) return ClassConstants.TYPE_BYTE;
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_CHARACTER)) return ClassConstants.TYPE_CHAR;
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_SHORT)) return ClassConstants.TYPE_SHORT;
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_INTEGER)) return ClassConstants.TYPE_INT;
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_LONG)) return ClassConstants.TYPE_LONG;
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_FLOAT)) return ClassConstants.TYPE_FLOAT;
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_DOUBLE)) return ClassConstants.TYPE_DOUBLE;
if (internalPrimitiveClassName.equals(ClassConstants.NAME_JAVA_LANG_REFLECT_ARRAY)) return ClassConstants.TYPE_ARRAY;
throw new IllegalArgumentException("Unexpected primitive class name ["+internalPrimitiveClassName+"]");
}
/**
* Returns whether the given method name refers to a class initializer or
* an instance initializer.
* @param internalMethodName the internal method name,
* e.g. "<clinit>".
* @return whether the method name refers to an initializer,
* e.g. true.
*/
public static boolean isInitializer(String internalMethodName)
{
return internalMethodName.equals(ClassConstants.METHOD_NAME_CLINIT) ||
internalMethodName.equals(ClassConstants.METHOD_NAME_INIT);
}
/**
* Returns the internal type of the given internal method descriptor.
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(II)Z".
* @return the internal return type,
* e.g. "Z".
*/
public static String internalMethodReturnType(String internalMethodDescriptor)
{
int index = internalMethodDescriptor.indexOf(ClassConstants.METHOD_ARGUMENTS_CLOSE);
return internalMethodDescriptor.substring(index + 1);
}
/**
* Returns the number of parameters of the given internal method descriptor.
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(ID)Z".
* @return the number of parameters,
* e.g. 2.
*/
public static int internalMethodParameterCount(String internalMethodDescriptor)
{
return internalMethodParameterCount(internalMethodDescriptor, true);
}
/**
* Returns the number of parameters of the given internal method descriptor.
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(ID)Z".
* @param accessFlags the access flags of the method,
* e.g. 0.
* @return the number of parameters,
* e.g. 3.
*/
public static int internalMethodParameterCount(String internalMethodDescriptor,
int accessFlags)
{
return internalMethodParameterCount(internalMethodDescriptor,
(accessFlags & ClassConstants.ACC_STATIC) != 0);
}
/**
* Returns the number of parameters of the given internal method descriptor.
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(ID)Z".
* @param isStatic specifies whether the method is static,
* e.g. false.
* @return the number of parameters,
* e.g. 3.
*/
public static int internalMethodParameterCount(String internalMethodDescriptor,
boolean isStatic)
{
int counter = isStatic ? 0 : 1;
int index = 1;
while (true)
{
char c = internalMethodDescriptor.charAt(index++);
switch (c)
{
case ClassConstants.TYPE_ARRAY:
{
// Just ignore all array characters.
break;
}
case ClassConstants.TYPE_CLASS_START:
{
counter++;
// Skip the class name.
index = internalMethodDescriptor.indexOf(ClassConstants.TYPE_CLASS_END, index) + 1;
break;
}
default:
{
counter++;
break;
}
case ClassConstants.METHOD_ARGUMENTS_CLOSE:
{
return counter;
}
}
}
}
/**
* Returns the size taken up on the stack by the parameters of the given
* internal method descriptor. This accounts for long and double parameters
* taking up two entries.
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(ID)Z".
* @return the size taken up on the stack,
* e.g. 3.
*/
public static int internalMethodParameterSize(String internalMethodDescriptor)
{
return internalMethodParameterSize(internalMethodDescriptor, true);
}
/**
* Returns the size taken up on the stack by the parameters of the given
* internal method descriptor. This accounts for long and double parameters
* taking up two entries, and a non-static method taking up an additional
* entry.
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(ID)Z".
* @param accessFlags the access flags of the method,
* e.g. 0.
* @return the size taken up on the stack,
* e.g. 4.
*/
public static int internalMethodParameterSize(String internalMethodDescriptor,
int accessFlags)
{
return internalMethodParameterSize(internalMethodDescriptor,
(accessFlags & ClassConstants.ACC_STATIC) != 0);
}
/**
* Returns the size taken up on the stack by the parameters of the given
* internal method descriptor. This accounts for long and double parameters
* taking up two spaces, and a non-static method taking up an additional
* entry.
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(ID)Z".
* @param isStatic specifies whether the method is static,
* e.g. false.
* @return the size taken up on the stack,
* e.g. 4.
*/
public static int internalMethodParameterSize(String internalMethodDescriptor,
boolean isStatic)
{
int size = isStatic ? 0 : 1;
int index = 1;
while (true)
{
char c = internalMethodDescriptor.charAt(index++);
switch (c)
{
case ClassConstants.TYPE_LONG:
case ClassConstants.TYPE_DOUBLE:
{
size += 2;
break;
}
case ClassConstants.TYPE_CLASS_START:
{
size++;
// Skip the class name.
index = internalMethodDescriptor.indexOf(ClassConstants.TYPE_CLASS_END, index) + 1;
break;
}
case ClassConstants.TYPE_ARRAY:
{
size++;
// Skip all array characters.
while ((c = internalMethodDescriptor.charAt(index++)) == ClassConstants.TYPE_ARRAY) {}
if (c == ClassConstants.TYPE_CLASS_START)
{
// Skip the class type.
index = internalMethodDescriptor.indexOf(ClassConstants.TYPE_CLASS_END, index) + 1;
}
break;
}
default:
{
size++;
break;
}
case ClassConstants.METHOD_ARGUMENTS_CLOSE:
{
return size;
}
}
}
}
/**
* Returns the size taken up on the stack by the given internal type.
* The size is 1, except for long and double types, for which it is 2,
* and for the void type, for which 0 is returned.
* @param internalType the internal type,
* e.g. "I".
* @return the size taken up on the stack,
* e.g. 1.
*/
public static int internalTypeSize(String internalType)
{
if (internalType.length() == 1)
{
char internalPrimitiveType = internalType.charAt(0);
if (internalPrimitiveType == ClassConstants.TYPE_LONG ||
internalPrimitiveType == ClassConstants.TYPE_DOUBLE)
{
return 2;
}
else if (internalPrimitiveType == ClassConstants.TYPE_VOID)
{
return 0;
}
}
return 1;
}
/**
* Converts an external type into an internal type.
* @param externalType the external type,
* e.g. "java.lang.Object[][]" or
* "int[]".
* @return the internal type,
* e.g. "[[Ljava/lang/Object;" or
* "[I".
*/
public static String internalType(String externalType)
{
// Strip the array part, if any.
int dimensionCount = externalArrayTypeDimensionCount(externalType);
if (dimensionCount > 0)
{
externalType = externalType.substring(0, externalType.length() - dimensionCount * JavaConstants.TYPE_ARRAY.length());
}
// Analyze the actual type part.
char internalTypeChar =
externalType.equals(JavaConstants.TYPE_VOID ) ? ClassConstants.TYPE_VOID :
externalType.equals(JavaConstants.TYPE_BOOLEAN) ? ClassConstants.TYPE_BOOLEAN :
externalType.equals(JavaConstants.TYPE_BYTE ) ? ClassConstants.TYPE_BYTE :
externalType.equals(JavaConstants.TYPE_CHAR ) ? ClassConstants.TYPE_CHAR :
externalType.equals(JavaConstants.TYPE_SHORT ) ? ClassConstants.TYPE_SHORT :
externalType.equals(JavaConstants.TYPE_INT ) ? ClassConstants.TYPE_INT :
externalType.equals(JavaConstants.TYPE_FLOAT ) ? ClassConstants.TYPE_FLOAT :
externalType.equals(JavaConstants.TYPE_LONG ) ? ClassConstants.TYPE_LONG :
externalType.equals(JavaConstants.TYPE_DOUBLE ) ? ClassConstants.TYPE_DOUBLE :
externalType.equals("%" ) ? '%' :
(char)0;
String internalType =
internalTypeChar != 0 ? String.valueOf(internalTypeChar) :
ClassConstants.TYPE_CLASS_START +
internalClassName(externalType) +
ClassConstants.TYPE_CLASS_END;
// Prepend the array part, if any.
for (int count = 0; count < dimensionCount; count++)
{
internalType = ClassConstants.TYPE_ARRAY + internalType;
}
return internalType;
}
/**
* Returns the number of dimensions of the given external type.
* @param externalType the external type,
* e.g. "[[Ljava/lang/Object;".
* @return the number of dimensions, e.g. 2.
*/
public static int externalArrayTypeDimensionCount(String externalType)
{
int dimensions = 0;
int length = JavaConstants.TYPE_ARRAY.length();
int offset = externalType.length() - length;
while (externalType.regionMatches(offset,
JavaConstants.TYPE_ARRAY,
0,
length))
{
dimensions++;
offset -= length;
}
return dimensions;
}
/**
* Converts an internal type into an external type.
* @param internalType the internal type,
* e.g. "Ljava/lang/Object;" or
* "[[Ljava/lang/Object;" or
* "[I".
* @return the external type,
* e.g. "java.lang.Object" or
* "java.lang.Object[][]" or
* "int[]".
*/
public static String externalType(String internalType)
{
// Strip the array part, if any.
int dimensionCount = internalArrayTypeDimensionCount(internalType);
if (dimensionCount > 0)
{
internalType = internalType.substring(dimensionCount);
}
// Analyze the actual type part.
char internalTypeChar = internalType.charAt(0);
String externalType =
internalTypeChar == ClassConstants.TYPE_VOID ? JavaConstants.TYPE_VOID :
internalTypeChar == ClassConstants.TYPE_BOOLEAN ? JavaConstants.TYPE_BOOLEAN :
internalTypeChar == ClassConstants.TYPE_BYTE ? JavaConstants.TYPE_BYTE :
internalTypeChar == ClassConstants.TYPE_CHAR ? JavaConstants.TYPE_CHAR :
internalTypeChar == ClassConstants.TYPE_SHORT ? JavaConstants.TYPE_SHORT :
internalTypeChar == ClassConstants.TYPE_INT ? JavaConstants.TYPE_INT :
internalTypeChar == ClassConstants.TYPE_FLOAT ? JavaConstants.TYPE_FLOAT :
internalTypeChar == ClassConstants.TYPE_LONG ? JavaConstants.TYPE_LONG :
internalTypeChar == ClassConstants.TYPE_DOUBLE ? JavaConstants.TYPE_DOUBLE :
internalTypeChar == '%' ? "%" :
internalTypeChar == ClassConstants.TYPE_CLASS_START ? externalClassName(internalType.substring(1, internalType.indexOf(ClassConstants.TYPE_CLASS_END))) :
null;
if (externalType == null)
{
throw new IllegalArgumentException("Unknown type ["+internalType+"]");
}
// Append the array part, if any.
for (int count = 0; count < dimensionCount; count++)
{
externalType += JavaConstants.TYPE_ARRAY;
}
return externalType;
}
/**
* Converts an internal type into an external type, as expected by
* Class.forName.
* @param internalType the internal type,
* e.g. "Ljava/lang/Object;" or
* "[[Ljava/lang/Object;" or
* "[I".
* @return the external type,
* e.g. "java.lang.Object" or
* "[[Ljava.lang.Object;" or
* "[I".
*/
public static String externalClassForNameType(String internalType)
{
return isInternalArrayType(internalType) ?
externalClassName(internalType) :
externalClassName(internalClassNameFromClassType(internalType));
}
/**
* Returns whether the given internal descriptor String represents a method
* descriptor.
* @param internalDescriptor the internal descriptor String,
* e.g. "(II)Z".
* @return true if the given String is a method descriptor,
* false otherwise.
*/
public static boolean isInternalMethodDescriptor(String internalDescriptor)
{
return internalDescriptor.charAt(0) == ClassConstants.METHOD_ARGUMENTS_OPEN;
}
/**
* Returns whether the given member String represents an external method
* name with arguments.
* @param externalMemberNameAndArguments the external member String,
* e.g. "myField" or
* e.g. "myMethod(int,int)".
* @return true if the given String refers to a method,
* false otherwise.
*/
public static boolean isExternalMethodNameAndArguments(String externalMemberNameAndArguments)
{
return externalMemberNameAndArguments.indexOf(JavaConstants.METHOD_ARGUMENTS_OPEN) > 0;
}
/**
* Returns the name part of the given external method name and arguments.
* @param externalMethodNameAndArguments the external method name and arguments,
* e.g. "myMethod(int,int)".
* @return the name part of the String, e.g. "myMethod".
*/
public static String externalMethodName(String externalMethodNameAndArguments)
{
ExternalTypeEnumeration externalTypeEnumeration =
new ExternalTypeEnumeration(externalMethodNameAndArguments);
return externalTypeEnumeration.methodName();
}
/**
* Converts the given external method return type and name and arguments to
* an internal method descriptor.
* @param externalReturnType the external method return type,
* e.g. "boolean".
* @param externalMethodNameAndArguments the external method name and arguments,
* e.g. "myMethod(int,int)".
* @return the internal method descriptor,
* e.g. "(II)Z".
*/
public static String internalMethodDescriptor(String externalReturnType,
String externalMethodNameAndArguments)
{
StringBuffer internalMethodDescriptor = new StringBuffer();
internalMethodDescriptor.append(ClassConstants.METHOD_ARGUMENTS_OPEN);
ExternalTypeEnumeration externalTypeEnumeration =
new ExternalTypeEnumeration(externalMethodNameAndArguments);
while (externalTypeEnumeration.hasMoreTypes())
{
internalMethodDescriptor.append(internalType(externalTypeEnumeration.nextType()));
}
internalMethodDescriptor.append(ClassConstants.METHOD_ARGUMENTS_CLOSE);
internalMethodDescriptor.append(internalType(externalReturnType));
return internalMethodDescriptor.toString();
}
/**
* Converts the given external method return type and List of arguments to
* an internal method descriptor.
* @param externalReturnType the external method return type,
* e.g. "boolean".
* @param externalArguments the external method arguments,
* e.g. { "int", "int" }.
* @return the internal method descriptor,
* e.g. "(II)Z".
*/
public static String internalMethodDescriptor(String externalReturnType,
List externalArguments)
{
StringBuffer internalMethodDescriptor = new StringBuffer();
internalMethodDescriptor.append(ClassConstants.METHOD_ARGUMENTS_OPEN);
for (int index = 0; index < externalArguments.size(); index++)
{
internalMethodDescriptor.append(internalType((String)externalArguments.get(index)));
}
internalMethodDescriptor.append(ClassConstants.METHOD_ARGUMENTS_CLOSE);
internalMethodDescriptor.append(internalType(externalReturnType));
return internalMethodDescriptor.toString();
}
/**
* Converts the given internal method return type and List of arguments to
* an internal method descriptor.
*
* @param internalReturnType the external method return type,
* e.g. "Z".
* @param internalArguments the external method arguments,
* e.g. { "I", "I" }.
* @return the internal method descriptor, e.g. "(II)Z".
*/
public static String internalMethodDescriptorFromInternalTypes(String internalReturnType,
List internalArguments)
{
StringBuilder internalMethodDescriptor = new StringBuilder();
internalMethodDescriptor.append(ClassConstants.METHOD_ARGUMENTS_OPEN);
for (String argument : internalArguments)
{
internalMethodDescriptor.append(argument);
}
internalMethodDescriptor.append(ClassConstants.METHOD_ARGUMENTS_CLOSE);
internalMethodDescriptor.append(internalReturnType);
return internalMethodDescriptor.toString();
}
/**
* Converts an internal field description into an external full field description.
* @param accessFlags the access flags of the field.
* @param fieldName the field name,
* e.g. "myField".
* @param internalFieldDescriptor the internal field descriptor,
* e.g. "Z".
* @return the external full field description,
* e.g. "public boolean myField".
*/
public static String externalFullFieldDescription(int accessFlags,
String fieldName,
String internalFieldDescriptor)
{
return externalFieldAccessFlags(accessFlags) +
externalType(internalFieldDescriptor) +
' ' +
fieldName;
}
/**
* Converts an internal method description into an external full method description.
* @param internalClassName the internal name of the class of the method,
* e.g. "mypackage/MyClass".
* @param accessFlags the access flags of the method.
* @param internalMethodName the internal method name,
* e.g. "myMethod" or
* "<init>".
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(II)Z".
* @return the external full method description,
* e.g. "public boolean myMethod(int,int)" or
* "public MyClass(int,int)".
*/
public static String externalFullMethodDescription(String internalClassName,
int accessFlags,
String internalMethodName,
String internalMethodDescriptor)
{
return externalMethodAccessFlags(accessFlags) +
externalMethodReturnTypeAndName(internalClassName,
internalMethodName,
internalMethodDescriptor) +
JavaConstants.METHOD_ARGUMENTS_OPEN +
externalMethodArguments(internalMethodDescriptor) +
JavaConstants.METHOD_ARGUMENTS_CLOSE;
}
/**
* Converts internal class access flags into an external access description.
* @param accessFlags the class access flags.
* @return the external class access description,
* e.g. "public final ".
*/
public static String externalClassAccessFlags(int accessFlags)
{
return externalClassAccessFlags(accessFlags, "");
}
/**
* Converts internal class access flags into an external access description.
* @param accessFlags the class access flags.
* @param prefix a prefix that is added to each access modifier.
* @return the external class access description,
* e.g. "public final ".
*/
public static String externalClassAccessFlags(int accessFlags, String prefix)
{
if (accessFlags == 0)
{
return EMPTY_STRING;
}
StringBuffer string = new StringBuffer(50);
if ((accessFlags & ClassConstants.ACC_PUBLIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_PUBLIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_PRIVATE) != 0)
{
// Only in InnerClasses attributes.
string.append(prefix).append(JavaConstants.ACC_PRIVATE).append(' ');
}
if ((accessFlags & ClassConstants.ACC_PROTECTED) != 0)
{
// Only in InnerClasses attributes.
string.append(prefix).append(JavaConstants.ACC_PROTECTED).append(' ');
}
if ((accessFlags & ClassConstants.ACC_STATIC) != 0)
{
// Only in InnerClasses attributes.
string.append(prefix).append(JavaConstants.ACC_STATIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_FINAL) != 0)
{
string.append(prefix).append(JavaConstants.ACC_FINAL).append(' ');
}
if ((accessFlags & ClassConstants.ACC_ANNOTATION) != 0)
{
string.append(prefix).append(JavaConstants.ACC_ANNOTATION);
}
if ((accessFlags & ClassConstants.ACC_INTERFACE) != 0)
{
string.append(prefix).append(JavaConstants.ACC_INTERFACE).append(' ');
}
else if ((accessFlags & ClassConstants.ACC_ENUM) != 0)
{
string.append(prefix).append(JavaConstants.ACC_ENUM).append(' ');
}
else if ((accessFlags & ClassConstants.ACC_ABSTRACT) != 0)
{
string.append(prefix).append(JavaConstants.ACC_ABSTRACT).append(' ');
}
else if ((accessFlags & ClassConstants.ACC_SYNTHETIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_SYNTHETIC).append(' ');
}
else if ((accessFlags & ClassConstants.ACC_MODULE) != 0)
{
string.append(prefix).append(JavaConstants.ACC_MODULE).append(' ');
}
return string.toString();
}
/**
* Converts internal field access flags into an external access description.
* @param accessFlags the field access flags.
* @return the external field access description,
* e.g. "public volatile ".
*/
public static String externalFieldAccessFlags(int accessFlags)
{
return externalFieldAccessFlags(accessFlags, "");
}
/**
* Converts internal field access flags into an external access description.
* @param accessFlags the field access flags.
* @param prefix a prefix that is added to each access modifier.
* @return the external field access description,
* e.g. "public volatile ".
*/
public static String externalFieldAccessFlags(int accessFlags, String prefix)
{
if (accessFlags == 0)
{
return EMPTY_STRING;
}
StringBuffer string = new StringBuffer(50);
if ((accessFlags & ClassConstants.ACC_PUBLIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_PUBLIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_PRIVATE) != 0)
{
string.append(prefix).append(JavaConstants.ACC_PRIVATE).append(' ');
}
if ((accessFlags & ClassConstants.ACC_PROTECTED) != 0)
{
string.append(prefix).append(JavaConstants.ACC_PROTECTED).append(' ');
}
if ((accessFlags & ClassConstants.ACC_STATIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_STATIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_FINAL) != 0)
{
string.append(prefix).append(JavaConstants.ACC_FINAL).append(' ');
}
if ((accessFlags & ClassConstants.ACC_VOLATILE) != 0)
{
string.append(prefix).append(JavaConstants.ACC_VOLATILE).append(' ');
}
if ((accessFlags & ClassConstants.ACC_TRANSIENT) != 0)
{
string.append(prefix).append(JavaConstants.ACC_TRANSIENT).append(' ');
}
if ((accessFlags & ClassConstants.ACC_SYNTHETIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_SYNTHETIC).append(' ');
}
return string.toString();
}
/**
* Converts internal method access flags into an external access description.
* @param accessFlags the method access flags.
* @return the external method access description,
* e.g. "public synchronized ".
*/
public static String externalMethodAccessFlags(int accessFlags)
{
return externalMethodAccessFlags(accessFlags, "");
}
/**
* Converts internal method access flags into an external access description.
* @param accessFlags the method access flags.
* @param prefix a prefix that is added to each access modifier.
* @return the external method access description,
* e.g. "public synchronized ".
*/
public static String externalMethodAccessFlags(int accessFlags, String prefix)
{
if (accessFlags == 0)
{
return EMPTY_STRING;
}
StringBuffer string = new StringBuffer(50);
if ((accessFlags & ClassConstants.ACC_PUBLIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_PUBLIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_PRIVATE) != 0)
{
string.append(prefix).append(JavaConstants.ACC_PRIVATE).append(' ');
}
if ((accessFlags & ClassConstants.ACC_PROTECTED) != 0)
{
string.append(prefix).append(JavaConstants.ACC_PROTECTED).append(' ');
}
if ((accessFlags & ClassConstants.ACC_STATIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_STATIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_FINAL) != 0)
{
string.append(prefix).append(JavaConstants.ACC_FINAL).append(' ');
}
if ((accessFlags & ClassConstants.ACC_SYNCHRONIZED) != 0)
{
string.append(prefix).append(JavaConstants.ACC_SYNCHRONIZED).append(' ');
}
if ((accessFlags & ClassConstants.ACC_BRIDGE) != 0)
{
string.append(prefix).append(JavaConstants.ACC_BRIDGE).append(' ');
}
if ((accessFlags & ClassConstants.ACC_VARARGS) != 0)
{
string.append(prefix).append(JavaConstants.ACC_VARARGS).append(' ');
}
if ((accessFlags & ClassConstants.ACC_NATIVE) != 0)
{
string.append(prefix).append(JavaConstants.ACC_NATIVE).append(' ');
}
if ((accessFlags & ClassConstants.ACC_ABSTRACT) != 0)
{
string.append(prefix).append(JavaConstants.ACC_ABSTRACT).append(' ');
}
if ((accessFlags & ClassConstants.ACC_STRICT) != 0)
{
string.append(prefix).append(JavaConstants.ACC_STRICT).append(' ');
}
if ((accessFlags & ClassConstants.ACC_SYNTHETIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_SYNTHETIC).append(' ');
}
return string.toString();
}
/**
* Converts internal method parameter access flags into an external access
* description.
* @param accessFlags the method parameter access flags.
* @return the external method parameter access description,
* e.g. "final mandated ".
*/
public static String externalParameterAccessFlags(int accessFlags)
{
return externalParameterAccessFlags(accessFlags, "");
}
/**
* Converts internal method parameter access flags into an external access
* description.
* @param accessFlags the method parameter access flags.
* @param prefix a prefix that is added to each access modifier.
* @return the external method parameter access description,
* e.g. "final mandated ".
*/
public static String externalParameterAccessFlags(int accessFlags, String prefix)
{
if (accessFlags == 0)
{
return EMPTY_STRING;
}
StringBuffer string = new StringBuffer(50);
if ((accessFlags & ClassConstants.ACC_FINAL) != 0)
{
string.append(prefix).append(JavaConstants.ACC_FINAL).append(' ');
}
if ((accessFlags & ClassConstants.ACC_SYNTHETIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_SYNTHETIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_MANDATED) != 0)
{
string.append(prefix).append(JavaConstants.ACC_MANDATED).append(' ');
}
return string.toString();
}
/**
* Converts an internal method descriptor into an external method return type.
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(II)Z".
* @return the external method return type,
* e.g. "boolean".
*/
public static String externalMethodReturnType(String internalMethodDescriptor)
{
return externalType(internalMethodReturnType(internalMethodDescriptor));
}
/**
* Converts internal module access flags into an external access
* description.
* @param accessFlags the module access flags.
* @return the external module access description,
* e.g. "open mandated ".
*/
public static String externalModuleAccessFlags(int accessFlags)
{
return externalModuleAccessFlags(accessFlags, "");
}
/**
* Converts internal module access flags into an external access
* description.
* @param accessFlags the module access flags.
* @param prefix a prefix that is added to each access modifier.
* @return the external module access description,
* e.g. "final mandated ".
*/
public static String externalModuleAccessFlags(int accessFlags, String prefix)
{
if (accessFlags == 0)
{
return EMPTY_STRING;
}
StringBuffer string = new StringBuffer(50);
if ((accessFlags & ClassConstants.ACC_OPEN) != 0)
{
string.append(prefix).append(JavaConstants.ACC_OPEN).append(' ');
}
if ((accessFlags & ClassConstants.ACC_SYNTHETIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_SYNTHETIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_MANDATED) != 0)
{
string.append(prefix).append(JavaConstants.ACC_MANDATED).append(' ');
}
return string.toString();
}
/**
* Converts internal module requires access flags into an external access
* description.
* @param accessFlags the module requires access flags.
* @return the external module requires access description,
* e.g. "static mandated ".
*/
public static String externalRequiresAccessFlags(int accessFlags)
{
return externalRequiresAccessFlags(accessFlags, "");
}
/**
* Converts internal module requires access flags into an external access
* description.
* @param accessFlags the module requires access flags.
* @param prefix a prefix that is added to each access modifier.
* @return the external module requires access description,
* e.g. "static mandated ".
*/
public static String externalRequiresAccessFlags(int accessFlags, String prefix)
{
if (accessFlags == 0)
{
return EMPTY_STRING;
}
StringBuffer string = new StringBuffer(50);
if ((accessFlags & ClassConstants.ACC_TRANSITIVE) != 0)
{
string.append(prefix).append(JavaConstants.ACC_TRANSITIVE).append(' ');
}
if ((accessFlags & ClassConstants.ACC_STATIC_PHASE) != 0)
{
string.append(prefix).append(JavaConstants.ACC_STATIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_SYNTHETIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_SYNTHETIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_MANDATED) != 0)
{
string.append(prefix).append(JavaConstants.ACC_MANDATED).append(' ');
}
return string.toString();
}
/**
* Converts internal module exports access flags into an external access
* description.
* @param accessFlags the module exports access flags.
* @return the external module exports access description,
* e.g. "synthetic mandated ".
*/
public static String externalExportsAccessFlags(int accessFlags)
{
return externalExportsAccessFlags(accessFlags, "");
}
/**
* Converts internal module exports access flags into an external access
* description.
* @param accessFlags the module exports access flags.
* @param prefix a prefix that is added to each access modifier.
* @return the external module exports access description,
* e.g. "static mandated ".
*/
public static String externalExportsAccessFlags(int accessFlags, String prefix)
{
if (accessFlags == 0)
{
return EMPTY_STRING;
}
StringBuffer string = new StringBuffer(50);
if ((accessFlags & ClassConstants.ACC_SYNTHETIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_SYNTHETIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_MANDATED) != 0)
{
string.append(prefix).append(JavaConstants.ACC_MANDATED).append(' ');
}
return string.toString();
}
/**
* Converts internal module opens access flags into an external access
* description.
* @param accessFlags the module opens access flags.
* @return the external module opens access description,
* e.g. "synthetic mandated ".
*/
public static String externalOpensAccessFlags(int accessFlags)
{
return externalOpensAccessFlags(accessFlags, "");
}
/**
* Converts internal module opens access flags into an external access
* description.
* @param accessFlags the module opens access flags.
* @param prefix a prefix that is added to each access modifier.
* @return the external module opens access description,
* e.g. "static mandated ".
*/
public static String externalOpensAccessFlags(int accessFlags, String prefix)
{
if (accessFlags == 0)
{
return EMPTY_STRING;
}
StringBuffer string = new StringBuffer(50);
if ((accessFlags & ClassConstants.ACC_SYNTHETIC) != 0)
{
string.append(prefix).append(JavaConstants.ACC_SYNTHETIC).append(' ');
}
if ((accessFlags & ClassConstants.ACC_MANDATED) != 0)
{
string.append(prefix).append(JavaConstants.ACC_MANDATED).append(' ');
}
return string.toString();
}
/**
* Converts an internal class name, method name, and method descriptor to
* an external method return type and name.
* @param internalClassName the internal name of the class of the method,
* e.g. "mypackage/MyClass".
* @param internalMethodName the internal method name,
* e.g. "myMethod" or
* "<init>".
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(II)Z".
* @return the external method return type and name,
* e.g. "boolean myMethod" or
* "MyClass".
*/
private static String externalMethodReturnTypeAndName(String internalClassName,
String internalMethodName,
String internalMethodDescriptor)
{
return internalMethodName.equals(ClassConstants.METHOD_NAME_INIT) ?
externalShortClassName(externalClassName(internalClassName)) :
(externalMethodReturnType(internalMethodDescriptor) +
' ' +
internalMethodName);
}
/**
* Converts an internal method descriptor into an external method argument
* description.
* @param internalMethodDescriptor the internal method descriptor,
* e.g. "(II)Z".
* @return the external method argument description,
* e.g. "int,int".
*/
public static String externalMethodArguments(String internalMethodDescriptor)
{
StringBuffer externalMethodNameAndArguments = new StringBuffer();
InternalTypeEnumeration internalTypeEnumeration =
new InternalTypeEnumeration(internalMethodDescriptor);
while (internalTypeEnumeration.hasMoreTypes())
{
externalMethodNameAndArguments.append(externalType(internalTypeEnumeration.nextType()));
if (internalTypeEnumeration.hasMoreTypes())
{
externalMethodNameAndArguments.append(JavaConstants.METHOD_ARGUMENTS_SEPARATOR);
}
}
return externalMethodNameAndArguments.toString();
}
/**
* Returns the internal package name of the given internal class name.
* @param internalClassName the internal class name,
* e.g. "java/lang/Object".
* @return the internal package name,
* e.g. "java/lang".
*/
public static String internalPackageName(String internalClassName)
{
String internalPackagePrefix = internalPackagePrefix(internalClassName);
int length = internalPackagePrefix.length();
return length > 0 ?
internalPackagePrefix.substring(0, length - 1) :
"";
}
/**
* Returns the internal package prefix of the given internal class name.
* @param internalClassName the internal class name,
* e.g. "java/lang/Object".
* @return the internal package prefix,
* e.g. "java/lang/".
*/
public static String internalPackagePrefix(String internalClassName)
{
return internalClassName.substring(0, internalClassName.lastIndexOf(ClassConstants.PACKAGE_SEPARATOR,
internalClassName.length() - 2) + 1);
}
/**
* Returns the external package name of the given external class name.
* @param externalClassName the external class name,
* e.g. "java.lang.Object".
* @return the external package name,
* e.g. "java.lang".
*/
public static String externalPackageName(String externalClassName)
{
String externalPackagePrefix = externalPackagePrefix(externalClassName);
int length = externalPackagePrefix.length();
return length > 0 ?
externalPackagePrefix.substring(0, length - 1) :
"";
}
/**
* Returns the external package prefix of the given external class name.
* @param externalClassName the external class name,
* e.g. "java.lang.Object".
* @return the external package prefix,
* e.g. "java.lang.".
*/
public static String externalPackagePrefix(String externalClassName)
{
return externalClassName.substring(0, externalClassName.lastIndexOf(JavaConstants.PACKAGE_SEPARATOR,
externalClassName.length() - 2) + 1);
}
}
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