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bcel API: Class Utility
org.apache.bcel.classfile
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Constructor Summary | |
Utility()
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Method Summary | |
static java.lang.String |
accessToString(int access_flags)
Convert bit field of flags into string such as `static final'. |
static java.lang.String |
accessToString(int access_flags,
boolean for_class)
Convert bit field of flags into string such as `static final'. |
static java.lang.String |
classOrInterface(int access_flags)
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static int |
clearBit(int flag,
int i)
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static java.lang.String |
codeToString(byte[] code,
ConstantPool constant_pool,
int index,
int length)
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static java.lang.String |
codeToString(byte[] code,
ConstantPool constant_pool,
int index,
int length,
boolean verbose)
Disassemble a byte array of JVM byte codes starting from code line `index' and return the disassembled string representation. |
static java.lang.String |
codeToString(ByteSequence bytes,
ConstantPool constant_pool)
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static java.lang.String |
codeToString(ByteSequence bytes,
ConstantPool constant_pool,
boolean verbose)
Disassemble a stream of byte codes and return the string representation. |
static java.lang.String |
compactClassName(java.lang.String str)
Shorten long class names, java/lang/String becomes String. |
static java.lang.String |
compactClassName(java.lang.String str,
boolean chopit)
Shorten long class names, java/lang/String becomes java.lang.String, e.g.. |
static java.lang.String |
compactClassName(java.lang.String str,
java.lang.String prefix,
boolean chopit)
Shorten long class name str, i.e., chop off the prefix, if the class name starts with this string and the flag chopit is true. |
static byte[] |
decode(java.lang.String s,
boolean uncompress)
Decode a string back to a byte array. |
static java.lang.String |
encode(byte[] bytes,
boolean compress)
Encode byte array it into Java identifier string, i.e., a string that only contains the following characters: (a, ... |
static java.lang.String |
fillup(java.lang.String str,
int length,
boolean left_justify,
char fill)
Fillup char with up to length characters with char `fill' and justify it left or right. |
static java.lang.String |
format(int i,
int length,
boolean left_justify,
char fill)
Return a string for an integer justified left or right and filled up with `fill' characters if necessary. |
static java.lang.String |
getSignature(java.lang.String type)
Parse Java type such as "char", or "java.lang.String[]" and return the signature in byte code format, e.g. |
static boolean |
isJavaIdentifierPart(char ch)
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static boolean |
isSet(int flag,
int i)
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static java.lang.String[] |
methodSignatureArgumentTypes(java.lang.String signature)
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static java.lang.String[] |
methodSignatureArgumentTypes(java.lang.String signature,
boolean chopit)
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static java.lang.String |
methodSignatureReturnType(java.lang.String signature)
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static java.lang.String |
methodSignatureReturnType(java.lang.String signature,
boolean chopit)
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static java.lang.String |
methodSignatureToString(java.lang.String signature,
java.lang.String name,
java.lang.String access)
Converts method signature to string with all class names compacted. |
static java.lang.String |
methodSignatureToString(java.lang.String signature,
java.lang.String name,
java.lang.String access,
boolean chopit)
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static java.lang.String |
methodSignatureToString(java.lang.String signature,
java.lang.String name,
java.lang.String access,
boolean chopit,
LocalVariableTable vars)
A returntype signature represents the return value from a method. |
static java.lang.String |
methodTypeToSignature(java.lang.String ret,
java.lang.String[] argv)
Converts string containing the method return and argument types to a byte code method signature. |
static java.lang.String |
printArray(java.lang.Object[] obj)
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static java.lang.String |
printArray(java.lang.Object[] obj,
boolean braces)
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static void |
printArray(java.io.PrintStream out,
java.lang.Object[] obj)
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static void |
printArray(java.io.PrintWriter out,
java.lang.Object[] obj)
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static java.lang.String |
replace(java.lang.String str,
java.lang.String old,
java.lang.String new_)
Replace all occurences of old in str with new. |
static short |
searchOpcode(java.lang.String name)
Map opcode names to opcode numbers. |
static int |
setBit(int flag,
int i)
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static java.lang.String |
signatureToString(java.lang.String signature)
Converts signature to string with all class names compacted. |
static java.lang.String |
signatureToString(java.lang.String signature,
boolean chopit)
The field signature represents the value of an argument to a function or the value of a variable. |
static java.lang.String |
toHexString(byte[] bytes)
Convert bytes into hexidecimal string |
static byte |
typeOfMethodSignature(java.lang.String signature)
Return type of method signature as a byte value as defined in Constants |
static byte |
typeOfSignature(java.lang.String signature)
Return type of signature as a byte value as defined in Constants |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public Utility()
Method Detail |
public static final java.lang.String accessToString(int access_flags)
access_flags
- Access flagspublic static final java.lang.String accessToString(int access_flags, boolean for_class)
access_flags
- Access flagsfor_class
- access flags are for class qualifiers ?public static final java.lang.String classOrInterface(int access_flags)
public static final java.lang.String codeToString(byte[] code, ConstantPool constant_pool, int index, int length, boolean verbose)
code
- byte code arrayconstant_pool
- Array of constantsindex
- offset in `code' array
(number of opcodes, not bytes!)length
- number of opcodes to decompile, -1 for allverbose
- be verbose, e.g. print constant pool indexpublic static final java.lang.String codeToString(byte[] code, ConstantPool constant_pool, int index, int length)
public static final java.lang.String codeToString(ByteSequence bytes, ConstantPool constant_pool, boolean verbose) throws java.io.IOException
bytes
- stream of bytesconstant_pool
- Array of constantsverbose
- be verbose, e.g. print constant pool indexpublic static final java.lang.String codeToString(ByteSequence bytes, ConstantPool constant_pool) throws java.io.IOException
public static final java.lang.String compactClassName(java.lang.String str)
str
- The long class namepublic static final java.lang.String compactClassName(java.lang.String str, java.lang.String prefix, boolean chopit)
str
- The long class nameprefix
- The prefix the get rid offchopit
- Flag that determines whether chopping is executed or notpublic static final java.lang.String compactClassName(java.lang.String str, boolean chopit)
str
- The long class namechopit
- Flag that determines whether chopping is executed or notpublic static final int setBit(int flag, int i)
public static final int clearBit(int flag, int i)
public static final boolean isSet(int flag, int i)
public static final java.lang.String methodTypeToSignature(java.lang.String ret, java.lang.String[] argv) throws java.lang.ClassFormatError
ret
- Return type of methodargv
- Types of method argumentspublic static final java.lang.String[] methodSignatureArgumentTypes(java.lang.String signature) throws java.lang.ClassFormatError
signature
- Method signaturepublic static final java.lang.String[] methodSignatureArgumentTypes(java.lang.String signature, boolean chopit) throws java.lang.ClassFormatError
signature
- Method signaturechopit
- Shorten class names ?public static final java.lang.String methodSignatureReturnType(java.lang.String signature) throws java.lang.ClassFormatError
signature
- Method signaturepublic static final java.lang.String methodSignatureReturnType(java.lang.String signature, boolean chopit) throws java.lang.ClassFormatError
signature
- Method signaturechopit
- Shorten class names ?public static final java.lang.String methodSignatureToString(java.lang.String signature, java.lang.String name, java.lang.String access)
signature
- to convertname
- of methodaccess
- flags of methodpublic static final java.lang.String methodSignatureToString(java.lang.String signature, java.lang.String name, java.lang.String access, boolean chopit)
public static final java.lang.String methodSignatureToString(java.lang.String signature, java.lang.String name, java.lang.String access, boolean chopit, LocalVariableTable vars) throws java.lang.ClassFormatError
signature
- Method signaturename
- Method nameaccess
- Method access rightspublic static final java.lang.String replace(java.lang.String str, java.lang.String old, java.lang.String new_)
str
- String to permuteold
- String to be replacednew
- Replacement stringpublic static final java.lang.String signatureToString(java.lang.String signature)
signature
- to convertpublic static final java.lang.String signatureToString(java.lang.String signature, boolean chopit)
This method converts this string into a Java type declaration such as `String[]' and throws a `ClassFormatError' when the parsed type is invalid.::= ::= | | ::= B|C|D|F|I|J|S|Z ::= L ; ::= [ The meaning of the base types is as follows: B byte signed byte C char character D double double precision IEEE float F float single precision IEEE float I int integer J long long integer L ; ... an object of the given class S short signed short Z boolean true or false [ ... array
signature
- Class signaturechopit
- Flag that determines whether chopping is executed or notjava.lang.ClassFormatError
- public static java.lang.String getSignature(java.lang.String type)
type
- Java typepublic static final byte typeOfMethodSignature(java.lang.String signature) throws java.lang.ClassFormatError
signature
- in format described aboveConstants
public static final byte typeOfSignature(java.lang.String signature) throws java.lang.ClassFormatError
signature
- in format described aboveConstants
public static short searchOpcode(java.lang.String name)
public static final java.lang.String toHexString(byte[] bytes)
public static final java.lang.String format(int i, int length, boolean left_justify, char fill)
i
- integer to formatlength
- length of desired stringleft_justify
- format left or rightfill
- fill characterpublic static final java.lang.String fillup(java.lang.String str, int length, boolean left_justify, char fill)
str
- string to formatlength
- length of desired stringleft_justify
- format left or rightfill
- fill characterpublic static final void printArray(java.io.PrintStream out, java.lang.Object[] obj)
public static final void printArray(java.io.PrintWriter out, java.lang.Object[] obj)
public static final java.lang.String printArray(java.lang.Object[] obj)
public static final java.lang.String printArray(java.lang.Object[] obj, boolean braces)
public static boolean isJavaIdentifierPart(char ch)
public static java.lang.String encode(byte[] bytes, boolean compress) throws java.io.IOException
This operation inflates the original byte array by roughly 40-50%
bytes
- the byte array to convertcompress
- use gzip to minimize stringpublic static byte[] decode(java.lang.String s, boolean uncompress) throws java.io.IOException
bytes
- the byte array to convertuncompress
- use gzip to uncompress the stream of bytes
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