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java.lang.Objectorg.gjt.jclasslib.structures.AbstractStructure
Base class for all structures defined in the class file format.
Provides common services such as reading, writing and debugging.
Field Summary | |
protected ClassFile |
classFile
Parent class file for this structure. |
protected boolean |
debug
Flag for debugging while reading and writing class files. |
static String |
SYSTEM_PROPERTY_DEBUG
Set this JVM System property to true to switch on debugging for reading and writing class files. |
Constructor Summary | |
protected |
AbstractStructure()
Constructor. |
Method Summary | |
protected void |
debug(String message)
Utility method for derived structures. |
ClassFile |
getClassFile()
Get parent class file. |
boolean |
getDebug()
Get the debug mode for this structure. |
protected int |
getLength(Object array)
Utility method for derived structures. |
protected String |
printAccessFlags(int accessFlags)
Utility method for derived structures. |
protected String |
printAccessFlagsVerbose(int accessFlags)
Utility method for derived structures. |
protected String |
printBytes(int bytes)
Utility method for derived structures. |
void |
read(DataInput in)
Read this structure from the given DataInput. |
void |
setClassFile(ClassFile classFile)
Set parent class file. |
void |
setDebug(boolean debug)
Set the debug mode for this structure. |
void |
write(DataOutput out)
Write this structure to the given DataOutput. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
public static final String SYSTEM_PROPERTY_DEBUG
protected ClassFile classFile
protected boolean debug
Constructor Detail |
protected AbstractStructure()
Method Detail |
public ClassFile getClassFile()
public void setClassFile(ClassFile classFile)
Has to be called at least once on a structure.
classFile
- the new parent class filepublic void read(DataInput in) throws InvalidByteCodeException, IOException
Excpects DataInput to be in JVM class file format and just before a structure of this kind. No look ahead parsing since the class file format is deterministic.
in
- the DataInput from which to read
InvalidByteCodeException
- if the byte code is invalid
IOException
- if an exception occurs with the DataInputpublic void write(DataOutput out) throws InvalidByteCodeException, IOException
The written bytes are in JVM class file format.
out
- the DataOutput to which to write
InvalidByteCodeException
- if the structure is internally inconsistent
IOException
- if an exception occurs with the DataOutputpublic boolean getDebug()
public void setDebug(boolean debug)
debug
- the new debug modeprotected int getLength(Object array)
array
- the array for which the length is requested
protected void debug(String message)
message
- the debug messageprotected String printBytes(int bytes)
bytes
- the int value to print as a hex string
protected String printAccessFlags(int accessFlags)
accessFlags
- the unsigned short value to print as a hex string
protected String printAccessFlagsVerbose(int accessFlags)
accessFlags
- the unsigned short value to print as a hex string
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