org.fife.rsta.ac.java.classreader.attributes
Class Code

java.lang.Object
  org.fife.rsta.ac.java.classreader.attributes.AttributeInfo
      org.fife.rsta.ac.java.classreader.attributes.Code

public class Code
extends AttributeInfo

A variable-length attribute used in the attributes table of MethodInfo structures. A Code attribute contains the JVM instructions and auxiliary information for a single method, instance initialization method, or class or interface initialization method. Every JVM implementation must recognize Code attributes. If the method is either native or abstract, its MethodInfo structure must not have a Code attribute. Otherwise, its MethodInfo structure must have exactly one Code attribute.

Version:

1.0

Author:

Robert Futrell

Field Summary

Fields inherited from class org.fife.rsta.ac.java.classreader.attributes.AttributeInfo

attributeNameIndex

Constructor Summary

Code(MethodInfo mi)
Constructor.

Method Summary

int	getCodeLength() Returns the length of the code array, in bytes.
int	getMaxLocals() Returns the number of local variables in the local variable array allocated upon invocation of this method, including the local variables used to pass parameters to the method on invocation.
int	getMaxStack() Returns the maximum depth of the operand stack of this method at any point during its execution.
MethodInfo	getMethodInfo() Returns the method containing this code.
String	getParameterName(int index) If debugging was enabled during compilation, this method returns the name of the given parameter to this method.
static Code	read(MethodInfo mi, DataInputStream in) Reads a Code attribute from an input stream.

Methods inherited from class org.fife.rsta.ac.java.classreader.attributes.AttributeInfo

getClassFile, getName, readUnsupportedAttribute, skipBytes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Code

public Code(MethodInfo mi)

Constructor.

Parameters:

mi - Information on the parent method.

Method Detail

getCodeLength

public int getCodeLength()

Returns the length of the code array, in bytes.

Returns:

The length of the code array.

getMaxLocals

public int getMaxLocals()

Returns the number of local variables in the local variable array allocated upon invocation of this method, including the local variables used to pass parameters to the method on invocation.

The greatest local variable index for a value of type long or double is maxLocals-2. The greatest local variable index for a value of any other type is maxLocals-1.

Returns:

the maximum size of the local variable array.

getMaxStack

public int getMaxStack()

Returns the maximum depth of the operand stack of this method at any point during its execution.

getMethodInfo

public MethodInfo getMethodInfo()

Returns the method containing this code.

Returns:

The method containing this code.

getParameterName

public String getParameterName(int index)

If debugging was enabled during compilation, this method returns the name of the given parameter to this method. Otherwise, null is returned.

Parameters:

index - The index of the parameter.

Returns:

The name of the parameter, or null.

read

public static Code read(MethodInfo mi,
                        DataInputStream in)
                 throws IOException

Reads a Code attribute from an input stream.

Parameters:

mi - The parent method.

in - The input stream.

Returns:

The Code attribute.

Throws:

IOException - If an IO error occurs.