edu.umd.cs.findbugs.ba.bcp

Class ByteCodePattern

java.lang.Object

edu.umd.cs.findbugs.ba.bcp.ByteCodePattern

public class ByteCodePattern
extends Object

A ByteCodePattern is a pattern matching a sequence of bytecode instructions.

Author:

David Hovemeyer

See Also:

PatternElement, PatternMatcher

Constructor Summary

Constructors

Constructor and Description
ByteCodePattern()

Method Summary

Methods

Modifier and Type	Method and Description
ByteCodePattern	add(PatternElement element) Add a PatternElement to the end of the pattern.
ByteCodePattern	addWild(int numWild) Add a wildcard to match between 0 and given number of instructions.
String	dummyVariable() Get a dummy variable name.
PatternElement	getFirst() Get the first PatternElement in the pattern.
ByteCodePattern	setInterElementWild(int numWild) Set number of inter-element wildcards to create between explicit PatternElements.

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteCodePattern

public ByteCodePattern()

Method Detail

add

public ByteCodePattern add(PatternElement element)

Add a PatternElement to the end of the pattern.

Parameters:

element - the PatternElement

Returns:

this object

addWild

public ByteCodePattern addWild(int numWild)

Add a wildcard to match between 0 and given number of instructions. If there is already a wildcard at the end of the current pattern, resets its max value to that given.

Parameters:

numWild - maximum number of instructions to be matched by the wildcard

setInterElementWild

public ByteCodePattern setInterElementWild(int numWild)

Set number of inter-element wildcards to create between explicit PatternElements. By default, no implicit wildcards are created.

Parameters:

numWild - the number of wildcard instructions which may be matched between explicit PatternElements

Returns:

this object

getFirst

public PatternElement getFirst()

Get the first PatternElement in the pattern.

dummyVariable

public String dummyVariable()

Get a dummy variable name. The name returned will begin with the '$' character, and will be different than any previous dummy variable name allocated by this object. Dummy variable names are useful for creating PatternElements where you don't care whether the value it uses is the same as one used by another PatternElement.