FindBugs™ 1.3.9

edu.umd.cs.findbugs.ba.bcp
Class IfNull

java.lang.Object
  extended by edu.umd.cs.findbugs.ba.bcp.PatternElement
      extended by edu.umd.cs.findbugs.ba.bcp.SingleInstruction
          extended by edu.umd.cs.findbugs.ba.bcp.OneVariableInstruction
              extended by edu.umd.cs.findbugs.ba.bcp.IfNull
All Implemented Interfaces:
EdgeTypes

public class IfNull
extends OneVariableInstruction
implements EdgeTypes


Field Summary
 
Fields inherited from interface edu.umd.cs.findbugs.ba.EdgeTypes
BACKEDGE_SOURCE_EDGE, BACKEDGE_TARGET_EDGE, CHECKED_EXCEPTIONS_FLAG, EXIT_EDGE, EXPLICIT_EXCEPTIONS_FLAG, FALL_THROUGH_EDGE, GOTO_EDGE, HANDLED_EXCEPTION_EDGE, IFCMP_EDGE, JSR_EDGE, RET_EDGE, RETURN_EDGE, START_EDGE, SWITCH_DEFAULT_EDGE, SWITCH_EDGE, UNHANDLED_EXCEPTION_EDGE, UNKNOWN_EDGE
 
Constructor Summary
IfNull(java.lang.String varName)
           
 
Method Summary
 boolean acceptBranch(Edge edge, org.apache.bcel.generic.InstructionHandle source)
          Return whether or not it is acceptable to take the given branch.
 MatchResult match(org.apache.bcel.generic.InstructionHandle handle, org.apache.bcel.generic.ConstantPoolGen cpg, ValueNumberFrame before, ValueNumberFrame after, BindingSet bindingSet)
          Return whether or not this element matches the given instruction with the given Bindings in effect.
 
Methods inherited from class edu.umd.cs.findbugs.ba.bcp.OneVariableInstruction
addOrCheckDefinition
 
Methods inherited from class edu.umd.cs.findbugs.ba.bcp.SingleInstruction
maxOccur, minOccur
 
Methods inherited from class edu.umd.cs.findbugs.ba.bcp.PatternElement
addOrCheckDefinition, allowTrailingEdges, dominatedBy, getDominatedBy, getLabel, getNext, label, lookup, setAllowTrailingEdges, setIndex, setNext, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

IfNull

public IfNull(java.lang.String varName)
Method Detail

match

public MatchResult match(org.apache.bcel.generic.InstructionHandle handle,
                         org.apache.bcel.generic.ConstantPoolGen cpg,
                         ValueNumberFrame before,
                         ValueNumberFrame after,
                         BindingSet bindingSet)
                  throws DataflowAnalysisException
Description copied from class: PatternElement
Return whether or not this element matches the given instruction with the given Bindings in effect.

Specified by:
match in class PatternElement
Parameters:
handle - the instruction
cpg - the ConstantPoolGen from the method
before - the ValueNumberFrame representing values in the Java stack frame just before the execution of the instruction
after - the ValueNumberFrame representing values in the Java stack frame just after the execution of the instruction
bindingSet - the set of Bindings
Returns:
if the match is successful, returns a MatchResult with the PatternElement and BindingSet; if the match is not successful, returns null
Throws:
DataflowAnalysisException

acceptBranch

public boolean acceptBranch(Edge edge,
                            org.apache.bcel.generic.InstructionHandle source)
Description copied from class: PatternElement
Return whether or not it is acceptable to take the given branch.

Overrides:
acceptBranch in class SingleInstruction
Parameters:
edge - the Edge representing the branch
source - the source instruction of the branch
Returns:
true if the Edge is acceptable, false if not

FindBugs™ 1.3.9

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