Class DroppedException

java.lang.Object

edu.umd.cs.findbugs.visitclass.BetterVisitor

edu.umd.cs.findbugs.visitclass.PreorderVisitor

edu.umd.cs.findbugs.detect.DroppedException

All Implemented Interfaces:

Detector, Priorities, org.apache.bcel.classfile.Visitor

public class DroppedException
extends PreorderVisitor
implements Detector

Field Summary

Fields

Modifier and Type	Field	Description
private final BugAccumulator	bugAccumulator
private final BugReporter	bugReporter
private static final int	CATCH
(package private) Set<String>	causes
(package private) Set<String>	checkedCauses
private ClassContext	classContext
private static final int	CLOSE_PAREN
private static final boolean	DEBUG
private static final boolean	LOOK_IN_SOURCE_TO_FIND_COMMENTED_CATCH_BLOCKS
private static final int	MAX_LINES	The number of lines that we'll scan to look at the source for a catch block.
private static final int	NUM_CONTEXT_LINES	Maximum number of lines we look backwards to find the "catch" keyword.
private static final int	OPEN_BRACE
private static final int	OPEN_PAREN
private static final int	START

Fields inherited from interface Priorities

EXP_PRIORITY, HIGH_PRIORITY, IGNORE_PRIORITY, LOW_PRIORITY, NORMAL_PRIORITY

Constructor Summary

Constructors

Constructor	Description
DroppedException(BugReporter bugReporter)

Method Summary

Modifier and Type	Method	Description
private boolean	catchBlockHasComment(SourceLineAnnotation srcLine)	Analyze a class's source code to see if there is a comment (or other text) in a catch block we have marked as dropping an exception.
private int	getNextExecutableLineNumber(org.apache.bcel.classfile.LineNumberTable linenumbers, int PC)
private int	getUnsignedShort(byte[] a, int i)
(package private) boolean	isChecked(String c)
void	report()	This method is called after all classes to be visited.
void	visit(org.apache.bcel.classfile.Code obj)
void	visitClassContext(ClassContext classContext)	Visit the ClassContext for a class which should be analyzed for instances of bug patterns.

Methods inherited from class PreorderVisitor

amVisitingMainMethod, asUnsignedByte, doVisitMethod, getClassDescriptor, getClassName, getCode, getConstantPool, getDottedClassName, getDottedFieldSig, getDottedMethodSig, getDottedSuperclassName, getField, getFieldDescriptor, getFieldIsStatic, getFieldName, getFieldSig, getFullyQualifiedFieldName, getFullyQualifiedMethodName, getMethod, getMethodDescriptor, getMethodName, getMethodSig, getMethodVisitOrder, getNumberArguments, getNumberMethodArguments, getPackageName, getSizeOfSurroundingTryBlock, getSizeOfSurroundingTryBlock, getSourceFile, getStringFromIndex, getSuperclassName, getSurroundingCaughtExceptions, getSurroundingCaughtExceptions, getSurroundingCaughtExceptionTypes, getSurroundingTryBlock, getSurroundingTryBlock, getThisClass, getXClass, getXField, getXMethod, hasInterestingClass, hasInterestingMethod, isVisitMethodsInCallOrder, setupVisitorForClass, setVisitMethodsInCallOrder, shouldVisit, toString, visitAfter, visitAfter, visitAnnotation, visitAnnotationDefault, visitAnnotationEntry, visitBootstrapMethods, visitCode, visitConstantInvokeDynamic, visitConstantMethodHandle, visitConstantMethodType, visitConstantModule, visitConstantPackage, visitConstantPool, visitEnclosingMethod, visitingField, visitingMethod, visitInnerClasses, visitJavaClass, visitLineNumberTable, visitLocalVariableTable, visitMethodParameters, visitParameterAnnotation, visitParameterAnnotationEntry, visitStackMap, visitStackMapEntry

Methods inherited from class BetterVisitor

clone, report, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visitCodeException, visitConstantClass, visitConstantDouble, visitConstantFieldref, visitConstantFloat, visitConstantInteger, visitConstantInterfaceMethodref, visitConstantLong, visitConstantMethodref, visitConstantNameAndType, visitConstantString, visitConstantUtf8, visitConstantValue, visitDeprecated, visitExceptionTable, visitField, visitInnerClass, visitLineNumber, visitLocalVariable, visitLocalVariableTypeTable, visitMethod, visitSignature, visitSourceFile, visitSynthetic, visitUnknown

Methods inherited from class Object

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

Methods inherited from interface org.apache.bcel.classfile.Visitor

visitConstantDynamic, visitMethodParameter, visitModule, visitModuleExports, visitModuleMainClass, visitModuleOpens, visitModulePackages, visitModuleProvides, visitModuleRequires, visitNestHost, visitNestMembers, visitRecord, visitRecordComponent, visitStackMapType

Field Details

DEBUG

private static final boolean DEBUG

LOOK_IN_SOURCE_TO_FIND_COMMENTED_CATCH_BLOCKS

private static final boolean LOOK_IN_SOURCE_TO_FIND_COMMENTED_CATCH_BLOCKS

causes

Set<String> causes

checkedCauses

Set<String> checkedCauses

bugReporter

private final BugReporter bugReporter

bugAccumulator

private final BugAccumulator bugAccumulator

classContext

private ClassContext classContext

START

private static final int START

See Also:

• Constant Field Values

CATCH

private static final int CATCH

See Also:

• Constant Field Values

OPEN_PAREN

private static final int OPEN_PAREN

See Also:

• Constant Field Values

CLOSE_PAREN

private static final int CLOSE_PAREN

See Also:

• Constant Field Values

OPEN_BRACE

private static final int OPEN_BRACE

See Also:

• Constant Field Values

NUM_CONTEXT_LINES

private static final int NUM_CONTEXT_LINES

Maximum number of lines we look backwards to find the "catch" keyword. Looking backwards is necessary when the indentation style puts the open brace on a different line from the catch clause.

See Also:

• Constant Field Values

MAX_LINES

private static final int MAX_LINES

The number of lines that we'll scan to look at the source for a catch block.

See Also:

• Constant Field Values

Constructor Details

DroppedException

public DroppedException(BugReporter bugReporter)

Method Details

visitClassContext

public void visitClassContext(ClassContext classContext)

Description copied from interface: Detector

Visit the ClassContext for a class which should be analyzed for instances of bug patterns.

Specified by:

visitClassContext in interface Detector

Parameters:

classContext - the ClassContext

report

public void report()

Description copied from interface: Detector

This method is called after all classes to be visited. It should be used by any detectors which accumulate information over all visited classes to generate results.

Specified by:

report in interface Detector

isChecked

boolean isChecked(String c)

getUnsignedShort

private int getUnsignedShort(byte[] a,
 int i)

visit

public void visit(org.apache.bcel.classfile.Code obj)

Overrides:

visit in class BetterVisitor

getNextExecutableLineNumber

private int getNextExecutableLineNumber(org.apache.bcel.classfile.LineNumberTable linenumbers,
 int PC)

catchBlockHasComment

private boolean catchBlockHasComment(SourceLineAnnotation srcLine)

Analyze a class's source code to see if there is a comment (or other text) in a catch block we have marked as dropping an exception.

Returns:

true if there is a comment in the catch block, false if not (or if we can't tell)