org.eclipse.jdt.internal.compiler.flow
Class LoopingFlowContext

java.lang.Object
  org.eclipse.jdt.internal.compiler.flow.FlowContext
      org.eclipse.jdt.internal.compiler.flow.SwitchFlowContext
          org.eclipse.jdt.internal.compiler.flow.LoopingFlowContext

All Implemented Interfaces:

TypeConstants

public class LoopingFlowContext
extends SwitchFlowContext

Reflects the context of code analysis, keeping track of enclosing try statements, exception handlers, etc...

Field Summary

BranchLabel	continueLabel
UnconditionalFlowInfo	initsOnContinue

Fields inherited from class org.eclipse.jdt.internal.compiler.flow.SwitchFlowContext

breakLabel, initsOnBreak

Fields inherited from class org.eclipse.jdt.internal.compiler.flow.FlowContext

associatedNode, CAN_ONLY_NON_NULL, CAN_ONLY_NULL, CAN_ONLY_NULL_NON_NULL, initsOnFinally, MAY_NULL, NotContinuableContext, parent

Fields inherited from interface org.eclipse.jdt.internal.compiler.lookup.TypeConstants

ANNOTATION, ANNOTATION_PREFIX, ANNOTATION_SUFFIX, ANONYM_PREFIX, ANONYM_SUFFIX, BOOLEAN, BYTE, CHAR, CharArray_JAVA_IO_OBJECTINPUTSTREAM, CharArray_JAVA_IO_OBJECTOUTPUTSTREAM, CharArray_JAVA_IO_OBJECTSTREAMFIELD, CharArray_JAVA_LANG_ANNOTATION_ANNOTATION, CharArray_JAVA_LANG_ENUM, CharArray_JAVA_LANG_OBJECT, CLINIT, CLONE, CONSTRAINT_EQUAL, CONSTRAINT_EXTENDS, CONSTRAINT_SUPER, DOUBLE, FLOAT, GETCLASS, INIT, INT, IO, JAVA, JAVA_IO, JAVA_IO_PRINTSTREAM, JAVA_IO_SERIALIZABLE, JAVA_LANG, JAVA_LANG_ANNOTATION_ANNOTATION, JAVA_LANG_ANNOTATION_DOCUMENTED, JAVA_LANG_ANNOTATION_ELEMENTTYPE, JAVA_LANG_ANNOTATION_INHERITED, JAVA_LANG_ANNOTATION_RETENTION, JAVA_LANG_ANNOTATION_RETENTIONPOLICY, JAVA_LANG_ANNOTATION_TARGET, JAVA_LANG_ASSERTIONERROR, JAVA_LANG_BOOLEAN, JAVA_LANG_BYTE, JAVA_LANG_CHARACTER, JAVA_LANG_CLASS, JAVA_LANG_CLASSNOTFOUNDEXCEPTION, JAVA_LANG_CLONEABLE, JAVA_LANG_DEPRECATED, JAVA_LANG_DOUBLE, JAVA_LANG_ENUM, JAVA_LANG_ERROR, JAVA_LANG_EXCEPTION, JAVA_LANG_FLOAT, JAVA_LANG_ILLEGALARGUMENTEXCEPTION, JAVA_LANG_INTEGER, JAVA_LANG_ITERABLE, JAVA_LANG_LONG, JAVA_LANG_NOCLASSDEFERROR, JAVA_LANG_OBJECT, JAVA_LANG_OVERRIDE, JAVA_LANG_REFLECT_CONSTRUCTOR, JAVA_LANG_REFLECT_FIELD, JAVA_LANG_REFLECT_METHOD, JAVA_LANG_RUNTIMEEXCEPTION, JAVA_LANG_SHORT, JAVA_LANG_STRING, JAVA_LANG_STRINGBUFFER, JAVA_LANG_STRINGBUILDER, JAVA_LANG_SUPPRESSWARNINGS, JAVA_LANG_SYSTEM, JAVA_LANG_THROWABLE, JAVA_LANG_VOID, JAVA_UTIL_ITERATOR, LANG, LENGTH, LONG, MAIN, MISMATCH, NULL, OBJECT, OK, PACKAGE_INFO_NAME, READOBJECT, READRESOLVE, REFLECT, SERIALPERSISTENTFIELDS, SERIALVERSIONUID, SHORT, SYNTHETIC_ACCESS_METHOD_PREFIX, SYNTHETIC_ASSERT_DISABLED, SYNTHETIC_CLASS, SYNTHETIC_ENCLOSING_INSTANCE_PREFIX, SYNTHETIC_ENUM_VALUES, SYNTHETIC_OUTER_LOCAL_PREFIX, SYNTHETIC_SWITCH_ENUM_TABLE, TYPE, UNCHECKED, UPPER_ANNOTATION_TYPE, UPPER_CLASS, UPPER_CONSTRUCTOR, UPPER_FIELD, UPPER_LOCAL_VARIABLE, UPPER_METHOD, UPPER_PACKAGE, UPPER_PARAMETER, UPPER_RUNTIME, UPPER_SOURCE, VALUE, VALUEOF, VALUES, VOID, WILDCARD_CAPTURE, WILDCARD_CAPTURE_NAME, WILDCARD_EXTENDS, WILDCARD_MINUS, WILDCARD_NAME, WILDCARD_PLUS, WILDCARD_STAR, WILDCARD_SUPER, WRITEOBJECT, WRITEREPLACE

Constructor Summary

LoopingFlowContext(FlowContext parent, FlowInfo upstreamNullFlowInfo, ASTNode associatedNode, BranchLabel breakLabel, BranchLabel continueLabel, Scope associatedScope)

Method Summary

void	complainOnDeferredFinalChecks(BlockScope scope, FlowInfo flowInfo) Perform deferred checks relative to final variables duplicate initialization of lack of initialization.
void	complainOnDeferredNullChecks(BlockScope scope, FlowInfo flowInfo) Perform deferred checks relative to the null status of local variables.
BranchLabel	continueLabel()
java.lang.String	individualToString()
boolean	isContinuable()
boolean	isContinuedTo()
void	recordContinueFrom(FlowContext innerFlowContext, FlowInfo flowInfo)
protected boolean	recordFinalAssignment(VariableBinding binding, Reference finalAssignment)
protected void	recordNullReference(LocalVariableBinding local, Expression expression, int status) Record a null reference for use by deferred checks.
void	recordUsingNullReference(Scope scope, LocalVariableBinding local, Expression reference, int checkType, FlowInfo flowInfo) Record a null reference for use by deferred checks.

Methods inherited from class org.eclipse.jdt.internal.compiler.flow.SwitchFlowContext

breakLabel, isBreakable, recordBreakFrom

Methods inherited from class org.eclipse.jdt.internal.compiler.flow.FlowContext

checkExceptionHandlers, checkExceptionHandlers, getTargetContextForBreakLabel, getTargetContextForContinueLabel, getTargetContextForDefaultBreak, getTargetContextForDefaultContinue, initsOnBreak, initsOnReturn, isNonReturningContext, isSubRoutine, labelName, recordReturnFrom, recordSettingFinal, subroutine, toString

Methods inherited from class java.lang.Object

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

Field Detail

continueLabel

public BranchLabel continueLabel

initsOnContinue

public UnconditionalFlowInfo initsOnContinue

Constructor Detail

LoopingFlowContext

public LoopingFlowContext(FlowContext parent,
                          FlowInfo upstreamNullFlowInfo,
                          ASTNode associatedNode,
                          BranchLabel breakLabel,
                          BranchLabel continueLabel,
                          Scope associatedScope)

Method Detail

complainOnDeferredFinalChecks

public void complainOnDeferredFinalChecks(BlockScope scope,
                                          FlowInfo flowInfo)

Perform deferred checks relative to final variables duplicate initialization of lack of initialization.

Parameters:

scope - the scope to which this context is associated

flowInfo - the flow info against which checks must be performed

complainOnDeferredNullChecks

public void complainOnDeferredNullChecks(BlockScope scope,
                                         FlowInfo flowInfo)

Perform deferred checks relative to the null status of local variables.

Parameters:

scope - the scope to which this context is associated

flowInfo - the flow info against which checks must be performed

continueLabel

public BranchLabel continueLabel()

Overrides:

continueLabel in class FlowContext

individualToString

public java.lang.String individualToString()

Overrides:

individualToString in class SwitchFlowContext

isContinuable

public boolean isContinuable()

Overrides:

isContinuable in class FlowContext

isContinuedTo

public boolean isContinuedTo()

recordContinueFrom

public void recordContinueFrom(FlowContext innerFlowContext,
                               FlowInfo flowInfo)

Overrides:

recordContinueFrom in class FlowContext

recordFinalAssignment

protected boolean recordFinalAssignment(VariableBinding binding,
                                        Reference finalAssignment)

Overrides:

recordFinalAssignment in class FlowContext

recordNullReference

protected void recordNullReference(LocalVariableBinding local,
                                   Expression expression,
                                   int status)

Description copied from class: FlowContext

Record a null reference for use by deferred checks. Only looping or finally contexts really record that information.

Overrides:

recordNullReference in class FlowContext

Parameters:

local - the local variable involved in the check

expression - the expression within which local lays

status - the status against which the check must be performed; one of CAN_ONLY_NULL, CAN_ONLY_NULL_NON_NULL, MAY_NULL

recordUsingNullReference

public void recordUsingNullReference(Scope scope,
                                     LocalVariableBinding local,
                                     Expression reference,
                                     int checkType,
                                     FlowInfo flowInfo)

Description copied from class: FlowContext

Record a null reference for use by deferred checks. Only looping or finally contexts really record that information. The context may emit an error immediately depending on the status of local against flowInfo and its nature (only looping of finally contexts defer part of the checks; nonetheless, contexts that are nested into a looping or a finally context get affected and delegate some checks to their enclosing context).

Overrides:

recordUsingNullReference in class FlowContext

Parameters:

scope - the scope into which the check is performed

local - the local variable involved in the check

reference - the expression within which local lies

checkType - the status against which the check must be performed; one of CAN_ONLY_NULL, CAN_ONLY_NULL_NON_NULL, MAY_NULL

flowInfo - the flow info at the check point; deferring contexts will perform supplementary checks against flow info instances that cannot be known at the time of calling this method (they are influenced by code that follows the current point)