org.eclipse.jdt.internal.compiler.flow
类 FlowContext

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

所有已实现的接口：

TypeConstants

直接已知子类：

ExceptionHandlingFlowContext, FinallyFlowContext, InsideSubRoutineFlowContext, SwitchFlowContext

public class FlowContext
extends Object
implements TypeConstants

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

字段摘要

ASTNode	associatedNode
static int	CAN_ONLY_NON_NULL
static int	CAN_ONLY_NULL
static int	CAN_ONLY_NULL_NON_NULL
static int	CHECK_MASK
static int	CONTEXT_MASK
static int	DEFER_NULL_DIAGNOSTIC
static int	HIDE_NULL_COMPARISON_WARNING used to hide null comparison related warnings inside assert statements
static int	IN_ASSIGNMENT
static int	IN_COMPARISON_NON_NULL
static int	IN_COMPARISON_NULL
static int	IN_INSTANCEOF
NullInfoRegistry	initsOnFinally
static int	MAY_NULL
static FlowContext	NotContinuableContext
FlowContext	parent
static int	PREEMPT_NULL_DIAGNOSTIC
int	tagBits

从接口 org.eclipse.jdt.internal.compiler.lookup.TypeConstants 继承的字段

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, EQUALS, FLOAT, GETCLASS, HASHCODE, INIT, INT, INVOKE, IO, JAVA, JAVA_IO, JAVA_IO_EXTERNALIZABLE, JAVA_IO_IOEXCEPTION, JAVA_IO_OBJECTINPUTSTREAM, JAVA_IO_OBJECTOUTPUTSTREAM, JAVA_IO_OBJECTSTREAMEXCEPTION, 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_AUTOCLOSEABLE, 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_INVOKE_METHODHANDLE_$_POLYMORPHICSIGNATURE, JAVA_LANG_INVOKE_METHODHANDLE_POLYMORPHICSIGNATURE, 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_SAFEVARARGS, 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_COLLECTION, JAVA_UTIL_ITERATOR, JAVAX_RMI_CORBA_STUB, 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_CONSTANT_INITIALIZATION_METHOD_PREFIX, SYNTHETIC_ENUM_VALUES, SYNTHETIC_OUTER_LOCAL_PREFIX, SYNTHETIC_STATIC_FACTORY, 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, UTIL, VALUE, VALUEOF, VALUES, VOID, WILDCARD_CAPTURE, WILDCARD_CAPTURE_NAME_PREFIX, WILDCARD_CAPTURE_NAME_SUFFIX, WILDCARD_EXTENDS, WILDCARD_MINUS, WILDCARD_NAME, WILDCARD_PLUS, WILDCARD_STAR, WILDCARD_SUPER, WRITEOBJECT, WRITEREPLACE

构造方法摘要

FlowContext(FlowContext parent, ASTNode associatedNode)

方法摘要

BranchLabel	breakLabel()
void	checkExceptionHandlers(TypeBinding[] raisedExceptions, ASTNode location, FlowInfo flowInfo, BlockScope scope)
void	checkExceptionHandlers(TypeBinding raisedException, ASTNode location, FlowInfo flowInfo, BlockScope scope)
void	checkExceptionHandlers(TypeBinding raisedException, ASTNode location, FlowInfo flowInfo, BlockScope scope, boolean isExceptionOnAutoClose)
BranchLabel	continueLabel()
FlowInfo	getInitsForFinalBlankInitializationCheck(TypeBinding declaringType, FlowInfo flowInfo)
FlowContext	getTargetContextForBreakLabel(char[] labelName)
FlowContext	getTargetContextForContinueLabel(char[] labelName)
FlowContext	getTargetContextForDefaultBreak()
FlowContext	getTargetContextForDefaultContinue()
String	individualToString()
FlowInfo	initsOnBreak()
UnconditionalFlowInfo	initsOnReturn()
boolean	isBreakable()
boolean	isContinuable()
boolean	isNonReturningContext()
boolean	isSubRoutine()
char[]	labelName()
void	recordBreakFrom(FlowInfo flowInfo)
void	recordBreakTo(FlowContext targetContext)
void	recordContinueFrom(FlowContext innerFlowContext, FlowInfo flowInfo)
protected boolean	recordFinalAssignment(VariableBinding variable, Reference finalReference)
protected void	recordNullReference(LocalVariableBinding local, Expression expression, int status) Record a null reference for use by deferred checks.
void	recordReturnFrom(UnconditionalFlowInfo flowInfo)
void	recordSettingFinal(VariableBinding variable, Reference finalReference, FlowInfo flowInfo)
void	recordUsingNullReference(Scope scope, LocalVariableBinding local, Expression reference, int checkType, FlowInfo flowInfo) Record a null reference for use by deferred checks.
SubRoutineStatement	subroutine()
String	toString()

从类 java.lang.Object 继承的方法

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

字段详细信息

NotContinuableContext

public static final FlowContext NotContinuableContext

associatedNode

public ASTNode associatedNode

parent

public FlowContext parent

initsOnFinally

public NullInfoRegistry initsOnFinally

tagBits

public int tagBits

DEFER_NULL_DIAGNOSTIC

public static final int DEFER_NULL_DIAGNOSTIC

另请参见：

常量字段值

PREEMPT_NULL_DIAGNOSTIC

public static final int PREEMPT_NULL_DIAGNOSTIC

另请参见：

常量字段值

HIDE_NULL_COMPARISON_WARNING

public static final int HIDE_NULL_COMPARISON_WARNING

used to hide null comparison related warnings inside assert statements

另请参见：

常量字段值

CAN_ONLY_NULL_NON_NULL

public static final int CAN_ONLY_NULL_NON_NULL

另请参见：

常量字段值

CAN_ONLY_NULL

public static final int CAN_ONLY_NULL

另请参见：

常量字段值

CAN_ONLY_NON_NULL

public static final int CAN_ONLY_NON_NULL

另请参见：

常量字段值

MAY_NULL

public static final int MAY_NULL

另请参见：

常量字段值

CHECK_MASK

public static final int CHECK_MASK

另请参见：

常量字段值

IN_COMPARISON_NULL

public static final int IN_COMPARISON_NULL

另请参见：

常量字段值

IN_COMPARISON_NON_NULL

public static final int IN_COMPARISON_NON_NULL

另请参见：

常量字段值

IN_ASSIGNMENT

public static final int IN_ASSIGNMENT

另请参见：

常量字段值

IN_INSTANCEOF

public static final int IN_INSTANCEOF

另请参见：

常量字段值

CONTEXT_MASK

public static final int CONTEXT_MASK

另请参见：

常量字段值

构造方法详细信息

FlowContext

public FlowContext(FlowContext parent,
                   ASTNode associatedNode)

方法详细信息

breakLabel

public BranchLabel breakLabel()

checkExceptionHandlers

public void checkExceptionHandlers(TypeBinding raisedException,
                                   ASTNode location,
                                   FlowInfo flowInfo,
                                   BlockScope scope)

checkExceptionHandlers

public void checkExceptionHandlers(TypeBinding raisedException,
                                   ASTNode location,
                                   FlowInfo flowInfo,
                                   BlockScope scope,
                                   boolean isExceptionOnAutoClose)

参数：

isExceptionOnAutoClose - This is for checking exception handlers for exceptions raised during the auto close of resources inside a try with resources statement. (Relevant for source levels 1.7 and above only)

checkExceptionHandlers

public void checkExceptionHandlers(TypeBinding[] raisedExceptions,
                                   ASTNode location,
                                   FlowInfo flowInfo,
                                   BlockScope scope)

continueLabel

public BranchLabel continueLabel()

getInitsForFinalBlankInitializationCheck

public FlowInfo getInitsForFinalBlankInitializationCheck(TypeBinding declaringType,
                                                         FlowInfo flowInfo)

getTargetContextForBreakLabel

public FlowContext getTargetContextForBreakLabel(char[] labelName)

getTargetContextForContinueLabel

public FlowContext getTargetContextForContinueLabel(char[] labelName)

getTargetContextForDefaultBreak

public FlowContext getTargetContextForDefaultBreak()

getTargetContextForDefaultContinue

public FlowContext getTargetContextForDefaultContinue()

individualToString

public String individualToString()

initsOnBreak

public FlowInfo initsOnBreak()

initsOnReturn

public UnconditionalFlowInfo initsOnReturn()

isBreakable

public boolean isBreakable()

isContinuable

public boolean isContinuable()

isNonReturningContext

public boolean isNonReturningContext()

isSubRoutine

public boolean isSubRoutine()

labelName

public char[] labelName()

recordBreakFrom

public void recordBreakFrom(FlowInfo flowInfo)

recordBreakTo

public void recordBreakTo(FlowContext targetContext)

recordContinueFrom

public void recordContinueFrom(FlowContext innerFlowContext,
                               FlowInfo flowInfo)

recordFinalAssignment

protected boolean recordFinalAssignment(VariableBinding variable,
                                        Reference finalReference)

recordNullReference

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

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

参数：

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, CAN_ONLY_NON_NULL, potentially combined with a context indicator (one of IN_COMPARISON_NULL, IN_COMPARISON_NON_NULL, IN_ASSIGNMENT or IN_INSTANCEOF)

recordReturnFrom

public void recordReturnFrom(UnconditionalFlowInfo flowInfo)

recordSettingFinal

public void recordSettingFinal(VariableBinding variable,
                               Reference finalReference,
                               FlowInfo flowInfo)

recordUsingNullReference

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

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).

参数：

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, potentially combined with a context indicator (one of IN_COMPARISON_NULL, IN_COMPARISON_NON_NULL, IN_ASSIGNMENT or IN_INSTANCEOF)

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)

subroutine

public SubRoutineStatement subroutine()

toString

public String toString()

覆盖：

类 Object 中的 toString