jif.types.label
Class MeetPolicy_c

java.lang.Object
  polyglot.types.TypeObject_c
      jif.types.label.Policy_c
          jif.types.label.MeetPolicy_c

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Policy, polyglot.types.TypeObject, polyglot.util.Copy

Direct Known Subclasses:

MeetConfPolicy_c, MeetIntegPolicy_c

public abstract class MeetPolicy_c
extends Policy_c

Represents the meet of a number of policies.

See Also:

Serialized Form

Field Summary

Fields inherited from class polyglot.types.TypeObject_c

position, ts

Constructor Summary

MeetPolicy_c(java.util.Set components, JifTypeSystem ts, polyglot.util.Position pos)

Method Summary

protected abstract Policy	constructMeetPolicy(java.util.Set components, polyglot.util.Position pos)
boolean	equalsImpl(polyglot.types.TypeObject o)
int	hashCode()
boolean	hasVariables()
boolean	hasWritersToReaders()
boolean	isBottom()
boolean	isCanonical()
boolean	isRuntimeRepresentable()
boolean	isSingleton()
boolean	isTop()
PathMap	labelCheck(JifContext A, LabelChecker lc)
protected boolean	leq_(Policy p, LabelEnv env, LabelEnv.SearchState state)
java.util.Collection	meetComponents()
protected Policy	simplifyImpl()
Policy	subst(LabelSubstitution substitution)
java.util.List	throwTypes(polyglot.types.TypeSystem ts)
java.lang.String	toString(java.util.Set printedLabels)

Methods inherited from class jif.types.label.Policy_c

copy, simplify, toString

Methods inherited from class polyglot.types.TypeObject_c

equals, position, typeSystem

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface polyglot.types.TypeObject

position, typeSystem

Constructor Detail

MeetPolicy_c

public MeetPolicy_c(java.util.Set components,
                    JifTypeSystem ts,
                    polyglot.util.Position pos)

Method Detail

isSingleton

public boolean isSingleton()

isCanonical

public boolean isCanonical()

isRuntimeRepresentable

public boolean isRuntimeRepresentable()

equalsImpl

public boolean equalsImpl(polyglot.types.TypeObject o)

Specified by:

equalsImpl in interface polyglot.types.TypeObject

Specified by:

equalsImpl in class Policy_c

hashCode

public int hashCode()

Overrides:

hashCode in class polyglot.types.TypeObject_c

toString

public java.lang.String toString(java.util.Set printedLabels)

Specified by:

toString in interface Policy

Specified by:

toString in class Policy_c

leq_

protected boolean leq_(Policy p,
                       LabelEnv env,
                       LabelEnv.SearchState state)

meetComponents

public java.util.Collection meetComponents()

simplifyImpl

protected Policy simplifyImpl()

Specified by:

simplifyImpl in class Policy_c

Returns:

An equivalent label with fewer components by pulling out less restrictive policies.

constructMeetPolicy

protected abstract Policy constructMeetPolicy(java.util.Set components,
                                              polyglot.util.Position pos)

throwTypes

public java.util.List throwTypes(polyglot.types.TypeSystem ts)

subst

public Policy subst(LabelSubstitution substitution)
             throws polyglot.types.SemanticException

Throws:

polyglot.types.SemanticException

hasWritersToReaders

public boolean hasWritersToReaders()

Specified by:

hasWritersToReaders in interface Policy

Overrides:

hasWritersToReaders in class Policy_c

hasVariables

public boolean hasVariables()

Specified by:

hasVariables in interface Policy

Overrides:

hasVariables in class Policy_c

labelCheck

public PathMap labelCheck(JifContext A,
                          LabelChecker lc)

isTop

public boolean isTop()

isBottom

public boolean isBottom()