org.eclipse.core.expressions

Class ExpressionInfo

java.lang.Object

org.eclipse.core.expressions.ExpressionInfo

public class ExpressionInfo
extends Object

A status object describing information about an expression tree. This information can for example be used to decide whether an expression tree has to be reevaluated if the value of some variables changes.

This class is not intended to be extended by clients.

Since:

3.2

Restriction:

This class is not intended to be subclassed by clients.

Constructor Summary

Constructors

Constructor and Description
ExpressionInfo()

Method Summary

Modifier and Type	Method and Description
void	addAccessedPropertyName(String name) Marks the given property (the fully qualified name of a PropertyTester property) as accessed.
void	addMisBehavingExpressionType(Class<?> clazz) Adds the given class to the list of misbehaving classes.
void	addVariableNameAccess(String name) Marks the given variable as accessed.
String[]	getAccessedPropertyNames() Returns the set of accessed PropertyTester properties.
String[]	getAccessedVariableNames() Returns the set of accessed variables.
Class<?>[]	getMisbehavingExpressionTypes() Returns the set of expression types which don't reimplement the new Expression.collectExpressionInfo(ExpressionInfo) method.
boolean	hasDefaultVariableAccess() Returns true if the default variable is accessed by the expression tree.
boolean	hasSystemPropertyAccess() Returns true if the system property is accessed by the expression tree.
void	markDefaultVariableAccessed() Marks the default variable as accessed.
void	markSystemPropertyAccessed() Marks the system property as accessed.
void	merge(ExpressionInfo other) Merges this reevaluation information with the given info.
void	mergeExceptDefaultVariable(ExpressionInfo other) Merges this reevaluation information with the given info ignoring the default variable access.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionInfo

public ExpressionInfo()

Method Detail

hasDefaultVariableAccess

public boolean hasDefaultVariableAccess()

Returns true if the default variable is accessed by the expression tree.

Returns:

whether the default variable is accessed or not

markDefaultVariableAccessed

public void markDefaultVariableAccessed()

Marks the default variable as accessed.

hasSystemPropertyAccess

public boolean hasSystemPropertyAccess()

Returns true if the system property is accessed by the expression tree.

Returns:

whether the system property is accessed or not

markSystemPropertyAccessed

public void markSystemPropertyAccessed()

Marks the system property as accessed.

getAccessedVariableNames

public String[] getAccessedVariableNames()

Returns the set of accessed variables.

Returns:

the set of accessed variables

addVariableNameAccess

public void addVariableNameAccess(String name)

Marks the given variable as accessed.

Parameters:

name - the accessed variable

getAccessedPropertyNames

public String[] getAccessedPropertyNames()

Returns the set of accessed PropertyTester properties.

Returns:

the fully qualified names of accessed properties, or an empty array

Since:

3.4

See Also:

for system properties

addAccessedPropertyName

public void addAccessedPropertyName(String name)

Marks the given property (the fully qualified name of a PropertyTester property) as accessed.

Parameters:

name - the fully qualified property name

Since:

3.4

See Also:

for system properties

getMisbehavingExpressionTypes

public Class<?>[] getMisbehavingExpressionTypes()

Returns the set of expression types which don't reimplement the new Expression.collectExpressionInfo(ExpressionInfo) method. If one expression in the expression tree didn't implement the method, then no optimizations can be done. Returns null if all expressions implement the method.

Returns:

the set of expression types which don't implement the computeReevaluationInfo method, or null if all do

addMisBehavingExpressionType

public void addMisBehavingExpressionType(Class<?> clazz)

Adds the given class to the list of misbehaving classes.

Parameters:

clazz - the class to add.

merge

public void merge(ExpressionInfo other)

Merges this reevaluation information with the given info.

Parameters:

other - the information to merge with

mergeExceptDefaultVariable

public void mergeExceptDefaultVariable(ExpressionInfo other)

Merges this reevaluation information with the given info ignoring the default variable access.

Parameters:

other - the information to merge with