com.wewebu.expression.language
Class OwExprScopedProperty

java.lang.Object
  com.wewebu.expression.language.OwExprScopedProperty

All Implemented Interfaces:

OwExprProperty, OwExprScope

Direct Known Subclasses:

OwExprObjectProperty

public abstract class OwExprScopedProperty
extends Object
implements OwExprProperty

OwExprScopedProperty.

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Constructor Summary

OwExprScopedProperty()

Method Summary

OwExprProperty	at(int index_p) Indexed scope access method
OwExprFunction	function(String functionName_p, OwExprExpressionType[] argunmentTypes_p) Function access method.
boolean	hasProperty(String propertyName_p) Property access helper method.
int	length() Indexed scope access helper method
OwExprProperty	property(String propertyName_p) Property access method.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.wewebu.expression.language.OwExprProperty

javaType, type, value

Constructor Detail

OwExprScopedProperty

public OwExprScopedProperty()

Method Detail

at

public final OwExprProperty at(int index_p)
                        throws OwExprEvaluationException

Description copied from interface: OwExprScope

Indexed scope access method

Specified by:

at in interface OwExprScope

Parameters:

index_p - int index of the requested property

Returns:

the OwExprProperty property found at the requested index

Throws:

OwExprEvaluationException - if the requested indexed access has failed (index out of bounds, the creation of OwExprProperty has failed)

function

public final OwExprFunction function(String functionName_p,
                                     OwExprExpressionType[] argunmentTypes_p)
                              throws OwExprEvaluationException

Description copied from interface: OwExprScope

Function access method.

Specified by:

function in interface OwExprScope

Parameters:

functionName_p - the name of the requested function

argunmentTypes_p - array of OwExprExpressionType that defines the argument signature of the requested function

Returns:

an OwExprFunction with the requested name and argument signature residing in this scope

Throws:

OwExprEvaluationException - if the requested function is not found in this scope or the creation of the corresponding OwExprFunction has failed

length

public final int length()
                 throws OwExprEvaluationException

Description copied from interface: OwExprScope

Indexed scope access helper method

Specified by:

length in interface OwExprScope

Returns:

the maximum index range for which indexed access is possible in this scope

Throws:

OwExprEvaluationException

property

public final OwExprProperty property(String propertyName_p)
                              throws OwExprEvaluationException

Description copied from interface: OwExprScope

Property access method.

Specified by:

property in interface OwExprScope

Parameters:

propertyName_p - the name of the requested property

Returns:

an OwExprProperty with the requested name residing in this scope

Throws:

OwExprEvaluationException - if the requested property is not found in this scope or the creation of the corresponding OwExprProperty has failed

hasProperty

public boolean hasProperty(String propertyName_p)
                    throws OwExprEvaluationException

Description copied from interface: OwExprScope

Property access helper method. Checks if a property is valid in this scope.

Specified by:

hasProperty in interface OwExprScope

Parameters:

propertyName_p - the name of the requested property

Returns:

true if this scope can perform property access for the requested property - an access via OwExprScope.property(String) will NOT fail on missing property grounds, false otherwise

Throws:

OwExprEvaluationException - if the property validity check has failed