com.wewebu.expression.language
Class OwExprReflectiveScope

java.lang.Object
  com.wewebu.expression.language.OwExprExternalScope
      com.wewebu.expression.language.OwExprReflectiveScope

All Implemented Interfaces:

OwExprScope

Direct Known Subclasses:

OwExprSystem

public class OwExprReflectiveScope
extends OwExprExternalScope

Reflective scopes are external scopes that rely on POJOs to prelevate functions and properties.
Getters of the underlying POJO will be interpreted as properties and methods will be interpreted as functions.

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Constructor Summary

OwExprReflectiveScope(String name_p)
Constructor

OwExprReflectiveScope(String name_p, Object javaObject_p)
Constructor

Method Summary

OwExprProperty	at(int index_p) Indexed scope access method form an array POJO.
boolean	hasProperty(String propertyName_p) Property access helper method.
int	length() Indexed scope access helper method
protected OwExprFunction	prelevateFunction(String functionName_p, OwExprExpressionType[] argumentTypes_p) Function search hook for OwExprExternalScope.function(String, OwExprExpressionType[]). Children of this class should override this method to perform custom
protected OwExprProperty	prelevateProperty(String propertyName_p) Property search hook for OwExprExternalScope.property(String).
String	toString()

Methods inherited from class com.wewebu.expression.language.OwExprExternalScope

addScope, function, getName, property

Methods inherited from class java.lang.Object

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

Constructor Detail

OwExprReflectiveScope

public OwExprReflectiveScope(String name_p)

Constructor

Parameters:

name_p - the name of this scope

OwExprReflectiveScope

public OwExprReflectiveScope(String name_p,
                             Object javaObject_p)

Constructor

Parameters:

name_p - the name of this scope

javaObject_p - underlying POJO

Method Detail

prelevateProperty

protected final OwExprProperty prelevateProperty(String propertyName_p)
                                          throws OwExprEvaluationException

Description copied from class: OwExprExternalScope

Property search hook for OwExprExternalScope.property(String).

Overrides:

prelevateProperty in class OwExprExternalScope

Returns:

a property that was previously added using OwExprExternalScope.addScope(OwExprExternalScope) or null if no such property was added

Throws:

OwExprEvaluationException

prelevateFunction

protected final OwExprFunction prelevateFunction(String functionName_p,
                                                 OwExprExpressionType[] argumentTypes_p)
                                          throws OwExprEvaluationException

Description copied from class: OwExprExternalScope

Function search hook for OwExprExternalScope.function(String, OwExprExpressionType[]).
Children of this class should override this method to perform custom

Overrides:

prelevateFunction in class OwExprExternalScope

Returns:

always null

Throws:

OwExprEvaluationException

at

public OwExprProperty at(int index_p)
                  throws OwExprEvaluationException

Indexed scope access method form an array POJO.

Specified by:

at in interface OwExprScope

Overrides:

at in class OwExprExternalScope

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)

length

public int length()
           throws OwExprEvaluationException

Description copied from interface: OwExprScope

Indexed scope access helper method

Specified by:

length in interface OwExprScope

Overrides:

length in class OwExprExternalScope

Returns:

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

Throws:

OwExprEvaluationException

toString

public String toString()

Overrides:

toString in class OwExprExternalScope

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

Overrides:

hasProperty in class OwExprExternalScope

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