ExpressionFactory Class

com.bea.p13n.expression
ExpressionFactory Class

public abstract class ExpressionFactory

    extends Object

A factory class to create instances of the various implementation classes in the expression package.

Hierarchy
Object
  ExpressionFactory

Constructor Summary
ExpressionFactory()
 

Method Summary
public static Evaluator
createEvaluator(Map environment)
Creates a stateful Evaluator using the supplied environment.
public static Evaluator
createEvaluator(Map environment, UnificationList unificationList)
Creates an Evaluator object using the supplied environment and a UnificationList.
public static Executor
createExecutor(Map environment)
Creates an Executor if it is not cached, otherwise returns the cached Executor.
public static Expression
createExpression(Map environment, Reader reader)
Creates an Expression using the supplied environment, reading and parsing the characters from the supplied reader.
public static Expression
createExpression(Map environment, String xmlString)
Creates an Expression using the supplied environment and parsing the supplied string.
public static Optimizer
createOptimizer(Map environment, ObjectFilter objectFilter)
Creates an Optimizer using the supplied environment and an ObjectFilter.
public static UnificationList
createUnificationList(Map environment)
Creates a UnificationList using the supplied environment.
public static Unifier
createUnifier(Map environment, UnificationList unificationList)
Creates a Unifier using the supplied environment and the UnificationList.
public static Validator
createValidator(Map environment)
Creates a stateful Evaluator object using the supplied environment.
public static Validator
createValidator(Map environment, Evaluator evaluator)
Creates a Validator object using the supplied environment and an Evaluator.
 
Methods from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
   

Constructor Detail

ExpressionFactory

public ExpressionFactory()
 

Method Detail

createEvaluator(Map) Method

public static Evaluator createEvaluator(Map environment)
Creates a stateful Evaluator using the supplied environment.

Parameters

environment
The environment information to be used during creation of an Evaluator.

Returns

An Evaluator that can evaluate an expression.

Related Topics

Evaluator

createEvaluator(Map, UnificationList) Method

public static Evaluator createEvaluator(Map environment, 
                                        UnificationList unificationList)
Creates an Evaluator object using the supplied environment and a UnificationList. If the supplied UnificationList is null then a stateful Evaluator is returned, otherwise a stateless Evaluator is created by associating the supplied UnificationList.

Parameters

environment
The environment information to be used during creation of an Evaluator.
unificationList
An UnificationList.

Returns

An Evaluator that can evaluate an expression.

Related Topics

Evaluator

createExecutor(Map) Method

public static Executor createExecutor(Map environment)
Creates an Executor if it is not cached, otherwise returns the cached Executor.

Parameters

environment
The environment information to be used during creation of an Executor.

Returns

An Executor that can execute an expression.

Related Topics

Executor

createExpression(Map, Reader) Method

public static Expression createExpression(Map environment, 
                                          Reader reader)
     throws ExpressionException
Creates an Expression using the supplied environment, reading and parsing the characters from the supplied reader.

Parameters

environment
The information that is used to create an Expression.
reader
The reader from which the characters will be read and parsed into an expression object.

Returns

An Expression.

Exceptions

ExpressionException
If an error occurs during reading or parsing.

Related Topics

Expression

createExpression(Map, String) Method

public static Expression createExpression(Map environment, 
                                          String xmlString)
     throws ExpressionException
Creates an Expression using the supplied environment and parsing the supplied string.

Parameters

environment
The information that is used to create an Expression.
xmlString
The XML string that is read and parsed into an expression object.

Returns

An Expression.

Exceptions

ExpressionException
If an error occurs during parsing.

Related Topics

Expression

createOptimizer(Map, ObjectFilter) Method

public static Optimizer createOptimizer(Map environment, 
                                        ObjectFilter objectFilter)
Creates an Optimizer using the supplied environment and an ObjectFilter.

Parameters

environment
The information that is used to create an Optimizer.
objectFilter
An ObjectFilter that is used during optimization.

Returns

An Optimizer that can optimize an expression.

Related Topics

Optimizer

createUnificationList(Map) Method

public static UnificationList createUnificationList(Map environment)
Creates a UnificationList using the supplied environment.

Parameters

environment
A Map containing the environment information that is used to create a UnificationList.

Returns

A UnificationList.

Related Topics

UnificationList

createUnifier(Map, UnificationList) Method

public static Unifier createUnifier(Map environment, 
                                    UnificationList unificationList)
Creates a Unifier using the supplied environment and the UnificationList.

Parameters

environment
A Map containing environment information that is used to create a Unifier.
unificationList
A UnificationList that is used to bind variables to their values.

Returns

A Unifier that can unify an expression.

Related Topics

Unifier

createValidator(Map) Method

public static Validator createValidator(Map environment)
Creates a stateful Evaluator object using the supplied environment.

Parameters

environment
The environment information to be used during creation of the Evaluator.

Returns

A Validator that can validate an expression.

Related Topics

Validator

createValidator(Map, Evaluator) Method

public static Validator createValidator(Map environment, 
                                        Evaluator evaluator)
Creates a Validator object using the supplied environment and an Evaluator. If the supplied Evaluator is null then a stateful Validator is returned otherwise a stateless Validator is created by associating the given Evaluator.

Parameters

environment
The environment information to be used during creation of the Validator.
evaluator
An Evaluator to evaluate an expression during validation.

Returns

A Validator that can validate an expression.

Related Topics

Validator