com.taggercat.util
Class ExpressionUtils

java.lang.Object
  com.taggercat.util.ExpressionUtils

public class ExpressionUtils
extends java.lang.Object

A set of static utility functions used for expression evaluation.

Field Summary

static java.util.Map<java.lang.String,java.lang.Integer>

namedScopes

Constructor Summary

ExpressionUtils()

Method Summary

static java.lang.Object	executeMethod(java.lang.Object startingObject, java.lang.String methodName) Executes an action method on the entity.
static java.lang.Object	executeMethod(java.lang.Object startingObject, java.lang.String methodName, java.lang.Object[] arguments, java.lang.Class<?>[] parameterTypes) Executes an action method on the entity.
static java.lang.Object	getBeanProperty(java.lang.Object startingObject, java.lang.String scopedMethodName) Gets the bean property.
static java.lang.Object	resolveTerm(java.lang.String term, Model model, javax.servlet.http.HttpServletRequest request) Resolves the term to a scoped variable, or a data source field.
static java.lang.Object	resolveTerm(java.lang.String term, Model model, javax.servlet.http.HttpServletRequest request, javax.servlet.jsp.PageContext pageContext) Resolves the term to a scoped variable, or a datasource field.

Methods inherited from class java.lang.Object

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

Field Detail

namedScopes

public static java.util.Map<java.lang.String,java.lang.Integer> namedScopes

Constructor Detail

ExpressionUtils

public ExpressionUtils()

Method Detail

resolveTerm

public static java.lang.Object resolveTerm(java.lang.String term,
                                           Model model,
                                           javax.servlet.http.HttpServletRequest request)
                                    throws java.lang.IllegalArgumentException

Resolves the term to a scoped variable, or a data source field.

Throws:

java.lang.IllegalArgumentException

Parameters:

term - the dot delimited term to resolve

model - the current model object

request - the current request object

Returns:

the resolved term, or null if the term is not located

resolveTerm

public static java.lang.Object resolveTerm(java.lang.String term,
                                           Model model,
                                           javax.servlet.http.HttpServletRequest request,
                                           javax.servlet.jsp.PageContext pageContext)
                                    throws java.lang.IllegalArgumentException

Resolves the term to a scoped variable, or a datasource field.

Throws:

java.lang.IllegalArgumentException

Parameters:

term - the dot delimited term to resolve

model - the current model object

request - the current request object

pageContext - the current page context, this only applies to JSP tags

Returns:

the resolved term, or null if the term is not located

getBeanProperty

public static java.lang.Object getBeanProperty(java.lang.Object startingObject,
                                               java.lang.String scopedMethodName)
                                        throws java.lang.IllegalArgumentException

Gets the bean property.

Throws:

java.lang.IllegalArgumentException

Parameters:

startingObject - the source, or starting object to execute the method on

scopedMethodName - the method name of the form = "customer.order.account.foo";

Returns:

the property returned from the last getter, eg. getFoo()

executeMethod

public static java.lang.Object executeMethod(java.lang.Object startingObject,
                                             java.lang.String methodName)
                                      throws java.lang.Exception

Executes an action method on the entity. The action method is called in response to a constraint condition being evaluated to true, and an action method is specified. The action method must be a no-argument method.

Throws:

java.lang.Exception

Parameters:

startingObject -

methodName -

Returns:

the result of the method call

executeMethod

public static java.lang.Object executeMethod(java.lang.Object startingObject,
                                             java.lang.String methodName,
                                             java.lang.Object[] arguments,
                                             java.lang.Class<?>[] parameterTypes)
                                      throws java.lang.Exception

Executes an action method on the entity. The action method is called in response to a constraint condition being evaluated to true, and an action method is specified. The action method must be a no-argument method.

Throws:

java.lang.Exception

Parameters:

startingObject - the starting object

methodName - the dot delimited method name

arguments - the args

Returns:

the result of the method call