[seam-commits] Seam SVN: r10988 - modules/trunk/el/src/main/java/org/jboss/seam/el.
Author: dan.j.allen
Date: 2009-05-26 11:25:15 -0400 (Tue, 26 May 2009)
New Revision: 10988
Modified:
modules/trunk/el/src/main/java/org/jboss/seam/el/Expressions.java
Log:
add some convenience methods
Modified: modules/trunk/el/src/main/java/org/jboss/seam/el/Expressions.java
===================================================================
--- modules/trunk/el/src/main/java/org/jboss/seam/el/Expressions.java 2009-05-26 15:24:28
UTC (rev 10987)
+++ modules/trunk/el/src/main/java/org/jboss/seam/el/Expressions.java 2009-05-26 15:25:15
UTC (rev 10988)
@@ -79,6 +79,58 @@
}
/**
+ * Get the value of a unified ValueExpression, coercing it to the expected type.
+ *
+ * @param expression a unified ValueExpression
+ * @param type the expected value type
+ *
+ * @return the value of the unified ValueExpression
+ */
+ @SuppressWarnings("unchecked")
+ public <T> T getValue(javax.el.ValueExpression expression, Class<T> type)
+ {
+ return (T) expression.getValue(getELContext());
+ }
+
+ /**
+ * Inspect the unified ValueExpression and return the value's expected type.
+ *
+ * @param expression a unified ValueExpression
+ *
+ * @return the value's expected type
+ */
+ public Class<?> getType(javax.el.ValueExpression expression)
+ {
+ return expression.getType(getELContext());
+ }
+
+ /**
+ * Assign the specified value to the unified ValueExpression.
+ *
+ * @param expression a unified ValueExpression
+ * @param value the value to assign to the ValueExpression
+ */
+ public void setValue(javax.el.ValueExpression expression, Object value)
+ {
+ expression.setValue(getELContext(), value);
+ }
+
+ /**
+ * Invoke the unified MethodExpression, coercing the result to the expected return
type.
+ *
+ * @param expression a unified MethodExpression
+ * @param returnType the expected return type
+ * @param args method arguments
+ *
+ * @return the return value of the underlying method represented by the unified
MethodExpression
+ */
+ @SuppressWarnings("unchecked")
+ public <T> T invoke(javax.el.MethodExpression expression, Class<T>
returnType, Object... args)
+ {
+ return (T) expression.invoke(getELContext(), args);
+ }
+
+ /**
* Create a value expression.
*
* @param expression a JBoss EL value expression
@@ -117,6 +169,7 @@
return getExpressionFactory().createValueExpression( getELContext(),
expression, type );
}
+ @SuppressWarnings("unchecked")
public T getValue()
{
return (T) toUnifiedValueExpression().getValue( getELContext() );
@@ -132,6 +185,7 @@
return expression;
}
+ @SuppressWarnings("unchecked")
public Class<T> getType()
{
// QUESTION shouldn't we use the type provided in the constructor?