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?