| 
 | ||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||
java.lang.Object | +--org.apache.commons.jexl.ExpressionFactory
Creates Expression objects. To create a JEXL Expression object, pass valid JEXL syntax to the static createExpression() method:
String jexl = "array[1]"; Expression expression = ExpressionFactory.createExpression( jexl );
 When an Expression object is created, the JEXL syntax is
 parsed and verified.  If the supplied expression is neither an
 expression nor a reference, an exception is thrown from createException().
 
| Field Summary | |
| protected static ExpressionFactory | efExpressionFactory is a singleton and this is the private instance fufilling that pattern. | 
| protected static Log | logThe Log to which all ExpressionFactory messages will be logged. | 
| protected static Parser | parserThe singleton ExpressionFactory also holds a single instance of Parser. | 
| Method Summary | |
| static Expression | createExpression(String expression)Creates an Expression from a String containing valid JEXL syntax. | 
| protected  Expression | createNewExpression(String expression)Creates a new Expression based on the expression string. | 
| protected static ExpressionFactory | getInstance()Returns the single instance of ExpressionFactory. | 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
| Field Detail | 
protected static Log log
protected static Parser parser
Parser.
 When parsing expressions, ExpressionFactory synchronizes on Parser.protected static ExpressionFactory ef
| Method Detail | 
protected static ExpressionFactory getInstance()
public static Expression createExpression(String expression)
                                   throws Exception
expression - A String containing valid JEXL syntaxException - An exception can be thrown if there is a problem
      parsing this expression, or if the expression is neither an
      expression or a reference.
protected Expression createNewExpression(String expression)
                                  throws Exception
expression - valid Jexl expressionException - for a variety of reasons - mostly malformed
          Jexl expression| 
 | ||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||