Constructor Detail

• ExpressionFactory

  public ExpressionFactory()

Method Detail

• newInstance

  public static ExpressionFactory newInstance()

  Create a new ExpressionFactory. The class to use is determined by the following search order:

  1. services API (META-INF/services/javax.el.ExpressionFactory)
  2. $JRE_HOME/lib/el.properties - key javax.el.ExpressionFactory
  3. javax.el.ExpressionFactory
  4. Platform default implementation - org.apache.el.ExpressionFactoryImpl

  Returns:

  the new ExpressionFactory

• newInstance

  public static ExpressionFactory newInstance(Properties properties)

  Create a new ExpressionFactory passing in the provided Properties. Search order is the same as newInstance().

  Parameters:

  properties - the properties to be passed to the new instance (may be null)

  Returns:

  the new ExpressionFactory

• createValueExpression

  public abstract ValueExpression createValueExpression(ELContext context,
                                      String expression,
                                      Class<?> expectedType)

  Create a new value expression.

  Parameters:

  context - The EL context for this evaluation

  expression - The String representation of the value expression

  expectedType - The expected type of the result of evaluating the expression

  Returns:

  A new value expression formed from the input parameters

  Throws:

  NullPointerException - If the expected type is null

  ELException - If there are syntax errors in the provided expression

• createValueExpression

  public abstract ValueExpression createValueExpression(Object instance,
                                      Class<?> expectedType)

• createMethodExpression

  public abstract MethodExpression createMethodExpression(ELContext context,
                                        String expression,
                                        Class<?> expectedReturnType,
                                        Class<?>[] expectedParamTypes)

  Create a new method expression instance.

  Parameters:

  context - The EL context for this evaluation

  expression - The String representation of the method expression

  expectedReturnType - The expected type of the result of invoking the method

  expectedParamTypes - The expected types of the input parameters

  Returns:

  A new method expression formed from the input parameters.

  Throws:

  NullPointerException - If the expected parameters types are null

  ELException - If there are syntax errors in the provided expression

• coerceToType

  public abstract Object coerceToType(Object obj,
                    Class<?> expectedType)

  Coerce the supplied object to the requested type.

  Parameters:

  obj - The object to be coerced

  expectedType - The type to which the object should be coerced

  Returns:

  An instance of the requested type.

  Throws:

  ELException - If the conversion fails