Class ExpressionFactory

java.lang.Object
jakarta.el.ExpressionFactory
public abstract class ExpressionFactory extends Object
Since:
2.1

  • Constructor Details

    • ExpressionFactory

      public ExpressionFactory()

  • Method Details

    • 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/jakarta.el.ExpressionFactory)
      2. $JRE_HOME/lib/el.properties - key jakarta.el.ExpressionFactory
      3. jakarta.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 <T> T coerceToType(Object obj, Class<T> expectedType)
      Coerce the supplied object to the requested type.
      Type Parameters:
      T - The type to which the object should be coerced
      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

    • getStreamELResolver

      public ELResolver getStreamELResolver()
      Returns:
      This default implementation returns null
      Since:
      EL 3.0

    • getInitFunctionMap

      public Map<String,Method> getInitFunctionMap()
      Returns:
      This default implementation returns null
      Since:
      EL 3.0