Class AstRightValue

java.lang.Object
de.odysseus.el.tree.impl.ast.AstNode
de.odysseus.el.tree.impl.ast.AstRightValue
All Implemented Interfaces:
ExpressionNode, Node
Direct Known Subclasses:
AstBinary, AstChoice, AstComposite, AstFunction, AstLiteral, AstNested, AstParameters, AstUnary
public abstract class AstRightValue extends AstNode

  • Constructor Details

    • AstRightValue

      public AstRightValue()

  • Method Details

    • isLiteralText

      public final boolean isLiteralText()
      Answer false
      Returns:
      true if this node represents literal text

    • getType

      public final Class<?> getType(Bindings bindings, javax.el.ELContext context)
      according to the spec, the result is undefined for rvalues, so answer null
      Parameters:
      bindings - bindings containing variables and functions
      context - evaluation context
      Returns:
      accepted type or null for non-lvalue nodes

    • isReadOnly

      public final boolean isReadOnly(Bindings bindings, javax.el.ELContext context)
      non-lvalues are always readonly, so answer true
      Parameters:
      bindings - bindings containing variables and functions
      context - evaluation context
      Returns:
      true if this a read-only expression node

    • setValue

      public final void setValue(Bindings bindings, javax.el.ELContext context, Object value)
      non-lvalues are always readonly, so throw an exception
      Parameters:
      bindings - bindings containing variables and functions
      context - evaluation context
      value - value to set

    • getMethodInfo

      public final javax.el.MethodInfo getMethodInfo(Bindings bindings, javax.el.ELContext context, Class<?> returnType, Class<?>[] paramTypes)
      Description copied from interface: ExpressionNode
      Get method information. If this is a non-lvalue node, answer null.
      Parameters:
      bindings - bindings containing variables and functions
      context - evaluation context
      returnType - expected method return type (may be null meaning don't care)
      paramTypes - expected method argument types
      Returns:
      method information or null

    • invoke

      public final Object invoke(Bindings bindings, javax.el.ELContext context, Class<?> returnType, Class<?>[] paramTypes, Object[] paramValues)
      Description copied from interface: ExpressionNode
      Invoke method.
      Parameters:
      bindings - bindings containing variables and functions
      context - evaluation context
      returnType - expected method return type (may be null meaning don't care)
      paramTypes - expected method argument types
      paramValues - parameter values
      Returns:
      result of the method invocation

    • isLeftValue

      public final boolean isLeftValue()
      Returns:
      true if the subtree rooted at this node could be used as an lvalue expression (identifier or property sequence with non-literal prefix).

    • isMethodInvocation

      public boolean isMethodInvocation()
      Returns:
      true if the subtree rooted at this node is a method invocation.

    • getValueReference

      public final javax.el.ValueReference getValueReference(Bindings bindings, javax.el.ELContext context)
      Description copied from interface: ExpressionNode
      Get value reference.
      Parameters:
      bindings -
      context -
      Returns:
      value reference