SimpleNode (Apache Tomcat 7.0.104 API Documentation)

org.apache.el.parser

## Class SimpleNode

- java.lang.Object
- - org.apache.el.lang.ELSupport
  - - org.apache.el.parser.SimpleNode

- All Implemented Interfaces:
    Node
  Direct Known Subclasses:
    ArithmeticNode, AstBracketSuffix, AstChoice, AstCompositeExpression, AstDeferredExpression, AstDotSuffix, AstDynamicExpression, AstEmpty, AstFloatingPoint, AstFunction, AstIdentifier, AstInteger, AstLiteralExpression, AstMethodParameters, AstNegative, AstNot, AstNull, AstString, AstValue, BooleanNode

      public abstract class SimpleNode
      extends ELSupport
      implements Node

  Author:
    Jacob Hookom [jacob@hookom.net]

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected Node[]` | `children`
    `protected int` | `id`
    `protected String` | `image`
    `protected Node` | `parent`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `SimpleNode(int i)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `accept(NodeVisitor visitor)`
    `boolean` | `equals(Object obj)`
    `String` | `getImage()`
    `MethodInfo` | `getMethodInfo(EvaluationContext ctx, Class<?>[] paramTypes)`
    `Class<?>` | `getType(EvaluationContext ctx)`
    `Object` | `getValue(EvaluationContext ctx)`
    `ValueReference` | `getValueReference(EvaluationContext ctx)`
    `int` | `hashCode()`
    `Object` | `invoke(EvaluationContext ctx, Class<?>[] paramTypes, Object[] paramValues)`
    `boolean` | `isParametersProvided()`
    `boolean` | `isReadOnly(EvaluationContext ctx)`
    `void` | `jjtAddChild(Node n, int i)` This method tells the node to add its argument to the node's list of children.
    `void` | `jjtClose()` This method is called after all the child nodes have been added.
    `Node` | `jjtGetChild(int i)` This method returns a child node.
    `int` | `jjtGetNumChildren()` Return the number of children the node has.
    `Node` | `jjtGetParent()`
    `void` | `jjtOpen()` This method is called after the node has been made the current node.
    `void` | `jjtSetParent(Node n)` This pair of methods are used to inform the node of its parent.
    `void` | `setImage(String image)`
    `void` | `setValue(EvaluationContext ctx, Object value)`
    `String` | `toString()`
    `String` | `toString(String prefix)`

    - ### Methods inherited from class org.apache.el.lang.ELSupport

      `coerceToBoolean, coerceToCharacter, coerceToEnum, coerceToNumber, coerceToNumber, coerceToNumber, coerceToString, coerceToType, compare, equals, isBigDecimalOp, isBigIntegerOp, isDoubleOp, isLongOp, isStringFloat`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### parent

          protected Node parent

    - #### children

          protected Node[] children

    - #### id

          protected int id

    - #### image

          protected String image

  - ### Constructor Detail

    - #### SimpleNode

          public SimpleNode(int i)

  - ### Method Detail

    - #### jjtOpen

          public void jjtOpen()

      Description copied from interface: `Node`
      This method is called after the node has been made the current node. It indicates that child nodes can now be added to it.
      Specified by:
        `jjtOpen` in interface `Node`

    - #### jjtClose

          public void jjtClose()

      Description copied from interface: `Node`
      This method is called after all the child nodes have been added.
      Specified by:
        `jjtClose` in interface `Node`

    - #### jjtSetParent

          public void jjtSetParent(Node n)

      Description copied from interface: `Node`
      This pair of methods are used to inform the node of its parent.
      Specified by:
        `jjtSetParent` in interface `Node`

    - #### jjtGetParent

          public Node jjtGetParent()

      Specified by:
        `jjtGetParent` in interface `Node`

    - #### jjtAddChild

          public void jjtAddChild(Node n,
                         int i)

      Description copied from interface: `Node`
      This method tells the node to add its argument to the node's list of children.
      Specified by:
        `jjtAddChild` in interface `Node`

    - #### jjtGetChild

          public Node jjtGetChild(int i)

      Description copied from interface: `Node`
      This method returns a child node. The children are numbered from zero, left to right.
      Specified by:
        `jjtGetChild` in interface `Node`

    - #### jjtGetNumChildren

          public int jjtGetNumChildren()

      Description copied from interface: `Node`
      Return the number of children the node has.
      Specified by:
        `jjtGetNumChildren` in interface `Node`

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`

    - #### toString

          public String toString(String prefix)

    - #### getImage

          public String getImage()

      Specified by:
        `getImage` in interface `Node`

    - #### setImage

          public void setImage(String image)

    - #### getType

          public Class<?> getType(EvaluationContext ctx)
                           throws ELException

      Specified by:
        `getType` in interface `Node`
      Throws:
        `ELException`

    - #### getValue

          public Object getValue(EvaluationContext ctx)
                          throws ELException

      Specified by:
        `getValue` in interface `Node`
      Throws:
        `ELException`

    - #### isReadOnly

          public boolean isReadOnly(EvaluationContext ctx)
                             throws ELException

      Specified by:
        `isReadOnly` in interface `Node`
      Throws:
        `ELException`

    - #### setValue

          public void setValue(EvaluationContext ctx,
                      Object value)
                        throws ELException

      Specified by:
        `setValue` in interface `Node`
      Throws:
        `ELException`

    - #### accept

          public void accept(NodeVisitor visitor)
                      throws Exception

      Specified by:
        `accept` in interface `Node`
      Throws:
        `Exception`

    - #### invoke

          public Object invoke(EvaluationContext ctx,
                      Class<?>[] paramTypes,
                      Object[] paramValues)
                        throws ELException

      Specified by:
        `invoke` in interface `Node`
      Throws:
        `ELException`

    - #### getMethodInfo

          public MethodInfo getMethodInfo(EvaluationContext ctx,
                                 Class<?>[] paramTypes)
                                   throws ELException

      Specified by:
        `getMethodInfo` in interface `Node`
      Throws:
        `ELException`

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `Object`

    - #### equals

          public boolean equals(Object obj)

      Overrides:
        `equals` in class `Object`

    - #### getValueReference

          public ValueReference getValueReference(EvaluationContext ctx)

      Specified by:
        `getValueReference` in interface `Node`
      Since:
        EL 2.2

    - #### isParametersProvided

          public boolean isParametersProvided()

      Specified by:
        `isParametersProvided` in interface `Node`
      Since:
        EL 2.2

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