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## 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

Version:
  $Id: SimpleNode.java 1060907 2011-01-19 19:08:36Z markt $
Author:
  Jacob Hookom [jacob@hookom.net]

Field Summary
`protected Node[]` | `children`
`protected int` | `id`
`protected String` | `image`
`protected Node` | `parent`

Constructor Summary
`SimpleNode(int i)`

Method Summary
`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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