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## org.apache.cayenne.exp.parser
Class ASTPath

    java.lang.Object
      org.apache.cayenne.exp.Expression
          org.apache.cayenne.exp.parser.SimpleNode
              org.apache.cayenne.exp.parser.ASTPath

All Implemented Interfaces:
  Serializable, Node, XMLSerializable

Direct Known Subclasses:
  ASTDbPath, ASTObjPath

    public abstract class ASTPath

extends SimpleNode

Generic path expression.

Since:
  1.1
Author:
  Andrus Adamchik
See Also:
  Serialized Form

Field Summary
`protected String` | `path`

Fields inherited from class org.apache.cayenne.exp.parser.SimpleNode
`children, id, parent`

Fields inherited from class org.apache.cayenne.exp.Expression
`ADD, AND, BETWEEN, DB_PATH, DIVIDE, EQUAL_TO, FALSE, GREATER_THAN, GREATER_THAN_EQUAL_TO, IN, LESS_THAN, LESS_THAN_EQUAL_TO, LIKE, LIKE_IGNORE_CASE, LIST, MULTIPLY, NEGATIVE, NOT, NOT_BETWEEN, NOT_EQUAL_TO, NOT_IN, NOT_LIKE, NOT_LIKE_IGNORE_CASE, OBJ_PATH, OR, PRUNED_NODE, SUBTRACT, TRUE, type`

Method Summary
`protected Object` | `evaluateEntityNode(Entity entity)` Helper method to evaluate path expression with Cayenne Entity.
`protected String` | `getExpressionOperator(int index)`
`Object` | `getOperand(int index)` Returns a value of operand at `index`.
`int` | `getOperandCount()` Returns a count of operands of this expression.
`protected String` | `getPath()`
`void` | `setOperand(int index, Object value)` Sets a value of operand at `index`.
`protected void` | `setPath(Object path)`

Methods inherited from class org.apache.cayenne.exp.parser.SimpleNode
`connectChildren, encodeAsEscapedString, encodeAsString, encodeScalarAsString, evaluate, evaluateChild, evaluateNode, expName, flattenTree, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, notExp, pruneNodeForPrunedChild, unwrapChild, wrapChild`

Methods inherited from class org.apache.cayenne.exp.Expression
`andExp, deepCopy, encodeAsXML, equals, expWithParameters, expWithParameters, filter, filterObjects, fromString, getType, joinExp, match, orExp, setType, shallowCopy, toString, transform, transformExpression, traverse, traverse`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### path

    protected String path

Method Detail

### getOperandCount

    public int getOperandCount()

  Description copied from class: `Expression`
  Returns a count of operands of this expression. In real life there are unary (count == 1), binary (count == 2) and ternary (count == 3) expressions.

  Overrides:
    `getOperandCount` in class `SimpleNode`

### getOperand

    public Object getOperand(int index)

  Description copied from class: `Expression`
  Returns a value of operand at `index`. Operand indexing starts at 0.

  Overrides:
    `getOperand` in class `SimpleNode`

### setOperand

    public void setOperand(int index,
                           Object value)

  Description copied from class: `Expression`
  Sets a value of operand at `index`. Operand indexing starts at 0.

  Overrides:
    `setOperand` in class `SimpleNode`

### setPath

    protected void setPath(Object path)

### getPath

    protected String getPath()

### evaluateEntityNode

    protected Object evaluateEntityNode(Entity entity)

  Helper method to evaluate path expression with Cayenne Entity.

### getExpressionOperator

    protected String getExpressionOperator(int index)

  Specified by:
    `getExpressionOperator` in class `SimpleNode`

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