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:

java.io.Serializable, Node, XMLSerializable

Direct Known Subclasses:

ASTDbPath, ASTObjPath

public abstract class ASTPath
extends SimpleNode

Generic path expression.

Since:

1.1

Author:

Andrei Adamchik

See Also:

Serialized Form

Field Summary

protected java.lang.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, ALL, AND, ANY, AVG, BETWEEN, COUNT, DB_PATH, DIVIDE, EQUAL_TO, EXISTS, GREATER_THAN, GREATER_THAN_EQUAL_TO, IN, LESS_THAN, LESS_THAN_EQUAL_TO, LIKE, LIKE_IGNORE_CASE, LIST, MAX, MIN, MULTIPLY, NEGATIVE, NOT, NOT_BETWEEN, NOT_EQUAL_TO, NOT_IN, NOT_LIKE, NOT_LIKE_IGNORE_CASE, OBJ_PATH, OR, POSITIVE, PRUNED_NODE, RAW_SQL, SOME, SUBQUERY, SUBTRACT, SUM, type

Method Summary

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

Methods inherited from class org.apache.cayenne.exp.parser.SimpleNode

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 java.lang.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 java.lang.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,
                       java.lang.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(java.lang.Object path)

getPath

protected java.lang.String getPath()

evaluateEntityNode

protected java.lang.Object evaluateEntityNode(Entity entity)

Helper method to evaluate path expression with Cayenne Entity.

getExpressionOperator

protected java.lang.String getExpressionOperator(int index)

Specified by:

getExpressionOperator in class SimpleNode