Package 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

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected String	path
protected Map<String,String>	pathAliases

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

children, id, parent

Fields inherited from class org.apache.cayenne.exp.Expression

ADD, AND, ASTERISK, BETWEEN, BITWISE_AND, BITWISE_LEFT_SHIFT, BITWISE_NOT, BITWISE_OR, BITWISE_RIGHT_SHIFT, BITWISE_XOR, CUSTOM_OP, DB_PATH, DBID_PATH, DIVIDE, ENCLOSING_OBJECT, EQUAL_TO, EXISTS, FALSE, FULL_OBJECT, FUNCTION_CALL, 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_EXISTS, NOT_IN, NOT_LIKE, NOT_LIKE_IGNORE_CASE, OBJ_PATH, OR, PRUNED_NODE, SUBQUERY, SUBTRACT, TRUE, type

Method Summary

Modifier and Type	Method	Description
protected CayenneMapEntry	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.
String	getPath()
Map<String,String>	getPathAliases()	Always returns empty map.
int	hashCode()
void	setOperand(int index, Object value)	Sets a value of operand at index.
protected void	setPath(Object path)
void	setPathAliases(Map<String,String> pathAliases)

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

appendAsEJBQL, appendAsEJBQL, appendAsEscapedString, appendAsString, appendChildrenAsEJBQL, appendScalarAsString, connectChildren, encodeScalarAsEJBQL, evaluate, evaluateChild, evaluateNode, expName, flattenTree, getEJBQLExpressionOperator, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, notExp, pruneNodeForPrunedChild, unwrapChild, wrapChild

Methods inherited from class org.apache.cayenne.exp.Expression

andExp, andExp, deepCopy, encodeAsXML, equals, filter, filterObjects, first, getType, joinExp, joinExp, match, orExp, orExp, params, params, paramsArray, setType, shallowCopy, toEJBQL, toEJBQL, toString, transform, transformExpression, traverse, traverse

Methods inherited from class java.lang.Object

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

Field Details

path

protected String path

pathAliases

protected Map<String,String> pathAliases

Method Details

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

public String getPath()

getPathAliases

public Map<String,String> getPathAliases()

Description copied from class: SimpleNode

Always returns empty map.

Overrides:

getPathAliases in class SimpleNode

Since:

3.0

setPathAliases

public void setPathAliases(Map<String,String> pathAliases)

Since:

3.0

evaluateEntityNode

protected CayenneMapEntry evaluateEntityNode(Entity entity)

Helper method to evaluate path expression with Cayenne Entity.

getExpressionOperator

protected String getExpressionOperator(int index)

Specified by:

getExpressionOperator in class SimpleNode

hashCode

public int hashCode()

Overrides:

hashCode in class Expression