Class DbPathExp

java.lang.Object

org.apache.cayenne.exp.Expression

org.apache.cayenne.exp.PathExp

org.apache.cayenne.exp.DbPathExp

All Implemented Interfaces:

XMLSerializable

public final class DbPathExp
extends PathExp

Path expression traversing DB relationships and attributes.

Since:

5.0

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DB_PREFIX

Fields inherited from class PathExp

path, pathAliases

Fields inherited from class Expression

operands, PRUNED_NODE

Constructor Summary

Constructors

Constructor	Description
DbPathExp(Object... operands)

Method Summary

Modifier and Type	Method	Description
void	appendAsString(Appendable out)	Appends own content as a String to the provided Appendable: the operands separated by the operator.
protected Object	evaluateEntityNode(Entity<?,?,?> entity)	Helper method to evaluate path expression with Cayenne Entity.
protected Object	evaluateNode(Object o)	Evaluates itself with object, pushing result on the stack.
Expression	shallowCopy()	Creates a copy of this expression node, without copying children.
protected Map<?,?>	toMap(Object o)

Methods inherited from class PathExp

exists, getExpandedPath, getExpressionOperator, getOperand, getOperandCount, getPath, getPathAliases, hashCode, notExists, parenthesizeAsOperand, setOperand, setPath, setPath, setPathAliases

Methods inherited from class Expression

andExp, andExp, appendOperandAsString, deepCopy, encodeAsXML, equals, evaluate, evaluateOperand, expName, filter, filterObjects, first, flattenTree, isValidParent, match, notExp, orExp, orExp, params, params, paramsArray, pruneNodeForPrunedChild, setOperands, toString, transform, transformExpression, traverse, traverse

Methods inherited from class Object

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

Field Details

DB_PREFIX

public static final String DB_PREFIX

See Also:

• Constant Field Values

Constructor Details

DbPathExp

public DbPathExp(Object... operands)

Method Details

evaluateNode

protected Object evaluateNode(Object o)
                       throws Exception

Description copied from class: Expression

Evaluates itself with object, pushing result on the stack.

Specified by:

evaluateNode in class Expression

Throws:

Exception

toMap

protected Map<?,?> toMap(Object o)

shallowCopy

public Expression shallowCopy()

Creates a copy of this expression node, without copying children.

Specified by:

shallowCopy in class Expression

appendAsString

public void appendAsString(Appendable out)
                    throws IOException

Description copied from class: Expression

Appends own content as a String to the provided Appendable: the operands separated by the operator.

Overrides:

appendAsString in class Expression

Throws:

IOException

evaluateEntityNode

protected Object evaluateEntityNode(Entity<?,?,?> entity)

Helper method to evaluate path expression with Cayenne Entity.

Overrides:

evaluateEntityNode in class PathExp