Class ASTCurrentTimestamp

java.lang.Object

org.apache.cayenne.exp.Expression

org.apache.cayenne.exp.parser.SimpleNode

org.apache.cayenne.exp.parser.EvaluatedNode

org.apache.cayenne.exp.parser.ASTFunctionCall

org.apache.cayenne.exp.parser.ASTCurrentTimestamp

All Implemented Interfaces:

Serializable, Node, XMLSerializable

public class ASTCurrentTimestamp
extends ASTFunctionCall

Since:

4.0

See Also:

• Serialized Form

Field Summary

Fields inherited from class ASTFunctionCall

functionName

Modifier and Type	Field	Description
protected String	functionName

Fields inherited from class SimpleNode

children, id, parent

Modifier and Type	Field	Description
protected Node[]	children
protected int	id
protected Node	parent

Fields inherited from class Expression

ADD, ALL, AND, ANY, ASTERISK, BETWEEN, BITWISE_AND, BITWISE_LEFT_SHIFT, BITWISE_NOT, BITWISE_OR, BITWISE_RIGHT_SHIFT, BITWISE_XOR, CASE_WHEN, CUSTOM_OP, DB_PATH, DBID_PATH, DIVIDE, ELSE, 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, SCALAR, SUBQUERY, SUBTRACT, THEN, TRUE, type, WHEN

Modifier and Type	Field	Description
static final int	ADD
static final int	ALL
static final int	AND
static final int	ANY
static final int	ASTERISK
static final int	BETWEEN
static final int	BITWISE_AND
static final int	BITWISE_LEFT_SHIFT
static final int	BITWISE_NOT
static final int	BITWISE_OR
static final int	BITWISE_RIGHT_SHIFT
static final int	BITWISE_XOR
static final int	CASE_WHEN
static final int	CUSTOM_OP
static final int	DB_PATH	Expression describes a path relative to a DbEntity.
static final int	DBID_PATH
static final int	DIVIDE
static final int	ELSE
static final int	ENCLOSING_OBJECT
static final int	EQUAL_TO
static final int	EXISTS
static final int	FALSE
static final int	FULL_OBJECT
static final int	FUNCTION_CALL
static final int	GREATER_THAN
static final int	GREATER_THAN_EQUAL_TO
static final int	IN
static final int	LESS_THAN
static final int	LESS_THAN_EQUAL_TO
static final int	LIKE
static final int	LIKE_IGNORE_CASE
static final int	LIST	Interpreted as a comma-separated list of literals.
static final int	MULTIPLY
static final int	NEGATIVE
static final int	NOT
static final int	NOT_BETWEEN
static final int	NOT_EQUAL_TO
static final int	NOT_EXISTS
static final int	NOT_IN
static final int	NOT_LIKE
static final int	NOT_LIKE_IGNORE_CASE
static final int	OBJ_PATH	Expression describes a path relative to an ObjEntity.
static final int	OR
static final Object	PRUNED_NODE	A value that a Transformer might return to indicate that a node has to be pruned from the expression during the transformation.
static final int	SCALAR
static final int	SUBQUERY
static final int	SUBTRACT
static final int	THEN
static final int	TRUE
protected int	type
static final int	WHEN

Constructor Summary

Constructors

Constructor	Description
ASTCurrentTimestamp()

Method Summary

Modifier and Type	Method	Description
protected Object	evaluateSubNode(Object o, Object[] evaluatedChildren)
protected int	getRequiredChildrenCount()
boolean	needParenthesis()
Expression	shallowCopy()	Creates a copy of this expression node, without copying children.

Methods inherited from class ASTFunctionCall

appendAsEJBQL, appendAsString, appendFunctionNameAsString, equals, getExpressionOperator, getFunctionName, getType, hashCode, nameToCamelCase, setFunctionName

Modifier and Type	Method	Description
void	appendAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId)	Stores a String representation of Expression as EJBQL using a provided PrintWriter.
void	appendAsString(Appendable out)	Appends own content as a String to the provided Appendable.
protected void	appendFunctionNameAsString(Appendable out)
boolean	equals(Object o)
protected String	getExpressionOperator(int index)
String	getFunctionName()
int	getType()	Returns a type of expression.
int	hashCode()
protected static String	nameToCamelCase(String functionName)
protected void	setFunctionName(String functionName)

Methods inherited from class EvaluatedNode

evaluateNode

Modifier and Type	Method	Description
protected Object	evaluateNode(Object o)	Evaluates itself with object, pushing result on the stack.

Methods inherited from class SimpleNode

appendAsEJBQL, appendAsEscapedString, appendChildrenAsEJBQL, appendScalarAsString, connectChildren, encodeScalarAsEJBQL, evaluate, evaluateChild, exists, expName, flattenTree, getEJBQLExpressionOperator, getOperand, getOperandCount, getPathAliases, isValidParent, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, notExists, notExp, numericToString, pruneNodeForPrunedChild, setOperand, unwrapChild, wrapChild

Modifier and Type	Method	Description
void	appendAsEJBQL(Appendable out, String rootId)	Stores a String representation of Expression as EJBQL using a provided Appendable.
protected static void	appendAsEscapedString(Appendable out, String source)	Utility method that prints a string to the provided Appendable, escaping special characters.
protected void	appendChildrenAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId)	Encodes child of this node with specified index to EJBQL
protected static void	appendScalarAsString(Appendable out, Object scalar, char quoteChar)	Utility method that encodes an object that is not an expression Node to String.
protected void	connectChildren()	Sets the parent to this for all children.
protected static void	encodeScalarAsEJBQL(List<Object> parameterAccumulator, Appendable out, Object scalar)	This is a utility method that can represent the supplied scalar as either an EJBQL literal into the supplied PrintWriter or is able to add the scalar to the parameters and to instead write a positional parameter to the EJBQL written to the PrintWriter.
Object	evaluate(Object o)	Calculates expression value with object as a context for path expressions.
protected Object	evaluateChild(int index, Object o)
Expression	exists()	Returns expression that will be dynamically resolved to proper subqueries based on a relationships used (if no relationships are present in the original expression no subqueries will be used).
String	expName()	Implemented for backwards compatibility with exp package.
protected void	flattenTree()	Flattens the tree under this node by eliminating any children that are of the same class as this node and copying their children to this node.
protected String	getEJBQLExpressionOperator(int index)	Returns operator for EJBQL statements, which can differ for Cayenne expression operator
Object	getOperand(int index)	Returns a value of operand at index.
int	getOperandCount()	Returns a count of operands of this expression.
Map<String,String>	getPathAliases()	Always returns empty map.
protected boolean	isValidParent(Node n)	Additional parent check that we can't handle properly in the grammar By default it just returns true.
void	jjtAddChild(Node n, int i)	This method tells the node to add its argument to the node's list of children.
void	jjtClose()	Called after all the child nodes have been added.
Node	jjtGetChild(int i)	This method returns a child node.
final int	jjtGetNumChildren()	Return the number of children the node has.
Node	jjtGetParent()
void	jjtOpen()	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.
Expression	notExists()	Returns expression that will be dynamically resolved to proper subqueries based on a relationships used (if no relationships are present in the original expression no subqueries will be used).
Expression	notExp()	Returns a logical NOT of current expression.
protected static String	numericToString(Number number)
protected boolean	pruneNodeForPrunedChild(Object prunedChild)	Returns true if this node should be pruned from expression tree in the event a child is removed.
void	setOperand(int index, Object value)	Sets a value of operand at index.
protected Object	unwrapChild(Node child)
protected Node	wrapChild(Object child)

Methods inherited from class Expression

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

Modifier and Type	Method	Description
Expression	andExp(Expression exp)	Chains this expression with another expression using "and".
Expression	andExp(Expression exp, Expression... expressions)	Chains this expression with other expressions using "and".
Expression	deepCopy()	Clones this expression.
void	encodeAsXML(XMLEncoder encoder, ConfigurationNodeVisitor delegate)	Encodes itself, wrapping the string into XML CDATA section.
<T> Collection<?>	filter(Collection<T> source, Collection<T> target)	Adds objects matching this expression from the source collection to the target collection.
<T> List<T>	filterObjects(Collection<T> objects)	Returns a list of objects that match the expression.
<T> T	first(List<T> objects)	Returns the first object in the list that matches the expression.
Expression	joinExp(int type, Expression exp)	Creates a new expression that joins this object with another expression, using specified join type.
Expression	joinExp(int type, Expression exp, Expression... expressions)	Creates a new expression that joins this object with other expressions, using specified join type.
boolean	match(Object o)	Calculates expression boolean value with object as a context for path expressions.
Expression	orExp(Expression exp)	Chains this expression with another expression using "or".
Expression	orExp(Expression exp, Expression... expressions)	Chains this expression with other expressions using "or".
Expression	params(Map<String,?> parameters)	Creates and returns a new Expression instance based on this expression, but with named parameters substituted with provided values.
Expression	params(Map<String,?> parameters, boolean pruneMissing)	Creates and returns a new Expression instance based on this expression, but with named parameters substituted with provided values.If any subexpressions containing parameters not matching the "name" argument are found, the behavior depends on "pruneMissing" argument.
Expression	paramsArray(Object... parameters)	Creates and returns a new Expression instance based on this expression, but with parameters substituted with provided values.
void	setType(int type)
String	toEJBQL(String rootId)	Produces an EJBQL string that represents this expression.
String	toEJBQL(List<Object> parameterAccumulator, String rootId)	Produces an EJBQL string that represents this expression.
String	toString()
Expression	transform(Function<Object,Object> transformer)	Creates a transformed copy of this expression, applying transformation provided by Transformer to all its nodes.
protected Object	transformExpression(Function<Object,Object> transformer)	A recursive method called from "transform" to do the actual transformation.
protected void	traverse(Expression parentExp, TraversalHandler visitor)	Traverses itself and child expressions, notifying visitor via callback methods as it goes.
void	traverse(TraversalHandler visitor)	Traverses itself and child expressions, notifying visitor via callback methods as it goes.

Methods inherited from class Object

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

Constructor Details

ASTCurrentTimestamp

public ASTCurrentTimestamp()

Method Details

needParenthesis

public boolean needParenthesis()

Overrides:

needParenthesis in class ASTFunctionCall

getRequiredChildrenCount

protected int getRequiredChildrenCount()

Specified by:

getRequiredChildrenCount in class EvaluatedNode

evaluateSubNode

protected Object evaluateSubNode(Object o,
 Object[] evaluatedChildren)
                          throws Exception

Specified by:

evaluateSubNode in class EvaluatedNode

Throws:

Exception

shallowCopy

public Expression shallowCopy()

Description copied from class: Expression

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

Specified by:

shallowCopy in class Expression