com.yahoo.document.fieldpathupdate

Class AssignFieldPathUpdate

java.lang.Object

com.yahoo.document.fieldpathupdate.FieldPathUpdate

com.yahoo.document.fieldpathupdate.AssignFieldPathUpdate

public class AssignFieldPathUpdate
extends FieldPathUpdate

Author:

Thomas Gundersen

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) class	AssignFieldPathUpdate.MathAssignIteratorHandler
(package private) class	AssignFieldPathUpdate.SimpleAssignIteratorHandler

Nested classes/interfaces inherited from class com.yahoo.document.fieldpathupdate.FieldPathUpdate

FieldPathUpdate.Type

Field Summary

Fields

Modifier and Type	Field and Description
static int	ARITHMETIC_EXPRESSION
static int	CREATE_MISSING_PATH
(package private) boolean	createMissingPath
(package private) String	expression
(package private) FieldValue	fieldValue
static int	REMOVE_IF_ZERO
(package private) boolean	removeIfZero

Constructor Summary

Constructors

Constructor and Description
AssignFieldPathUpdate(DocumentType type, DocumentUpdateReader reader) Creates an assign update from a serialized object.
AssignFieldPathUpdate(DocumentType type, String fieldPath)
AssignFieldPathUpdate(DocumentType type, String fieldPath, FieldValue newValue)
AssignFieldPathUpdate(DocumentType type, String fieldPath, String whereClause, FieldValue newValue) Creates an assignment update that overwrites the old value with the given new value.
AssignFieldPathUpdate(DocumentType type, String fieldPath, String whereClause, String expression) Creates an assign statement based on a mathematical expression.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
boolean	getCreateMissingPath()
String	getExpression()
FieldValue	getFieldValue()
(package private) FieldPathIteratorHandler	getIteratorHandler(Document doc)
FieldValue	getNewValue()
boolean	getRemoveIfZero()
int	hashCode()
boolean	isArithmetic()
void	serialize(VespaDocumentSerializerHead data)
void	setCreateMissingPath(boolean createMissingPath) If set to true, and any part of the field path specified does not exist (except for array indexes), we create the path as necessary.
void	setExpression(String value) Turns this assignment into a mathematical expression assignment.
void	setNewValue(FieldValue value) Turns this assignment into a literal one.
void	setRemoveIfZero(boolean removeIfZero) If set to true, and the new value assigned evaluates to a numeric value of 0, removes the value instead of setting it.
String	toString()

Methods inherited from class com.yahoo.document.fieldpathupdate.FieldPathUpdate

applyTo, create, getDocumentType, getFieldPath, getOriginalFieldPath, getOriginalWhereClause, getUpdateType, getWhereClause, setFieldPath, setWhereClause

Methods inherited from class java.lang.Object

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

Field Detail

fieldValue

FieldValue fieldValue

expression

String expression

createMissingPath

boolean createMissingPath

removeIfZero

boolean removeIfZero

ARITHMETIC_EXPRESSION

public static final int ARITHMETIC_EXPRESSION

See Also:

Constant Field Values

REMOVE_IF_ZERO

public static final int REMOVE_IF_ZERO

See Also:

Constant Field Values

CREATE_MISSING_PATH

public static final int CREATE_MISSING_PATH

See Also:

Constant Field Values

Constructor Detail

AssignFieldPathUpdate

public AssignFieldPathUpdate(DocumentType type,
                             String fieldPath,
                             String whereClause,
                             FieldValue newValue)

Creates an assignment update that overwrites the old value with the given new value.

Parameters:

type - The document type the assignment works on.

fieldPath - The field path of the field to be overwritten.

whereClause - A document selection string that selects documents and variables to be updated.

newValue - The new value of the assignment.

AssignFieldPathUpdate

public AssignFieldPathUpdate(DocumentType type,
                             String fieldPath,
                             FieldValue newValue)

AssignFieldPathUpdate

public AssignFieldPathUpdate(DocumentType type,
                             String fieldPath,
                             String whereClause,
                             String expression)

Creates an assign statement based on a mathematical expression.

Parameters:

type - The document type the assignment works on.

fieldPath - The field path of the field to be overwritten.

whereClause - A document selection string that selects documents and variables to be updated.

expression - The mathematical expression to apply. Use $value to signify the previous value of the field.

AssignFieldPathUpdate

public AssignFieldPathUpdate(DocumentType type,
                             DocumentUpdateReader reader)

Creates an assign update from a serialized object.

Parameters:

type - The document type the assignment will work on.

reader - A reader that can deserialize something into this object.

AssignFieldPathUpdate

public AssignFieldPathUpdate(DocumentType type,
                             String fieldPath)

Method Detail

setNewValue

public void setNewValue(FieldValue value)

Turns this assignment into a literal one.

Parameters:

value - The new value to assign to the document.

getNewValue

public FieldValue getNewValue()

Returns:

Returns the value to assign, or null if this is a mathematical expression.

setExpression

public void setExpression(String value)

Turns this assignment into a mathematical expression assignment.

Parameters:

value - The expression to use for assignment.

getExpression

public String getExpression()

Returns:

Returns the arithmetic expression to assign, or null if this is not a mathematical expression.

setRemoveIfZero

public void setRemoveIfZero(boolean removeIfZero)

If set to true, and the new value assigned evaluates to a numeric value of 0, removes the value instead of setting it. Default is false.

setCreateMissingPath

public void setCreateMissingPath(boolean createMissingPath)

If set to true, and any part of the field path specified does not exist (except for array indexes), we create the path as necessary. Default is true.

isArithmetic

public boolean isArithmetic()

Returns:

Returns true if this assignment is an arithmetic operation.

getIteratorHandler

FieldPathIteratorHandler getIteratorHandler(Document doc)

Specified by:

getIteratorHandler in class FieldPathUpdate

serialize

public void serialize(VespaDocumentSerializerHead data)

Overrides:

serialize in class FieldPathUpdate

equals

public boolean equals(Object o)

Overrides:

equals in class FieldPathUpdate

hashCode

public int hashCode()

Overrides:

hashCode in class FieldPathUpdate

toString

public String toString()

Overrides:

toString in class FieldPathUpdate

getCreateMissingPath

public boolean getCreateMissingPath()

getRemoveIfZero

public boolean getRemoveIfZero()

getFieldValue

public FieldValue getFieldValue()