Package org.apache.jackrabbit.oak.query.ast

Class ComparisonImpl

java.lang.Object

org.apache.jackrabbit.oak.query.ast.ConstraintImpl

org.apache.jackrabbit.oak.query.ast.ComparisonImpl

public class ComparisonImpl
extends ConstraintImpl

A comparison operation (including "like").

Field Summary

Fields

Modifier and Type	Field	Description
protected QueryImpl	query

Constructor Summary

Constructors

Constructor	Description
ComparisonImpl(DynamicOperandImpl operand1, Operator operator, StaticOperandImpl operand2)

Method Summary

Modifier and Type	Method	Description
protected PropertyValue	convertValueToType(PropertyValue v, PropertyValue targetType)
org.apache.jackrabbit.oak.query.ast.AstElement	copyOf()
boolean	evaluate()	Evaluate the result using the currently set values.
protected String	getLocalPath(String path)	Calculate the session local path (the path excluding the workspace name) if possible.
DynamicOperandImpl	getOperand1()
StaticOperandImpl	getOperand2()
Operator	getOperator()
Set<PropertyExistenceImpl>	getPropertyExistenceConditions()	Get the set of property existence conditions that can be derived for this condition.
Set<SelectorImpl>	getSelectors()	Get the set of selectors for the given condition.
protected String	normalizePath(String path)	Validate and normalize the path.
protected String	normalizePropertyName(String propertyName)	Normalize the property name (including namespace remapping).
protected String	protect(Object expression)
protected static String	quote(String pathOrName)
protected static String	quoteJson(String string)
void	restrict(FilterImpl f)	Apply the condition to the filter, further restricting the filter if possible.
void	restrictPushDown(SelectorImpl s)	Push as much of the condition down to this selector, further restricting the selector condition if possible.
void	setQuery(QueryImpl query)
String	toString()

Methods inherited from class org.apache.jackrabbit.oak.query.ast.ConstraintImpl

containsUnfilteredFullTextCondition, convertToUnion, equals, evaluateStop, getFullTextConstraint, hashCode, requiresFullTextIndex, simplify

Methods inherited from class java.lang.Object

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

Field Detail

query

protected QueryImpl query

Constructor Detail

ComparisonImpl

public ComparisonImpl(DynamicOperandImpl operand1,
                      Operator operator,
                      StaticOperandImpl operand2)

Method Detail

getOperand1

public DynamicOperandImpl getOperand1()

getOperator

public Operator getOperator()

getOperand2

public StaticOperandImpl getOperand2()

getPropertyExistenceConditions

public Set<PropertyExistenceImpl> getPropertyExistenceConditions()

Description copied from class: ConstraintImpl

Get the set of property existence conditions that can be derived for this condition. For example, for the condition "x=1 or x=2", the property existence condition is "x is not null". For the condition "x=1 or y=2", there is no such condition. For the condition "x=1 and y=1", there are two (x is not null, and y is not null).

Specified by:

getPropertyExistenceConditions in class ConstraintImpl

Returns:

the common property existence condition (possibly empty)

getSelectors

public Set<SelectorImpl> getSelectors()

Description copied from class: ConstraintImpl

Get the set of selectors for the given condition.

Specified by:

getSelectors in class ConstraintImpl

Returns:

the set of selectors (possibly empty)

evaluate

public boolean evaluate()

Description copied from class: ConstraintImpl

Evaluate the result using the currently set values.

Specified by:

evaluate in class ConstraintImpl

Returns:

true if the constraint matches

toString

public String toString()

Overrides:

toString in class Object

restrict

public void restrict(FilterImpl f)

Description copied from class: ConstraintImpl

Apply the condition to the filter, further restricting the filter if possible. This may also verify the data types are compatible, and that paths are valid.

Specified by:

restrict in class ConstraintImpl

Parameters:

f - the filter

restrictPushDown

public void restrictPushDown(SelectorImpl s)

Description copied from class: ConstraintImpl

Push as much of the condition down to this selector, further restricting the selector condition if possible. This is important for a join: for example, the query "select * from a inner join b on a.x=b.x where a.y=1 and b.y=1", the condition "a.y=1" can be pushed down to "a", and the condition "b.y=1" can be pushed down to "b". That means it is possible to use an index in this case.

Specified by:

restrictPushDown in class ConstraintImpl

Parameters:

s - the selector

copyOf

public org.apache.jackrabbit.oak.query.ast.AstElement copyOf()

Returns:

a clone of self. Default implementation in AstElement returns same reference to this.

protect

protected String protect(Object expression)

quote

protected static String quote(String pathOrName)

quoteJson

protected static String quoteJson(String string)

setQuery

public void setQuery(QueryImpl query)

normalizePropertyName

protected String normalizePropertyName(String propertyName)

Normalize the property name (including namespace remapping). Asterisks are kept.

Parameters:

propertyName - the property name to normalize

Returns:

the normalized (oak-) property name

normalizePath

protected String normalizePath(String path)

Validate and normalize the path.

Parameters:

path - the path to validate

Returns:

the validated and normalized path

convertValueToType

protected PropertyValue convertValueToType(PropertyValue v,
                                           PropertyValue targetType)

getLocalPath

protected String getLocalPath(String path)

Calculate the session local path (the path excluding the workspace name) if possible.

Parameters:

path - the absolute path

Returns:

the session local path, or null if not within this workspace