com.sleepycat.dbxml

Class XmlIndexLookup

java.lang.Object

com.sleepycat.dbxml.XmlIndexLookup

public class XmlIndexLookup
extends java.lang.Object

The XmlIndexLookup class encapsulates the context within which an index lookup operation can be performed on an XmlContainer object. The lookup is performed using an XmlIndexLookup object, and a series of methods of that object that specify how the lookup is to be performed. Using these methods, it is possible to specify inequality lookups, range lookups, and simple value lookups, as well as the sort order of the results. By default, results are returned in the sort order of the index.

XmlIndexLookup objects are created using XmlManager.createIndexLookup(com.sleepycat.dbxml.XmlContainer, java.lang.String, java.lang.String, java.lang.String, com.sleepycat.dbxml.XmlValue, int).

XmlIndexLookup objects are not thread-safe, and may not be shared among threads while being configured. A constructed, read-only object may be shared among threads for multiple calls to execute(com.sleepycat.dbxml.XmlQueryContext).

Field Summary

Fields

Modifier and Type	Field and Description
static int	EQ Operation equal (==)
static int	GT Operation greater than (>)
static int	GTE Operation greater than or equal (>=)
static int	LT Operation less than (<)
static int	LTE Operation less than or equal (<=)
static int	NONE Empty/no operation

Constructor Summary

Constructors

Constructor and Description
XmlIndexLookup(XmlIndexLookup o) Copy constructor

Method Summary

Modifier and Type	Method and Description
void	delete() Free the native resources associated with this object
XmlResults	execute(XmlQueryContext context) Executes the index lookup operation specified by the configuration of the XmlIndexLookup object.
XmlResults	execute(XmlQueryContext context, XmlDocumentConfig config) Executes the index lookup operation specified by the configuration of the XmlIndexLookup object.
XmlResults	execute(XmlTransaction txn, XmlQueryContext context) Executes the index lookup operation specified by the configuration of the XmlIndexLookup object.
XmlResults	execute(XmlTransaction txn, XmlQueryContext context, XmlDocumentConfig config) Executes the index lookup operation specified by the configuration of the XmlIndexLookup object.
XmlContainer	getContainer() Gets the container on which the index lookup operation is to be performed.
int	getHighBoundOperation() Gets the operation to be used for the upper bound for a range index lookup operation.
XmlValue	getHighBoundValue() Gets the value to be used for the upper bound for a range index lookup operation.
java.lang.String	getIndex() Gets the indexing strategy to be used for the index lookup operation.
int	getLowBoundOperation() Gets the operation to be used for the lower bound for a range index lookup operation, or the single operation for a simple inequality lookup.
XmlValue	getLowBoundValue() Gets the value to be used for the lower bound for a range index lookup operation, or the single operation for a simple inequality lookup.
java.lang.String	getNodeName() Gets the name of the node to be used along with the indexing strategy for the index lookup operation.
java.lang.String	getNodeURI() Gets the uri of the node to be used along with the indexing strategy for the index lookup operation.
java.lang.String	getParentName() Gets the name of the parent node to be used for an edge index lookup operation.
java.lang.String	getParentURI() Gets the uri of the parent node to be used for an edge index lookup operation.
void	setContainer(XmlContainer container) Sets the container on which the index lookup operation is to be performed.
void	setHighBound(XmlValue value, int op) Sets the operation and value to be used for the upper bound for a range index lookup operation.
void	setIndex(java.lang.String index) Sets the indexing strategy to be used for the index lookup operation.
void	setLowBound(XmlValue value, int op) Sets the operation and value to be used for the index lookup operation.
void	setNode(java.lang.String uri, java.lang.String name) Sets the name of the node to be used along with the indexing strategy for the index lookup operation.
void	setParent(java.lang.String uri, java.lang.String name) Sets the name of the parent node to be used for an edge index lookup operation.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NONE

public static final int NONE

Empty/no operation

See Also:

Constant Field Values

EQ

public static final int EQ

Operation equal (==)

See Also:

Constant Field Values

GT

public static final int GT

Operation greater than (>)

See Also:

Constant Field Values

GTE

public static final int GTE

Operation greater than or equal (>=)

See Also:

Constant Field Values

LT

public static final int LT

Operation less than (<)

See Also:

Constant Field Values

LTE

public static final int LTE

Operation less than or equal (<=)

See Also:

Constant Field Values

Constructor Detail

XmlIndexLookup

public XmlIndexLookup(XmlIndexLookup o)
               throws XmlException

Copy constructor

Throws:

XmlException

Method Detail

delete

public void delete()

Free the native resources associated with this object

getIndex

public java.lang.String getIndex()
                          throws XmlException

Gets the indexing strategy to be used for the index lookup operation. Only one index may be specified, and substring indexes are not supported.

Throws:

XmlException

setIndex

public void setIndex(java.lang.String index)
              throws XmlException

Sets the indexing strategy to be used for the index lookup operation. Only one index may be specified, and substring indexes are not supported.

Parameters:

index - A string that represent the indexing strategy. See XmlIndexSpecification.addIndex(String, String, String) for a description of valid index specifications, with the exceptions that only one index can be specified, and substring indexes are not supported.

Throws:

XmlException

getNodeURI

public java.lang.String getNodeURI()
                            throws XmlException

Gets the uri of the node to be used along with the indexing strategy for the index lookup operation.

Throws:

XmlException

getNodeName

public java.lang.String getNodeName()
                             throws XmlException

Gets the name of the node to be used along with the indexing strategy for the index lookup operation.

Throws:

XmlException

setNode

public void setNode(java.lang.String uri,
                    java.lang.String name)
             throws XmlException

Sets the name of the node to be used along with the indexing strategy for the index lookup operation.

Parameters:

uri - The namespace of the node to be used. The default namespace is selected by passing an empty string for the namespace.

name - The name of the element or attribute node to be used.

Throws:

XmlException

getParentURI

public java.lang.String getParentURI()
                              throws XmlException

Gets the uri of the parent node to be used for an edge index lookup operation.

Throws:

XmlException

getParentName

public java.lang.String getParentName()
                               throws XmlException

Gets the name of the parent node to be used for an edge index lookup operation.

Throws:

XmlException

setParent

public void setParent(java.lang.String uri,
                      java.lang.String name)
               throws XmlException

Sets the name of the parent node to be used for an edge index lookup operation. If the index is not an edge index, this configuration is ignored.

Parameters:

uri - The namespace of the parent node to be used. The default namespace is selected by passing an empty string for the namespace.

name - The name of the parent element node to be used.

Throws:

XmlException

getLowBoundValue

public XmlValue getLowBoundValue()
                          throws XmlException

Gets the value to be used for the lower bound for a range index lookup operation, or the single operation for a simple inequality lookup.

Throws:

XmlException

getLowBoundOperation

public int getLowBoundOperation()
                         throws XmlException

Gets the operation to be used for the lower bound for a range index lookup operation, or the single operation for a simple inequality lookup.

Throws:

XmlException

setLowBound

public void setLowBound(XmlValue value,
                        int op)
                 throws XmlException

Sets the operation and value to be used for the index lookup operation. If the operation is a simple inequality lookup, the lower bound is used as the single value and operation for the lookup. If the operation is a range lookup, in which an upper bound is specified, the lower bound is used as the lower boundary value and operation for the lookup.

Parameters:

value - The value to be used for the lower bound. An empty value is specified using an uninitialized XmlValue object.

op - Selects the operation to be performed. Must be one of: NONE, EQ, GT, GTE, LT, LTE

Throws:

XmlException

getHighBoundValue

public XmlValue getHighBoundValue()
                           throws XmlException

Gets the value to be used for the upper bound for a range index lookup operation.

Throws:

XmlException

getHighBoundOperation

public int getHighBoundOperation()
                          throws XmlException

Gets the operation to be used for the upper bound for a range index lookup operation.

Throws:

XmlException

setHighBound

public void setHighBound(XmlValue value,
                         int op)
                  throws XmlException

Sets the operation and value to be used for the upper bound for a range index lookup operation. The high bound must be specified to indicate a range lookup.

Parameters:

value - The value to be used for the upper bound. Use of an empty value results in an inequality lookup, rather than a range lookup.

op - The operation to be used on the upper bound. Must be either XmlIndexLookup.LT or XmlIndexLookup.LTE

Throws:

XmlException

getContainer

public XmlContainer getContainer()
                          throws XmlException

Gets the container on which the index lookup operation is to be performed.

Throws:

XmlException

setContainer

public void setContainer(XmlContainer container)
                  throws XmlException

Sets the container on which the index lookup operation is to be performed.

Parameters:

container - The XmlContainer to use for the operation.

Throws:

XmlException

execute

public XmlResults execute(XmlQueryContext context)
                   throws XmlException

Executes the index lookup operation specified by the configuration of the XmlIndexLookup object.

Parameters:

context - The XmlQueryContext to use for the operation.

Throws:

XmlException

execute

public XmlResults execute(XmlTransaction txn,
                          XmlQueryContext context)
                   throws XmlException

Executes the index lookup operation specified by the configuration of the XmlIndexLookup object.

Parameters:

txn - If the operation is to be transaction-protected, the txn parameter is an XmlTransaction handle returned from XmlManager.createTransaction().

context - The XmlQueryContext to use for the operation.

Throws:

XmlException

execute

public XmlResults execute(XmlQueryContext context,
                          XmlDocumentConfig config)
                   throws XmlException

Executes the index lookup operation specified by the configuration of the XmlIndexLookup object.

Parameters:

context - The XmlQueryContext to use for the operation.

config - The XmlDocumentConfig object specifying configuration settings for this operation.

Throws:

XmlException

execute

public XmlResults execute(XmlTransaction txn,
                          XmlQueryContext context,
                          XmlDocumentConfig config)
                   throws XmlException

Executes the index lookup operation specified by the configuration of the XmlIndexLookup object.

Parameters:

txn - If the operation is to be transaction-protected, the txn parameter is an XmlTransaction handle returned from XmlManager.createTransaction().

context - The XmlQueryContext to use for the operation.

config - The XmlDocumentConfig object specifying configuration settings for this operation.

Throws:

XmlException