org.jboss.dna.graph.request
Class AccessQueryRequest

java.lang.Object
  org.jboss.dna.graph.request.Request
      org.jboss.dna.graph.request.SearchRequest
          org.jboss.dna.graph.request.AccessQueryRequest

All Implemented Interfaces:

Serializable

public class AccessQueryRequest
extends SearchRequest

A Request to issue an access query a graph, where an access query is a low-level atomic query that is part of a large, planned query.

See Also:

Serialized Form

Constructor Summary

AccessQueryRequest(String workspace, SelectorName tableName, QueryResults.Columns resultColumns, List<Constraint> andedConstraints, Limit limit, Schemata schemata, Map<String,Object> variables)
Create a new request to execute the supplied query against the name workspace.

Method Summary

List<Constraint>	andedConstraints() Get the immutable list of constraints that are AND-ed together in this query.
boolean	equals(Object obj)
int	hashCode()
Limit	limit() Get the limit of the result tuples, which can specify a maximum number of rows as well as an initial offset for the first row.
QueryResults.Columns	resultColumns() Get the specification of the columns for the results.
Schemata	schemata() Get the schemata that defines the table structure and columns definitions available to this query.
SelectorName	selectorName() Get the name of the selector (or table) that is being queried.
void	setResults(List<Object[]> tuples, QueryResults.Statistics statistics) Set the results for this request.
String	toString()
Map<String,Object>	variables() The variables that are available to be substituted upon execution.
String	workspace() Get the name of the workspace in which the node exists.

Methods inherited from class org.jboss.dna.graph.request.SearchRequest

cancel, getStatistics, getTuples, isReadOnly

Methods inherited from class org.jboss.dna.graph.request.Request

freeze, getError, hasError, isCancelled, isFrozen, setError, setLatchForFreezing

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AccessQueryRequest

public AccessQueryRequest(String workspace,
                          SelectorName tableName,
                          QueryResults.Columns resultColumns,
                          List<Constraint> andedConstraints,
                          Limit limit,
                          Schemata schemata,
                          Map<String,Object> variables)

Create a new request to execute the supplied query against the name workspace.

Parameters:

workspace - the name of the workspace to be queried

tableName - the name of the selector (or table) being queried

resultColumns - the specification of the expected columns in the result tuples

andedConstraints - the list of AND-ed constraints; may be empty or null if there are no constraints

limit - the limit on the results; may be null if there is no limit

schemata - the schemata that defines the table and columns being queried; may not be null

variables - the variables that are available to be substituted upon execution; may be null if there are no variables

Throws:

IllegalArgumentException - if the query or workspace name is null

Method Detail

workspace

public String workspace()

Get the name of the workspace in which the node exists.

Returns:

the name of the workspace; never null

selectorName

public SelectorName selectorName()

Get the name of the selector (or table) that is being queried.

Returns:

the selector name; never null

resultColumns

public QueryResults.Columns resultColumns()

Get the specification of the columns for the results.

Returns:

the column specifications; never null

andedConstraints

public List<Constraint> andedConstraints()

Get the immutable list of constraints that are AND-ed together in this query. Every tuple in the results must satisfy all of these constraints.

Returns:

the AND-ed constraints; never null but possibly empty if there are no constraints

variables

public Map<String,Object> variables()

The variables that are available to be substituted upon execution.

Returns:

the variables; never null but possibly empty

schemata

public Schemata schemata()

Get the schemata that defines the table structure and columns definitions available to this query.

Returns:

the schemata; never null

limit

public Limit limit()

Get the limit of the result tuples, which can specify a maximum number of rows as well as an initial offset for the first row.

Returns:

the limit; never null but may be unlimited if there is no effective limit

setResults

public void setResults(List<Object[]> tuples,
                       QueryResults.Statistics statistics)

Set the results for this request.

Parameters:

tuples - the result values

statistics - the statistics, or null if there are none

hashCode

public int hashCode()

Overrides:

hashCode in class Object

See Also:

Object.hashCode()

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

See Also:

Object.equals(java.lang.Object)

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()