org.xcmis.search.query.plan
Class QueryExecutionPlan

java.lang.Object
  org.xcmis.search.query.plan.QueryExecutionPlan

All Implemented Interfaces:

Iterator<QueryExecutionPlan>

Direct Known Subclasses:

QueryExecutionPlan.NestedExecutionPlan, QueryExecutionPlan.SourceExecutionPlan

public abstract class QueryExecutionPlan
extends Object
implements Iterator<QueryExecutionPlan>

One step from query execution plan.

Nested Class Summary

static class	QueryExecutionPlan.JoinExecutionPlan Plan what join two sources.
static class	QueryExecutionPlan.LimitExecutionPlan Execution step for limit phase.
static class	QueryExecutionPlan.NestedExecutionPlan
static class	QueryExecutionPlan.ProjectExecutionPlan Execution step for project phase.
static class	QueryExecutionPlan.SelectorExecutionPlan Plan for what accumulate information about source
static class	QueryExecutionPlan.SortExecutionPlan Execution step for sort phase.
static class	QueryExecutionPlan.SourceExecutionPlan Ancestor for Selector and Join step.
static class	QueryExecutionPlan.Type An enumeration dictating the type of plan tree nodes.
static class	QueryExecutionPlan.WhereExecutionPlan Execution step for constraint.

Constructor Summary

QueryExecutionPlan(QueryExecutionPlan.Type type)

Method Summary

void	addSelector(org.xcmis.search.model.source.SelectorName symbol) Add a selector to this plan node.
void	addSelector(org.xcmis.search.model.source.SelectorName first, org.xcmis.search.model.source.SelectorName second) Add the selectors to this execution step.
void	addSelectors(Iterable<org.xcmis.search.model.source.SelectorName> names) Add the selectors to this execution step.
QueryExecutionPlan	findPlanByType(QueryExecutionPlan.Type type) Return plan by type
protected void	getRecursiveString(StringBuilder str, int indentLevel)
Set<org.xcmis.search.model.source.SelectorName>	getSelectors() Get the selectors that are referenced by this execution step.
int	getSize()
QueryExecutionPlan.Type	getType()
boolean	hasNext()
QueryExecutionPlan	next()
void	remove()
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

QueryExecutionPlan

public QueryExecutionPlan(QueryExecutionPlan.Type type)

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<QueryExecutionPlan>

See Also:

Iterator.hasNext()

next

public QueryExecutionPlan next()

Specified by:

next in interface Iterator<QueryExecutionPlan>

See Also:

Iterator.next()

remove

public void remove()

Specified by:

remove in interface Iterator<QueryExecutionPlan>

See Also:

Iterator.remove()

addSelector

public void addSelector(org.xcmis.search.model.source.SelectorName symbol)

Add a selector to this plan node. This method does nothing if the supplied selector is null.

Parameters:

symbol - the symbol of the selector

addSelector

public void addSelector(org.xcmis.search.model.source.SelectorName first,
                        org.xcmis.search.model.source.SelectorName second)

Add the selectors to this execution step. This method does nothing for any supplied selector that is null.

Parameters:

first - the first symbol to be added

second - the second symbol to be added

addSelectors

public void addSelectors(Iterable<org.xcmis.search.model.source.SelectorName> names)

Add the selectors to this execution step. This method does nothing for any supplied selector that is null.

Parameters:

names - the symbols to be added

findPlanByType

public QueryExecutionPlan findPlanByType(QueryExecutionPlan.Type type)

Return plan by type

Parameters:

type -

Returns:

getSelectors

public Set<org.xcmis.search.model.source.SelectorName> getSelectors()

Get the selectors that are referenced by this execution step.

Returns:

the names of the selectors; never null but possibly empty

getType

public QueryExecutionPlan.Type getType()

Returns:

the type of the step

getSize

public int getSize()

Returns:

size;

getRecursiveString

protected void getRecursiveString(StringBuilder str,
                                  int indentLevel)

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()