org.apache.slide.search.basic
Class BasicExpressionFactory

java.lang.Object
  org.apache.slide.search.basic.BasicExpressionFactory

All Implemented Interfaces:

IBasicExpressionFactory

public class BasicExpressionFactory

extends java.lang.Object

implements IBasicExpressionFactory

BasicExpressionFactory.java

Field Summary

protected PropertyProvider	propertyProvider The PropertyProvider to use.
protected IBasicQuery	query The IBasicQuery to use.
protected ComparableResourcesPool	requestedResourcePool The pool of resources in the given scope.

Fields inherited from interface org.apache.slide.search.basic.IBasicExpressionFactory

BASIC_EXPRESSION_FACTORY_CLASS

Constructor Summary

BasicExpressionFactory()
Creates a BasicExpressionFactory.

BasicExpressionFactory(ComparableResourcesPool requestedResourcePool)
Creates a BasicExpressionFactory with the given requestedResourcePool to use.

Method Summary

IBasicExpression	createExpression(org.jdom.Element element) Creates a (non-merge) expression (compare...) for the given Element.
IBasicExpression	createMergeExpression(java.lang.String name, java.lang.String namespace, java.util.Collection expressionsToMerge) Creates a MergeExpression for the given element (AND, OR).
PropertyProvider	getPropertyProvider() Returns the PropertyProvider to use (set in method init()).
IBasicQuery	getQuery() Returns the IBasicQuery to use (set in method init()).
protected ComparableResourcesPool	getRequestedResourcePool() Returns the RequestedResourcesPool to use for the query.
void	init(IBasicQuery query, PropertyProvider propertyProvider) Initializes the factory.

Methods inherited from class java.lang.Object

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

Field Detail

requestedResourcePool

protected ComparableResourcesPool requestedResourcePool

The pool of resources in the given scope.

query

protected IBasicQuery query

The IBasicQuery to use.

propertyProvider

protected PropertyProvider propertyProvider

The PropertyProvider to use.

Constructor Detail

BasicExpressionFactory

public BasicExpressionFactory()

Creates a BasicExpressionFactory.

BasicExpressionFactory

public BasicExpressionFactory(ComparableResourcesPool requestedResourcePool)

Creates a BasicExpressionFactory with the given requestedResourcePool to use.

Parameters:

requestedResourcePool - the RequestedResourcePool to use.

Method Detail

init

public void init(IBasicQuery query,
                 PropertyProvider propertyProvider)
          throws BadQueryException

Initializes the factory. Is called exactly once and before any call to crateExpression ()

Specified by:

init in interface IBasicExpressionFactory

Parameters:

query - the IBasicQuery.

propertyProvider - the PropertyProvider to use (may be null).

Throws:

BadQueryException

getQuery

public IBasicQuery getQuery()

Returns the IBasicQuery to use (set in method init()).

Specified by:

getQuery in interface IBasicExpressionFactory

Returns:

the IBasicQuery to use.

getPropertyProvider

public PropertyProvider getPropertyProvider()

Returns the PropertyProvider to use (set in method init()).

Specified by:

getPropertyProvider in interface IBasicExpressionFactory

Returns:

the PropertyProvider to use.

createMergeExpression

public IBasicExpression createMergeExpression(java.lang.String name,
                                              java.lang.String namespace,
                                              java.util.Collection expressionsToMerge)
                                       throws BadQueryException

Creates a MergeExpression for the given element (AND, OR). The given children are the expressions to merge.

Specified by:

createMergeExpression in interface IBasicExpressionFactory

Parameters:

name - the name of the Element describing the merge expression.

namespace - the namespace of the Element describing the merge expression.

expressionsToMerge - the expressions to merge.

Returns:

an IBasicExpression

Throws:

BadQueryException

createExpression

public IBasicExpression createExpression(org.jdom.Element element)
                                  throws BadQueryException

Creates a (non-merge) expression (compare...) for the given Element.

Specified by:

createExpression in interface IBasicExpressionFactory

Parameters:

element - an Element describing the expression.

Returns:

an IBasicExpression

Throws:

BadQueryException

getRequestedResourcePool

protected ComparableResourcesPool getRequestedResourcePool()
                                                    throws BadQueryException

Returns the RequestedResourcesPool to use for the query. The pool will be created lazily, means the first time it is requested. If creation fails, a SearchException is thrown.

Returns:

the RequestedResourcesPool to use for the query.

Throws:

SerachException - if creation of the pool failed.

BadQueryException