net.cnri.repository.search

Class AbstractQueryVisitorForSearch<T>

java.lang.Object

net.cnri.repository.search.AbstractQueryVisitorForSearch<T>

Type Parameters:

T - either String (for searching handles) or DigitalObject (for searching object).

All Implemented Interfaces:

QueryVisitor<CloseableIterator<T>>

Direct Known Subclasses:

AbstractQueryVisitorForSearch.SearchHandles, AbstractQueryVisitorForSearch.SearchObjects

public class AbstractQueryVisitorForSearch<T>
extends java.lang.Object
implements QueryVisitor<CloseableIterator<T>>

An effectively abstract implementation of QueryVisitor used by repository search implementations. Subclasses should implement visitAttributeQuery(net.cnri.repository.search.AttributeQuery) and/or visitElementAttributeQuery(net.cnri.repository.search.ElementAttributeQuery). This class handles BooleanQuery (by performing the boolean operations), RawQuery (by interpreting it as an attribute query specification), and MatchAllObjectsQuery (by passing to the listHandles or listObjects methods of the repository). The repository being searched, and the class of the results (either String.class or DigitalObject.class), are available as protected fields.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AbstractQueryVisitorForSearch.SearchHandles Use new AbstractQueryVisitorForSearch.SearchHandles(repo) as shorthand for new AbstractQueryVisitorForSearch<String>(repo,String.class).
static class	AbstractQueryVisitorForSearch.SearchObjects Use new AbstractQueryVisitorForSearch.SearchObjects(repo) as shorthand for new AbstractQueryVisitorForSearch<DigitalObject>(repo,DigitalObject.class).

Constructor Summary

Constructors

Constructor and Description
AbstractQueryVisitorForSearch(Repository repo, java.lang.Class<T> klass)

Method Summary

Methods

Modifier and Type	Method and Description
CloseableIterator<T>	visitAttributeQuery(AttributeQuery query)
CloseableIterator<T>	visitBooleanQuery(BooleanQuery booleanQuery)
CloseableIterator<T>	visitElementAttributeQuery(ElementAttributeQuery query)
CloseableIterator<T>	visitMatchAllObjectsQuery(MatchAllObjectsQuery query)
CloseableIterator<T>	visitRawQuery(RawQuery query)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractQueryVisitorForSearch

public AbstractQueryVisitorForSearch(Repository repo,
                             java.lang.Class<T> klass)

Method Detail

visitAttributeQuery

public CloseableIterator<T> visitAttributeQuery(AttributeQuery query)
                                         throws RepositoryException

Specified by:

visitAttributeQuery in interface QueryVisitor<CloseableIterator<T>>

Throws:

RepositoryException

visitElementAttributeQuery

public CloseableIterator<T> visitElementAttributeQuery(ElementAttributeQuery query)
                                                throws RepositoryException

Specified by:

visitElementAttributeQuery in interface QueryVisitor<CloseableIterator<T>>

Throws:

RepositoryException

visitRawQuery

public CloseableIterator<T> visitRawQuery(RawQuery query)
                                   throws RepositoryException

Specified by:

visitRawQuery in interface QueryVisitor<CloseableIterator<T>>

Throws:

RepositoryException

visitMatchAllObjectsQuery

public CloseableIterator<T> visitMatchAllObjectsQuery(MatchAllObjectsQuery query)
                                               throws RepositoryException

Specified by:

visitMatchAllObjectsQuery in interface QueryVisitor<CloseableIterator<T>>

Throws:

RepositoryException

visitBooleanQuery

public CloseableIterator<T> visitBooleanQuery(BooleanQuery booleanQuery)
                                       throws RepositoryException

Specified by:

visitBooleanQuery in interface QueryVisitor<CloseableIterator<T>>

Throws:

RepositoryException