Package org.apache.jena.arq.querybuilder.handlers

Class WhereHandler

java.lang.Object
org.apache.jena.arq.querybuilder.handlers.WhereHandler
All Implemented Interfaces:
Handler
public class WhereHandler extends Object implements Handler
The where handler. Generally handles GroupGraphPattern.
See Also:

  • Constructor Details

    • WhereHandler

      public WhereHandler(Query query)
      Constructor.
      Parameters:
      query - The query to manipulate.

    • WhereHandler

      public WhereHandler()
      Creates a where handler with a new query.

  • Method Details

    • getQueryPattern

      public Element getQueryPattern()
      Get the query pattern from this where handler.
      Returns:
      the query pattern

    • getQuery

      public Query getQuery()
      Returns:
      The query this where handler is using.

    • addAll

      public void addAll(WhereHandler whereHandler)
      Add all where attributes from the Where Handler argument.
      Parameters:
      whereHandler - The Where Handler to copy from.

    • getElement

      public Element getElement()
      Get the base element from the where clause. If the clause does not contain an element return the element group, otherwise return the enclosed element.
      Returns:
      the base element.

    • getClause

      public ElementGroup getClause()
      Get the element group for the clause. if The element group is not set, create and set it. Public for ExprFactory use.
      Returns:
      The element group.

    • addWhere

      public void addWhere(TriplePath t) throws IllegalArgumentException
      Add the triple path to the where clause
      Parameters:
      t - The triple path to add.
      Throws:
      IllegalArgumentException - If the triple path is not a valid triple path for a where clause.

    • addWhere

      public void addWhere(Collection<TriplePath> t) throws IllegalArgumentException
      Add the triple path to the where clause
      Parameters:
      t - The triple path to add.
      Throws:
      IllegalArgumentException - If the triple path is not a valid triple path for a where clause.

    • addWhere

      public void addWhere(ValuesHandler values) throws IllegalArgumentException
      Add the triple path to the where clause
      Parameters:
      values - The values to add to this where clause.
      Throws:
      IllegalArgumentException - If the triple path is not a valid triple path for a where clause.

    • addOptional

      public void addOptional(TriplePath t) throws IllegalArgumentException
      Add an optional triple to the where clause
      Parameters:
      t - The triple path to add.
      Throws:
      IllegalArgumentException - If the triple is not a valid triple for a where clause.

    • addOptional

      public void addOptional(Collection<TriplePath> t) throws IllegalArgumentException
      Add an optional triple to the where clause
      Parameters:
      t - The triple path to add.
      Throws:
      IllegalArgumentException - If the triple is not a valid triple for a where clause.

    • addOptional

      public void addOptional(WhereHandler whereHandler)
      Add the contents of a where handler as an optional statement.
      Parameters:
      whereHandler - The where handler to use as the optional statement.

    • addFilter

      public void addFilter(String expression)
      Add an expression string as a filter.
      Parameters:
      expression - The expression string to add.

    • addFilter

      public void addFilter(Expr expr)
      add an expression as a filter.
      Parameters:
      expr - The expression to add.

    • addSubQuery

      public void addSubQuery(AbstractQueryBuilder<?> subQuery)
      Add a subquery to the where clause.
      Parameters:
      subQuery - The sub query to add.

    • makeSubQuery

      public ElementSubQuery makeSubQuery(AbstractQueryBuilder<?> subQuery)
      Convert a subquery into a subquery element.
      Parameters:
      subQuery - The sub query to convert
      Returns:
      THe converted element.

    • addUnion

      public void addUnion(AbstractQueryBuilder<?> subQuery)
      Add a union to the where clause.
      Parameters:
      subQuery - The subquery to add as the union.

    • addGraph

      public void addGraph(Node graph, WhereHandler subQuery)
      Add a graph to the where clause.
      Parameters:
      graph - The name of the graph.
      subQuery - The where handler that defines the graph.

    • addGraph

      public void addGraph(Node graph, TriplePath subQuery)
      Add a graph to the where clause. Short hand for graph { s, p, o }
      Parameters:
      graph - The name of the graph.
      subQuery - A triple path to add to the graph.

    • addGraph

      public void addGraph(Node graph, Collection<TriplePath> subQuery)
      Add a graph to the where clause. Short hand for graph { s, p, o }
      Parameters:
      graph - The name of the graph.
      subQuery - A triple path to add to the graph.

    • addBind

      public void addBind(Expr expr, Var var)
      Add a binding to the where clause.
      Parameters:
      expr - The expression to bind.
      var - The variable to bind it to.

    • addBind

      public void addBind(String expression, Var var)
      Add a binding to the where clause.
      Parameters:
      expression - The expression to bind.
      var - The variable to bind it to.

    • setVars

      public void setVars(Map<Var,Node> values)
      Description copied from interface: Handler
      Set the values for variables managed by the handler implementation. This method is called by the builder to set values handled by this Handler implementation.
      Specified by:
      setVars in interface Handler
      Parameters:
      values - The map of variable to node value.

    • build

      public void build()
      Description copied from interface: Handler
      Called by the build process for this handler to perform any adjustments to the query before the build completes. The adjustments are made after setVars() has been called.
      Specified by:
      build in interface Handler

    • list

      @Deprecated(since="5.0.0") public Node list(Object... objs)
      Deprecated.
      use {code Converters.makeCollection(List.of(Object...))}.
      Create a list node from a list of objects as per RDF Collections. http://www.w3.org/TR/2013/REC-sparql11-query-20130321/#collections
      Parameters:
      objs - the list of objects for the list.
      Returns:
      the first blank node in the list.

    • addMinus

      public void addMinus(AbstractQueryBuilder<?> qb)
      Add a minus operation to the where clause. The prolog will be updated with the prefixes from the abstract query builder.
      Parameters:
      qb - the abstract builder that defines the data to subtract.

    • addValueVar

      public void addValueVar(PrefixMapping prefixMapping, Object var)

    • addValueVar

      public void addValueVar(PrefixMapping prefixMapping, Object var, Object... objects)

    • addValueVars

      public <K extends Collection<?>> void addValueVars(PrefixMapping prefixMapping, Map<?,K> dataTable)

    • addValueRow

      public void addValueRow(PrefixMapping prefixMapping, Object... values)

    • addValueRow

      public void addValueRow(PrefixMapping prefixMapping, Collection<?> values)

    • getValuesVars

      public List<Var> getValuesVars()

    • getValuesMap

      public Map<Var,List<Node>> getValuesMap()

    • clearValues

      public void clearValues()