org.eclipse.rdf4j.query.impl

## Class MutableTupleQueryResult

- java.lang.Object
- - org.eclipse.rdf4j.query.impl.MutableTupleQueryResult

- All Implemented Interfaces:
    AutoCloseable, Cloneable, Iterable<BindingSet>, CloseableIteration<BindingSet,QueryEvaluationException>, Iteration<BindingSet,QueryEvaluationException>, QueryResult<BindingSet>, TupleQueryResult

      public class MutableTupleQueryResult
      extends Object
      implements TupleQueryResult, Cloneable

  An implementation of the `TupleQueryResult` interface that stores the complete query result in memory. The query results in a MutableTupleQueryResult can be iterated over multiple times and can also be iterated over in reverse order.
  Author:
    Arjohn Kampman

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `MutableTupleQueryResult(Collection<String> bindingNames, BindingSet... bindingSets)`
    `MutableTupleQueryResult(Collection<String> bindingNames, Collection<? extends BindingSet> bindingSets)` Creates a query result table with the supplied binding names.
    `MutableTupleQueryResult(Collection<String> bindingNames, Iteration<? extends BindingSet,E> bindingSetIter)`
    `MutableTupleQueryResult(TupleQueryResult tqr)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `afterLast()` Moves the cursor to the end of the query result, just after the last binding set.
    `void` | `append(BindingSet bindingSet)`
    `void` | `beforeFirst()` Moves the cursor to the start of the query result, just before the first binding set.
    `void` | `clear()`
    `MutableTupleQueryResult` | `clone()`
    `void` | `close()` Closes this iteration, freeing any resources that it is holding.
    `BindingSet` | `get(int index)`
    `List<String>` | `getBindingNames()` Gets the names of the bindings, in order of projection.
    `int` | `getIndex()`
    `boolean` | `hasNext()` Returns `true` if the iteration has more elements.
    `boolean` | `hasPrevious()`
    `void` | `insert(BindingSet bindingSet)` Inserts the specified binding set into the list.
    `void` | `insert(int index, BindingSet bindingSet)`
    `BindingSet` | `next()` Returns the next element in the iteration.
    `BindingSet` | `previous()`
    `void` | `remove()` Removes from the underlying collection the last element returned by the iteration (optional operation).
    `BindingSet` | `remove(int index)`
    `void` | `set(BindingSet bindingSet)`
    `BindingSet` | `set(int index, BindingSet bindingSet)`
    `void` | `setIndex(int index)`
    `int` | `size()`

    - ### Methods inherited from class java.lang.Object

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

    - ### Methods inherited from interface org.eclipse.rdf4j.query.QueryResult

      `iterator`

    - ### Methods inherited from interface org.eclipse.rdf4j.common.iteration.Iteration

      `stream`

    - ### Methods inherited from interface java.lang.Iterable

      `forEach, spliterator`

- - ### Constructor Detail

    - #### MutableTupleQueryResult

          public MutableTupleQueryResult(Collection<String> bindingNames,
                                         BindingSet... bindingSets)

    - #### MutableTupleQueryResult

          public MutableTupleQueryResult(Collection<String> bindingNames,
                                         Collection<? extends BindingSet> bindingSets)

      Creates a query result table with the supplied binding names. The supplied list of binding names is assumed to be constant; care should be taken that the contents of this list doesn't change after supplying it to this solution.
      Parameters:
        `bindingNames` - The binding names, in order of projection.

    - #### MutableTupleQueryResult

          public MutableTupleQueryResult(Collection<String> bindingNames,
                                         Iteration<? extends BindingSet,E> bindingSetIter)
                                  throws E extends Exception

      Throws:
        `E extends Exception`

    - #### MutableTupleQueryResult

          public MutableTupleQueryResult(TupleQueryResult tqr)
                                  throws QueryEvaluationException

      Throws:
        `QueryEvaluationException`

  - ### Method Detail

    - #### getBindingNames

          public List<String> getBindingNames()

      Description copied from interface: `TupleQueryResult`
      Gets the names of the bindings, in order of projection.
      Specified by:
        `getBindingNames` in interface `TupleQueryResult`
      Returns:
        The binding names, in order of projection.

    - #### size

          public int size()

    - #### get

          public BindingSet get(int index)

    - #### getIndex

          public int getIndex()

    - #### setIndex

          public void setIndex(int index)

    - #### hasNext

          public boolean hasNext()

      Description copied from interface: `Iteration`
      Returns `true` if the iteration has more elements. (In other words, returns `true` if `Iteration.next()` would return an element rather than throwing a `NoSuchElementException`.)
      Specified by:
        `hasNext` in interface `Iteration<BindingSet,QueryEvaluationException>`
      Returns:
        `true` if the iteration has more elements.

    - #### next

          public BindingSet next()

      Description copied from interface: `Iteration`
      Returns the next element in the iteration.
      Specified by:
        `next` in interface `Iteration<BindingSet,QueryEvaluationException>`
      Returns:
        the next element in the iteration.

    - #### hasPrevious

          public boolean hasPrevious()

    - #### previous

          public BindingSet previous()

    - #### beforeFirst

          public void beforeFirst()

      Moves the cursor to the start of the query result, just before the first binding set. After calling this method, the result can be iterated over from scratch.

    - #### afterLast

          public void afterLast()

      Moves the cursor to the end of the query result, just after the last binding set.

    - #### insert

          public void insert(BindingSet bindingSet)

      Inserts the specified binding set into the list. The binding set is inserted immediately before the next element that would be returned by `next()`, if any, and after the next element that would be returned by `previous()`, if any. (If the table contains no binding sets, the new element becomes the sole element on the table.) The new element is inserted before the implicit cursor: a subsequent call to `next()` would be unaffected, and a subsequent call to `previous()` would return the new binding set.
      Parameters:
        `bindingSet` - The binding set to insert.

    - #### insert

          public void insert(int index,
                             BindingSet bindingSet)

    - #### append

          public void append(BindingSet bindingSet)

    - #### set

          public void set(BindingSet bindingSet)

    - #### set

          public BindingSet set(int index,
                                BindingSet bindingSet)

    - #### remove

          public void remove()

      Description copied from interface: `Iteration`
      Removes from the underlying collection the last element returned by the iteration (optional operation). This method can be called only once per call to next.
      Specified by:
        `remove` in interface `Iteration<BindingSet,QueryEvaluationException>`

    - #### remove

          public BindingSet remove(int index)

    - #### clear

          public void clear()

    - #### close

          public void close()

      Description copied from interface: `CloseableIteration`
      Closes this iteration, freeing any resources that it is holding. If the iteration has already been closed then invoking this method has no effect.
      Specified by:
        `close` in interface `AutoCloseable`
      Specified by:
        `close` in interface `CloseableIteration<BindingSet,QueryEvaluationException>`

    - #### clone

          public MutableTupleQueryResult clone()
                                        throws CloneNotSupportedException

      Overrides:
        `clone` in class `Object`
      Throws:
        `CloneNotSupportedException`

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