Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## javax.xml.xquery
Interface XQResultItem

All Superinterfaces:
  XQItem, XQItemAccessor

All Known Implementing Classes:
  SaxonXQItem

    public interface XQResultItem

extends XQItem

This interface represents an immutable item object obtained from an `XQResultSequence` using the `getItem` method.

A forward only result sequence does not support calling the getter methods multiple times on the same item. To work around this case, the `getItem` method can be used to obtain a result item and then getter methods may be called multiple times on this item.

The `XQResultItem` object is dependent on the connection, expression and the sequence from which it was created and is only valid for the duration of those objects. Thus, if any one of those objects is closed, this `XQResultItem` object will be implicitly closed, and it can no longer be used. Similarly re-executing the expression also implicitly closes the associated result sequences, which in turn implicitly closes this result item.

An XQJ driver is not required to provide finalizer methods for the connection and other objects. Hence it is strongly recommended that users call close method explicitly to free any resources. It is also recommended that they do so under a final block to ensure that the object is closed even when there are exceptions. Not closing this object implicitly or explicitly might result in serious memory leaks.

Example -

      XQPreparedExpression expr = conn.prepareExpression("for $i ..");
      XQResultSequence result = expr.executeQuery();

      // posititioned before the first item
      while (result.next())
      {
        XQResultItem item = result.getItem();
        // perform multiple gets on this item
        // get DOM
        org.w3.dom.Node node = item.getNode();
        // get SAX
        item.writeItemToSAX(saxHandler);

        item.close();  // good practice.  Item will get implicitly closed
                       // when the expression,  connection or sequence is closed.
      }

      result.close(); // explicitly close the result sequence

Method Summary
`XQConnection` | `getConnection()` Gets the XQuery connection associated with this result item

Methods inherited from interface javax.xml.xquery.XQItem
`close, isClosed`

Methods inherited from interface javax.xml.xquery.XQItemAccessor
`getAtomicValue, getBoolean, getByte, getDouble, getFloat, getInt, getItemAsStream, getItemAsString, getItemType, getLong, getNode, getNodeUri, getObject, getShort, instanceOf, writeItem, writeItem, writeItemToResult, writeItemToSAX`

Method Detail

### getConnection

    XQConnection getConnection()
                               throws XQException

  Gets the XQuery connection associated with this result item

  Returns:
    the connection associated with this result item
  Throws:
    `XQException` - if the result item is in a closed state

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

Copyright (c) 2004-2011 Saxonica Limited. All rights reserved.