Package org.exolab.castor.jdo.engine

Class SimpleQueryExecutor.SimpleQueryResults

  • All Implemented Interfaces:
    java.util.Enumeration<java.lang.Object>, QueryResults
    Enclosing class:
    SimpleQueryExecutor
    public class SimpleQueryExecutor.SimpleQueryResults
extends java.lang.Object
implements QueryResults

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean absolute​(int row)
      use the jdbc 2.0 method to move to an absolute position in the resultset.
      void close()
      Closes the result set and releases all resources held by it.
      protected void finalize()  
      boolean hasMore()
      Returns true if there are any more results in the result set.
      boolean hasMoreElements()  
      java.lang.Object next()
      Returns the next result in the result set.
      java.lang.Object nextElement()  
      int size()
      Uses the underlying db's cursors to most to the last row in the result set, get the row number via getRow(), then move back to where ever the user was positioned in the resultset.

      • Methods inherited from class java.lang.Object

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

      • Methods inherited from interface java.util.Enumeration

        asIterator

    • Constructor Detail

      • SimpleQueryResults

        public SimpleQueryResults()

    • Method Detail

      • absolute

        public boolean absolute​(int row)
                 throws PersistenceException
        use the jdbc 2.0 method to move to an absolute position in the resultset.
        Specified by:
        absolute in interface QueryResults
        Parameters:
        row - The row to move to
        Returns:
        ???
        Throws:
        PersistenceException - A persistence error occured

      • size

        public int size()
         throws PersistenceException
        Uses the underlying db's cursors to most to the last row in the result set, get the row number via getRow(), then move back to where ever the user was positioned in the resultset.
        Specified by:
        size in interface QueryResults
        Returns:
        Size of the resulting result set.
        Throws:
        PersistenceException - A persistence error occured

      • hasMoreElements

        public boolean hasMoreElements()
        Specified by:
        hasMoreElements in interface java.util.Enumeration<java.lang.Object>

      • hasMore

        public boolean hasMore()
                throws PersistenceException
        Description copied from interface: QueryResults
        Returns true if there are any more results in the result set. If an error occured reading the last result, an exception will be thrown and the result set cannot be used further.
        Specified by:
        hasMore in interface QueryResults
        Returns:
        True if there are any more results in the result set
        Throws:
        PersistenceException - An error with the persistence engine

      • nextElement

        public java.lang.Object nextElement()
                             throws java.util.NoSuchElementException
        Specified by:
        nextElement in interface java.util.Enumeration<java.lang.Object>
        Throws:
        java.util.NoSuchElementException

      • next

        public java.lang.Object next()
                      throws PersistenceException,
                             java.util.NoSuchElementException
        Description copied from interface: QueryResults
        Returns the next result in the result set. If there are no more results (a previous cal to QueryResults.hasMore() returns false) this method will throw an exceptin. If an error occured reading the last result, an exception will be thrown and the result set cannot be used further.
        Specified by:
        next in interface QueryResults
        Returns:
        The next result in the result set
        Throws:
        PersistenceException - An error with the persistence engine
        java.util.NoSuchElementException - There are no more results in the result set

      • close

        public void close()
        Description copied from interface: QueryResults
        Closes the result set and releases all resources held by it.
        Specified by:
        close in interface QueryResults

      • finalize

        protected void finalize()
                 throws java.lang.Throwable
        Overrides:
        finalize in class java.lang.Object
        Throws:
        java.lang.Throwable