com.ibm.websphere.ejbquery
Class QueryLocalIterator
- java.lang.Object
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- com.ibm.websphere.ejbquery.QueryLocalIterator
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- All Implemented Interfaces:
- java.io.Serializable, java.util.Iterator
public class QueryLocalIterator extends java.lang.Object implements java.util.Iterator, java.io.Serializable
Iterator over a collection of IQueryTuple objects. This iterator is returned by the local interface of the Websphere dynamic ejb query service. The result collection belonging to this iterator may be demand driven depending on the nature of the ejb query statement. In general an ejb query will be demand driven unless it requires an in memory ordering, grouping or predicate evaluation. Any SQL resources belonging to this iterator will be freed when the iteration is completed, at garbage collection of the iterator or by calling the close( ) method.- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor and Description QueryLocalIterator(com.ibm.ObjectQuery.eval.DataEnumerator denum, java.util.ArrayList headings)
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Method Summary
Methods Modifier and Type Method and Description void
close()
closes and frees the SQL cursorjava.lang.Exception
getException()
used to obtain exception information about sql errors or ejb query execution errors.java.lang.Object
getFieldClassName(int field)
futurejava.lang.String
getFieldName(int field)
descriptive name for the nth field of the result set. n=1 is the first field.int
getFieldsCount()
number of fields in the result set.java.lang.Object
getFieldType(int field)
futureboolean
hasNext()
returns TRUE if the iteration has more elementsjava.lang.Object
next()
returns the next IQueryTuple in the iterationvoid
remove()
no operation
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Constructor Detail
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QueryLocalIterator
public QueryLocalIterator(com.ibm.ObjectQuery.eval.DataEnumerator denum, java.util.ArrayList headings)
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Method Detail
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next
public java.lang.Object next()
returns the next IQueryTuple in the iteration- Specified by:
next
in interfacejava.util.Iterator
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hasNext
public boolean hasNext()
returns TRUE if the iteration has more elements- Specified by:
hasNext
in interfacejava.util.Iterator
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remove
public void remove()
no operation- Specified by:
remove
in interfacejava.util.Iterator
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close
public void close() throws QueryException
closes and frees the SQL cursor- Throws:
QueryException
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getException
public java.lang.Exception getException()
used to obtain exception information about sql errors or ejb query execution errors.
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getFieldType
public java.lang.Object getFieldType(int field)
future
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getFieldClassName
public java.lang.Object getFieldClassName(int field)
future
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getFieldName
public java.lang.String getFieldName(int field)
descriptive name for the nth field of the result set. n=1 is the first field.
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getFieldsCount
public int getFieldsCount()
number of fields in the result set.
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