Package org.intermine.objectstore.query

Class SingletonResults

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractList<java.lang.Object>

org.intermine.objectstore.query.Results

org.intermine.objectstore.query.SingletonResults

All Implemented Interfaces:

java.lang.Iterable<java.lang.Object>, java.util.Collection<java.lang.Object>, java.util.List<java.lang.Object>, java.util.Set<java.lang.Object>, Lazy, LazyCollection<java.lang.Object>

public class SingletonResults
extends Results
implements java.util.Set<java.lang.Object>, java.util.Collection<java.lang.Object>

This class is equivalent to a Result object with ResultRows consisting only of single items

Author:

Mark Woodbridge, Richard Smith, Matthew Wakeling

Field Summary

Fields inherited from class org.intermine.objectstore.query.Results

explain, immutable, lastGet, optimise, prefetch, resultsBatches, sequential

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor	Description
SingletonResults(Query q, ObjectStore os, java.util.Map<java.lang.Object,java.lang.Integer> sequence)	Constructor for a SingletonResults object
SingletonResults(ResultsBatches batches, boolean optimise, boolean explain, boolean prefetch)	Constructor for a SingletonResults object, given a ResultsBatches object.

Method Summary

Modifier and Type	Method	Description
java.util.List<java.lang.Object>	range(int start, int end)	Returns a range of rows of results.
java.util.Spliterator<java.lang.Object>	spliterator()

Methods inherited from class org.intermine.objectstore.query.Results

asList, equals, get, getBatchNoForRow, getBatchSize, getInfo, getObjectStore, getQuery, getResultsBatches, getSequence, hashCode, isEmpty, isSingleBatch, iterator, iteratorFrom, setBatchSize, setImmutable, setNoExplain, setNoOptimise, setNoPrefetch, size, subList, toString

Methods inherited from class java.util.AbstractList

add, add, addAll, clear, indexOf, lastIndexOf, listIterator, listIterator, remove, removeRange, set

Methods inherited from class java.util.AbstractCollection

addAll, contains, containsAll, remove, removeAll, retainAll, toArray, toArray

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.List

addAll, contains, containsAll, remove, removeAll, replaceAll, retainAll, sort, toArray, toArray

Methods inherited from interface java.util.Set

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray

Constructor Detail

SingletonResults

public SingletonResults(Query q,
                        ObjectStore os,
                        java.util.Map<java.lang.Object,java.lang.Integer> sequence)

Constructor for a SingletonResults object

Parameters:

q - the Query that produces this Results

os - the ObjectStore that can be used to get results rows from

sequence - an object representing the state of the ObjectStore, which should be quoted back to the ObjectStore when requests are made

Throws:

java.lang.IllegalArgumentException - if q does not return a single column

SingletonResults

public SingletonResults(ResultsBatches batches,
                        boolean optimise,
                        boolean explain,
                        boolean prefetch)

Constructor for a SingletonResults object, given a ResultsBatches object.

Parameters:

batches - a ResultsBatches object that will back this new object

optimise - true if queries should be optimised

explain - true if queries should be explained

prefetch - true to switch on the PrefetchManager

Method Detail

range

public java.util.List<java.lang.Object> range(int start,
                                              int end)
                                       throws ObjectStoreException

Returns a range of rows of results. Will fetch batches from the underlying ObjectStore if necessary.

Overrides:

range in class Results

Parameters:

start - the start index (inclusive)

end - the end index (inclusive)

Returns:

the relevant ResultRows as a List

Throws:

ObjectStoreException - if an error occurs in the underlying ObjectStore

spliterator

public java.util.Spliterator<java.lang.Object> spliterator()

Specified by:

spliterator in interface java.util.Collection<java.lang.Object>

Specified by:

spliterator in interface java.lang.Iterable<java.lang.Object>

Specified by:

spliterator in interface java.util.List<java.lang.Object>

Specified by:

spliterator in interface java.util.Set<java.lang.Object>