com.espertech.esper.common.internal.util

Class CollectionUtil

java.lang.Object

com.espertech.esper.common.internal.util.CollectionUtil

public class CollectionUtil
extends Object

Utility for handling collection or array tasks.

Field Summary

Fields

Modifier and Type	Field and Description
static CodegenExpression	EMPTY_LIST_EXPRESSION
static SortedMap	EMPTY_SORTED_MAP
static EventBean[]	EVENTBEANARRAY_EMPTY
static EventBean[][]	EVENTBEANARRAYARRAY_EMPTY
static String	METHOD_ITERATORTOARRAYEVENTS
static String	METHOD_SHRINKARRAYEVENTARRAY
static String	METHOD_SHRINKARRAYEVENTS
static String	METHOD_SHRINKARRAYOBJECTS
static String	METHOD_TOARRAYEVENTS
static String	METHOD_TOARRAYEVENTSARRAY
static String	METHOD_TOARRAYMAYNULL
static String	METHOD_TOARRAYNULLFOREMPTYEVENTS
static String	METHOD_TOARRAYNULLFOREMPTYOBJECTS
static String	METHOD_TOARRAYNULLFOREMPTYVALUEEVENTS
static String	METHOD_TOARRAYNULLFOREMPTYVALUEVALUES
static String	METHOD_TOARRAYOBJECTS
static Iterable<EventBean>	NULL_EVENT_ITERABLE
static Iterator<EventBean>	NULL_EVENT_ITERATOR
static Object[]	OBJECTARRAY_EMPTY
static Object[][]	OBJECTARRAYARRAY_EMPTY
static Set<EventBean>	SINGLE_NULL_ROW_EVENT_SET
static StopCallback	STOP_CALLBACK_NONE
static String[]	STRINGARRAY_EMPTY

Constructor Summary

Constructors

Constructor and Description
CollectionUtil()

Method Summary

Modifier and Type	Method and Description
static Object	addArrays(Object first, Object second)
static EventBean[]	addArrayWithSetSemantics(EventBean[] arrayOne, EventBean[] arrayTwo)
static void	addEventByKeyLazyListMapBack(Object sortKey, EventBean eventBean, Map<Object,Object> eventMap)
static void	addEventByKeyLazyListMapFront(Object key, EventBean bean, Map<Object,Object> eventMap)
static int[]	addValue(int[] ints, int i)
static Object[]	addValue(Object[] values, Object value)
static String[]	appendArrayConditional(String[] appendedTo, boolean test, String appended)
static String[]	appendArrayConditional(String appendedTo, boolean test, String appended)
static Object	arrayExpandAddElements(Object array, Collection elementsToAdd)
static Object	arrayExpandAddElements(Object array, Object[] elementsToAdd)
static Object	arrayExpandAddSingle(Object array, Object elementsToAdd)
static Object	arrayShrinkRemoveSingle(Object array, int index)
static Collection	arrayToCollectionAllowNull(Object array)
static CodegenExpression	arrayToCollectionAllowNullCodegen(CodegenMethodScope codegenMethodScope, Class arrayType, CodegenExpression array, CodegenClassScope codegenClassScope)
static Map<String,Object>	buildMap(Object... pairs)
static Map<String,Object>	buildMap(Object[][] entries)
static int	capacityHashMap(int expectedSize)
static boolean	compare(String[] otherIndexProps, String[] thisIndexProps)
static int	compareValues(Object valueOne, Object valueTwo, boolean isDescending) Compares two nullable values.
static int	compareValuesCollated(Object valueOne, Object valueTwo, boolean isDescending, Collator collator) Compares two nullable values using Collator, for use with string-typed values.
static String[]	copyAndSort(String[] input) Copy an sort the input array.
static String[]	copyArray(String[] arrayToCopy)
static String[]	copySortArray(String[] values)
static int	findItem(String[] items, String item)
static int[]	intArray(Collection<Integer> set) Returns an array of integer values from the set of integer values
static boolean	isAllNullArray(Object array)
static boolean	isAnySet(boolean[] array)
static Collection	iterableToCollection(Iterable iterable) NOTE: Code-generation-invoked method, method name and parameter order matters
static EventBean[]	iteratorToArrayEvents(Iterator<EventBean> iterator) NOTE: Code-generation-invoked method, method name and parameter order matters
static Map<String,Object>	populateNameValueMap(Object... values)
static boolean	removeEventByKeyLazyListMap(Object key, EventBean bean, Map<Object,Object> eventMap)
static <T> int	searchArray(T[] array, T item)
static EventBean[][]	shrinkArrayEventArray(int count, EventBean[][] eventArrays) NOTE: Code-generation-invoked method, method name and parameter order matters
static EventBean[]	shrinkArrayEvents(int count, EventBean[] events) NOTE: Code-generation-invoked method, method name and parameter order matters
static Object[]	shrinkArrayObjects(int count, Object[] keys) NOTE: Code-generation-invoked method, method name and parameter order matters
static boolean	sortCompare(String[] valuesOne, String[] valuesTwo)
static String[]	toArray(Collection<String> strings)
static EventBean[]	toArrayEvents(Collection<EventBean> events) NOTE: Code-generation-invoked method, method name and parameter order matters
static EventBean[][]	toArrayEventsArray(ArrayDeque<EventBean[]> arrays) NOTE: Code-generation-invoked method, method name and parameter order matters
static EventBean[]	toArrayMayNull(Collection<EventBean> collection) NOTE: Code-generation-invoked method, method name and parameter order matters
static EventBean[]	toArrayMayNull(EventBean event)
static EventBean[]	toArrayNullForEmptyEvents(Collection<EventBean> events) NOTE: Code-generation-invoked method, method name and parameter order matters
static Object[]	toArrayNullForEmptyObjects(Collection<Object> values) NOTE: Code-generation-invoked method, method name and parameter order matters
static EventBean[]	toArrayNullForEmptyValueEvents(Map<Object,EventBean> events) NOTE: Code-generation-invoked method, method name and parameter order matters
static Object[]	toArrayNullForEmptyValueValues(Map<Object,Object> values) NOTE: Code-generation-invoked method, method name and parameter order matters
static Object[]	toArrayObjects(List<Object> values) NOTE: Code-generation-invoked method, method name and parameter order matters
static String	toString(Collection<Integer> stack, String delimiterChars)
static <T> String	toString(Collection<T> collection) Returns a list of the elements invoking toString on non-null elements.
static String	toStringArray(Object[] received)
static <K,V> Map<K,V>	twoEntryMap(K k1, V v1, K k2, V v2)

Methods inherited from class java.lang.Object

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

Field Detail

METHOD_SHRINKARRAYEVENTS

public static final String METHOD_SHRINKARRAYEVENTS

See Also:

Constant Field Values

METHOD_SHRINKARRAYEVENTARRAY

public static final String METHOD_SHRINKARRAYEVENTARRAY

See Also:

Constant Field Values

METHOD_SHRINKARRAYOBJECTS

public static final String METHOD_SHRINKARRAYOBJECTS

See Also:

Constant Field Values

METHOD_TOARRAYEVENTS

public static final String METHOD_TOARRAYEVENTS

See Also:

Constant Field Values

METHOD_TOARRAYOBJECTS

public static final String METHOD_TOARRAYOBJECTS

See Also:

Constant Field Values

METHOD_TOARRAYEVENTSARRAY

public static final String METHOD_TOARRAYEVENTSARRAY

See Also:

Constant Field Values

METHOD_TOARRAYNULLFOREMPTYEVENTS

public static final String METHOD_TOARRAYNULLFOREMPTYEVENTS

See Also:

Constant Field Values

METHOD_TOARRAYNULLFOREMPTYOBJECTS

public static final String METHOD_TOARRAYNULLFOREMPTYOBJECTS

See Also:

Constant Field Values

METHOD_TOARRAYNULLFOREMPTYVALUEEVENTS

public static final String METHOD_TOARRAYNULLFOREMPTYVALUEEVENTS

See Also:

Constant Field Values

METHOD_TOARRAYNULLFOREMPTYVALUEVALUES

public static final String METHOD_TOARRAYNULLFOREMPTYVALUEVALUES

See Also:

Constant Field Values

METHOD_TOARRAYMAYNULL

public static final String METHOD_TOARRAYMAYNULL

See Also:

Constant Field Values

METHOD_ITERATORTOARRAYEVENTS

public static final String METHOD_ITERATORTOARRAYEVENTS

See Also:

Constant Field Values

NULL_EVENT_ITERATOR

public static final Iterator<EventBean> NULL_EVENT_ITERATOR

NULL_EVENT_ITERABLE

public static final Iterable<EventBean> NULL_EVENT_ITERABLE

EMPTY_SORTED_MAP

public static final SortedMap EMPTY_SORTED_MAP

EVENTBEANARRAY_EMPTY

public static final EventBean[] EVENTBEANARRAY_EMPTY

EVENTBEANARRAYARRAY_EMPTY

public static final EventBean[][] EVENTBEANARRAYARRAY_EMPTY

SINGLE_NULL_ROW_EVENT_SET

public static final Set<EventBean> SINGLE_NULL_ROW_EVENT_SET

STRINGARRAY_EMPTY

public static final String[] STRINGARRAY_EMPTY

OBJECTARRAY_EMPTY

public static final Object[] OBJECTARRAY_EMPTY

OBJECTARRAYARRAY_EMPTY

public static final Object[][] OBJECTARRAYARRAY_EMPTY

EMPTY_LIST_EXPRESSION

public static final CodegenExpression EMPTY_LIST_EXPRESSION

STOP_CALLBACK_NONE

public static final StopCallback STOP_CALLBACK_NONE

Constructor Detail

CollectionUtil

public CollectionUtil()

Method Detail

toString

public static String toString(Collection<Integer> stack,
                              String delimiterChars)

arrayExpandAddElements

public static Object arrayExpandAddElements(Object array,
                                            Object[] elementsToAdd)

arrayShrinkRemoveSingle

public static Object arrayShrinkRemoveSingle(Object array,
                                             int index)

arrayExpandAddElements

public static Object arrayExpandAddElements(Object array,
                                            Collection elementsToAdd)

arrayExpandAddSingle

public static Object arrayExpandAddSingle(Object array,
                                          Object elementsToAdd)

addValue

public static int[] addValue(int[] ints,
                             int i)

addValue

public static Object[] addValue(Object[] values,
                                Object value)

findItem

public static int findItem(String[] items,
                           String item)

intArray

public static int[] intArray(Collection<Integer> set)

Returns an array of integer values from the set of integer values

Parameters:

set - to return array for

Returns:

array

copySortArray

public static String[] copySortArray(String[] values)

sortCompare

public static boolean sortCompare(String[] valuesOne,
                                  String[] valuesTwo)

toString

public static <T> String toString(Collection<T> collection)

Returns a list of the elements invoking toString on non-null elements.

Type Parameters:

T - type

Parameters:

collection - to render

Returns:

comma-separate list of values (no escape)

compare

public static boolean compare(String[] otherIndexProps,
                              String[] thisIndexProps)

isAllNullArray

public static boolean isAllNullArray(Object array)

toStringArray

public static String toStringArray(Object[] received)

populateNameValueMap

public static Map<String,Object> populateNameValueMap(Object... values)

addArrays

public static Object addArrays(Object first,
                               Object second)

toArrayNullForEmptyEvents

public static EventBean[] toArrayNullForEmptyEvents(Collection<EventBean> events)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

events - events

Returns:

array or null

toArrayNullForEmptyObjects

public static Object[] toArrayNullForEmptyObjects(Collection<Object> values)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

values - values

Returns:

array or null

addArrayWithSetSemantics

public static EventBean[] addArrayWithSetSemantics(EventBean[] arrayOne,
                                                   EventBean[] arrayTwo)

toArray

public static String[] toArray(Collection<String> strings)

toArrayEvents

public static EventBean[] toArrayEvents(Collection<EventBean> events)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

events - values

Returns:

array

toArrayObjects

public static Object[] toArrayObjects(List<Object> values)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

values - values

Returns:

array

toArrayEventsArray

public static EventBean[][] toArrayEventsArray(ArrayDeque<EventBean[]> arrays)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

arrays - values

Returns:

array

searchArray

public static <T> int searchArray(T[] array,
                                  T item)

removeEventByKeyLazyListMap

public static boolean removeEventByKeyLazyListMap(Object key,
                                                  EventBean bean,
                                                  Map<Object,Object> eventMap)

addEventByKeyLazyListMapBack

public static void addEventByKeyLazyListMapBack(Object sortKey,
                                                EventBean eventBean,
                                                Map<Object,Object> eventMap)

addEventByKeyLazyListMapFront

public static void addEventByKeyLazyListMapFront(Object key,
                                                 EventBean bean,
                                                 Map<Object,Object> eventMap)

isAnySet

public static boolean isAnySet(boolean[] array)

twoEntryMap

public static <K,V> Map<K,V> twoEntryMap(K k1,
                                         V v1,
                                         K k2,
                                         V v2)

arrayToCollectionAllowNull

public static Collection arrayToCollectionAllowNull(Object array)

arrayToCollectionAllowNullCodegen

public static CodegenExpression arrayToCollectionAllowNullCodegen(CodegenMethodScope codegenMethodScope,
                                                                  Class arrayType,
                                                                  CodegenExpression array,
                                                                  CodegenClassScope codegenClassScope)

iterableToCollection

public static Collection iterableToCollection(Iterable iterable)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

iterable - iterable

Returns:

collection

capacityHashMap

public static int capacityHashMap(int expectedSize)

toArrayMayNull

public static EventBean[] toArrayMayNull(EventBean event)

toArrayMayNull

public static EventBean[] toArrayMayNull(Collection<EventBean> collection)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

collection - collection

Returns:

array or null

shrinkArrayEvents

public static EventBean[] shrinkArrayEvents(int count,
                                            EventBean[] events)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

count - cnt

events - events

Returns:

shrank array

shrinkArrayObjects

public static Object[] shrinkArrayObjects(int count,
                                          Object[] keys)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

count - cnt

keys - values

Returns:

shrank array

shrinkArrayEventArray

public static EventBean[][] shrinkArrayEventArray(int count,
                                                  EventBean[][] eventArrays)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

count - cnt

eventArrays - events

Returns:

shrank array

toArrayNullForEmptyValueEvents

public static EventBean[] toArrayNullForEmptyValueEvents(Map<Object,EventBean> events)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

events - events

Returns:

null or array

toArrayNullForEmptyValueValues

public static Object[] toArrayNullForEmptyValueValues(Map<Object,Object> values)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

values - events

Returns:

null or array

iteratorToArrayEvents

public static EventBean[] iteratorToArrayEvents(Iterator<EventBean> iterator)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

iterator - iterator

Returns:

array of events

buildMap

public static Map<String,Object> buildMap(Object... pairs)

buildMap

public static Map<String,Object> buildMap(Object[][] entries)

compareValuesCollated

public static int compareValuesCollated(Object valueOne,
                                        Object valueTwo,
                                        boolean isDescending,
                                        Collator collator)

Compares two nullable values using Collator, for use with string-typed values.

Parameters:

valueOne - first value to compare

valueTwo - second value to compare

isDescending - true for descending

collator - the Collator for comparing

Returns:

compare result

compareValues

public static int compareValues(Object valueOne,
                                Object valueTwo,
                                boolean isDescending)

Compares two nullable values.

Parameters:

valueOne - first value to compare

valueTwo - second value to compare

isDescending - true for descending

Returns:

compare result

copyArray

public static String[] copyArray(String[] arrayToCopy)

appendArrayConditional

public static String[] appendArrayConditional(String[] appendedTo,
                                              boolean test,
                                              String appended)

appendArrayConditional

public static String[] appendArrayConditional(String appendedTo,
                                              boolean test,
                                              String appended)

copyAndSort

public static String[] copyAndSort(String[] input)

Copy an sort the input array.

Parameters:

input - to sort

Returns:

sorted copied array