Package net.sf.saxon.ma.map

Class FixedMapWithStringKeys

java.lang.Object

net.sf.saxon.ma.MapOrArray

net.sf.saxon.ma.map.MapItem

net.sf.saxon.ma.map.MapWithTypeCache

net.sf.saxon.ma.map.AbstractFixedMap

net.sf.saxon.ma.map.FixedMapWithStringKeys

All Implemented Interfaces:

Iterable<KeyValuePair>, Callable, FunctionItem, GroundedValue, Item, Sequence

public class FixedMapWithStringKeys
extends AbstractFixedMap

A variant of the FixedMap map implementation optimized for the case where the keys are all instances of xs:string. This saves space because it avoids the need (a) to wrap the UnicodeString values in a StringValue, and (b) to store a type annotation (as this is always xs:string

Nested Class Summary

Nested classes/interfaces inherited from class net.sf.saxon.ma.map.MapItem

MapItem.KeyIterator

Field Summary

Fields inherited from class net.sf.saxon.ma.map.AbstractFixedMap

index, values

Fields inherited from class net.sf.saxon.ma.map.MapWithTypeCache

knownKeyType, knownValueType

Fields inherited from class net.sf.saxon.ma.map.MapItem

mapConstructorDuplicatesAction, xslMapDuplicatesAction, xslRecordDuplicatesAction

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FixedMapWithStringKeys(UnicodeString[] keys, GroundedValue[] values, int specVersion, HashMap<AtomicMatchKey,Integer> index)	Construct a FixedMap supplying the entries as an array of keys and a corresponding array of value.

Method Summary

Modifier and Type	Method	Description
static FixedMapWithStringKeys	fromJavaMap(Map<UnicodeString,GroundedValue> map)
protected AtomicValue	getKey(int position)	Get the key at a given offset.
GroundedValue	getU(UnicodeString key)	Get an entry from the map, supplying a UnicodeString as the key

Methods inherited from class net.sf.saxon.ma.map.AbstractFixedMap

ensureIndexed, get, getBuilder, getOffset, getPosition, getValue, iterator, keyValuePairs, put, putOffsetIfAbsent, remove, size, toString

Methods inherited from class net.sf.saxon.ma.map.MapWithTypeCache

conforms, setKnownType

Methods inherited from class net.sf.saxon.ma.map.MapItem

atomize, call, deepEqual40, deepEquals, effectiveBooleanValue, entries, export, followingKeyValuePairs, getAnnotations, getArity, getDescription, getFunctionItemType, getFunctionName, getGenre, getItemType, getItemTypeOfSequence, getOperandRoles, getSpecVersion, getTypedValue, getUnicodeStringValue, getWithPlan, isArray, isEmpty, isKnownToConform, isMap, isTrustedResultType, itemAt, keys, makeNewContext, mapToString, precedingKeyValuePairs, setSpecVersion, toShortString

Methods inherited from class net.sf.saxon.ma.MapOrArray

obtainRootJNode

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.saxon.om.FunctionItem

isSequenceVariadic

Methods inherited from interface net.sf.saxon.om.GroundedValue

asIterable, concatenate, containsNode, materialize

Methods inherited from interface net.sf.saxon.om.Item

getLabel, getLength, getStringValue, head, isStreamed, iterate, reduce, subsequence

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface net.sf.saxon.om.Sequence

makeRepeatable

Constructor Details

FixedMapWithStringKeys

protected FixedMapWithStringKeys(UnicodeString[] keys,
 GroundedValue[] values,
 int specVersion,
 HashMap<AtomicMatchKey,Integer> index)

Construct a FixedMap supplying the entries as an array of keys and a corresponding array of value. The caller is responsible for ensuring that there are no duplicate keys. The two arrays (of keys and values) must have the same length. The content of the arrays must not be subsequently modified.

Parameters:

keys - an array of keys

values - a corresponding array of values

index - a hash map indexing the values

Method Details

getKey

protected AtomicValue getKey(int position)

Description copied from class: AbstractFixedMap

Get the key at a given offset. This method is provided for use by subclasses, which can store the actual key in different ways.

Specified by:

getKey in class AbstractFixedMap

Parameters:

position - the offset (sibling position within the ordered map) of the required key

Returns:

the key at the specified position

fromJavaMap

public static FixedMapWithStringKeys fromJavaMap(Map<UnicodeString,GroundedValue> map)

getU

public GroundedValue getU(UnicodeString key)

Get an entry from the map, supplying a UnicodeString as the key

Overrides:

getU in class MapItem

Parameters:

key - the key

Returns:

the relevant entry if present, or null if absent.