com.apple.foundationdb.record.query.expressions

Class Comparisons.TextComparison

java.lang.Object

com.apple.foundationdb.record.query.expressions.Comparisons.TextComparison

All Implemented Interfaces:

PlanHashable, Comparisons.Comparison

Direct Known Subclasses:

Comparisons.TextContainsAllPrefixesComparison, Comparisons.TextWithMaxDistanceComparison

Enclosing class:

Comparisons

public static class Comparisons.TextComparison
extends Object
implements Comparisons.Comparison

A text-style comparison, such as containing a given set of tokens.

Constructor Summary

Constructors

Constructor and Description
TextComparison(Comparisons.Type type, List<String> tokens, String tokenizerName, String fallbackTokenizerName)
TextComparison(Comparisons.Type type, String tokens, String tokenizerName, String fallbackTokenizerName)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
Boolean	eval(FDBRecordStoreBase<?> store, EvaluationContext context, Object value) Evaluate this comparison for the value taken from the target record.
Object	getComparand(FDBRecordStoreBase<?> store, EvaluationContext context) Get the comparison value from the evaluation context.
String	getFallbackTokenizerName()
String	getTokenizerName()
Comparisons.Type	getType() Get the comparison type.
int	hashCode()
int	planHash() Return a hash similar to hashCode, but with the additional guarantee that is is stable across JVMs.
String	toString()
String	typelessString() Get the printed representation of the comparison less the comparison operator itself.
void	validate(Descriptors.FieldDescriptor descriptor, boolean fannedOut) Validate that this comparison is compatible with a given record field.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.apple.foundationdb.record.query.expressions.Comparisons.Comparison

getComparand

Methods inherited from interface com.apple.foundationdb.record.PlanHashable

combineHashes, iterablePlanHash, objectPlanHash, objectsPlanHash, planHash, planHash, planHashUnordered, stringHashUnordered

Constructor Detail

TextComparison

public TextComparison(@Nonnull
                      Comparisons.Type type,
                      @Nonnull
                      String tokens,
                      @Nullable
                      String tokenizerName,
                      @Nonnull
                      String fallbackTokenizerName)

TextComparison

public TextComparison(@Nonnull
                      Comparisons.Type type,
                      @Nonnull
                      List<String> tokens,
                      @Nullable
                      String tokenizerName,
                      @Nonnull
                      String fallbackTokenizerName)

Method Detail

eval

@Nullable
public Boolean eval(@Nonnull
                              FDBRecordStoreBase<?> store,
                              @Nonnull
                              EvaluationContext context,
                              @Nullable
                              Object value)

Description copied from interface: Comparisons.Comparison

Evaluate this comparison for the value taken from the target record.

Specified by:

eval in interface Comparisons.Comparison

Parameters:

store - the record store for the query

context - the evaluation context for getting the other comparison value

value - the value taken from the record

Returns:

the tri-valued logic result of the comparison

validate

public void validate(@Nonnull
                     Descriptors.FieldDescriptor descriptor,
                     boolean fannedOut)

Description copied from interface: Comparisons.Comparison

Validate that this comparison is compatible with a given record field.

Specified by:

validate in interface Comparisons.Comparison

Parameters:

descriptor - the Protobuf descriptor for the proposed comparison field

fannedOut - whether a repeated field fans out into multiple comparisons or is treated as a single list value

getTokenizerName

@Nullable
public String getTokenizerName()

getFallbackTokenizerName

@Nonnull
public String getFallbackTokenizerName()

getType

@Nonnull
public Comparisons.Type getType()

Description copied from interface: Comparisons.Comparison

Get the comparison type.

Specified by:

getType in interface Comparisons.Comparison

Returns:

the comparison type

getComparand

@Nullable
public Object getComparand(@Nullable
                                     FDBRecordStoreBase<?> store,
                                     @Nullable
                                     EvaluationContext context)

Description copied from interface: Comparisons.Comparison

Get the comparison value from the evaluation context.

Specified by:

getComparand in interface Comparisons.Comparison

Parameters:

store - the record store for the query

context - the context for query evaluation

Returns:

the value to be compared

typelessString

@Nonnull
public String typelessString()

Description copied from interface: Comparisons.Comparison

Get the printed representation of the comparison less the comparison operator itself.

Specified by:

typelessString in interface Comparisons.Comparison

Returns:

the typeless string

toString

@Nonnull
public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

planHash

public int planHash()

Description copied from interface: PlanHashable

Return a hash similar to hashCode, but with the additional guarantee that is is stable across JVMs.

Specified by:

planHash in interface PlanHashable

Returns:

a stable hash code

hashCode

public int hashCode()

Overrides:

hashCode in class Object