com.attivio.sdk.search.fields

Class Coalesce

java.lang.Object

com.attivio.sdk.search.fields.FieldExpression

com.attivio.sdk.search.fields.MultiaryFieldExpression

com.attivio.sdk.search.fields.Coalesce

All Implemented Interfaces:

Serializable, Cloneable

public class Coalesce
extends MultiaryFieldExpression

Coalesce multiple sub FieldExpressions.

This field returned for this FieldExpression will be that of the first non-null FieldExpression specified as arguments to this field expression. NOTE: the data type of the returned field will be the most lenient data type of all sub FieldExpressions. That is, if the child field expressions are of the data types INT, STRING, DOUBLE, then the returned field will be a STRING field.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.attivio.sdk.search.fields.MultiaryFieldExpression

MultiaryFieldExpression.Method

Nested classes/interfaces inherited from class com.attivio.sdk.search.fields.FieldExpression

FieldExpression.StringMode

Field Summary

Fields inherited from class com.attivio.sdk.search.fields.MultiaryFieldExpression

args

Fields inherited from class com.attivio.sdk.search.fields.FieldExpression

alias, EMPTY_ARRAY

Constructor Summary

Constructors

Constructor and Description
Coalesce(FieldExpression... args)
Coalesce(FieldExpression[] args, String alias)

Method Summary

Modifier and Type	Method and Description
Coalesce	clone()
protected Coalesce	clone(FieldExpression... x) Create a new instance of this FieldExpression, with different arguments.
SchemaField.Type	getType(Schema schema) Resolve the type for this expression.
int	hashCode()
protected boolean	parametersEqual(FieldExpression other) Returns true if other's parameters are the same as this.
protected void	toString(StringBuilder buffer, FieldExpression.StringMode mode) Writes the string representation of this field expression to buffer.

Methods inherited from class com.attivio.sdk.search.fields.MultiaryFieldExpression

equalsIgnoreAlias, getArgument, getArgumentCount, getArguments, hasChildren, isConstant, rewrite, rewriteChildren, setArguments

Methods inherited from class com.attivio.sdk.search.fields.FieldExpression

as, containsAlias, copyOf, equals, equalsIgnoreAlias, getAlias, getDefaultAlias, getFieldName, handleFieldExpression, isConstant, quote, rewrite, setAlias, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Coalesce

public Coalesce(FieldExpression... args)

Coalesce

public Coalesce(FieldExpression[] args,
                String alias)

Method Detail

getType

public SchemaField.Type getType(Schema schema)

Resolve the type for this expression.

Specified by:

getType in class FieldExpression

toString

protected void toString(StringBuilder buffer,
                        FieldExpression.StringMode mode)

Writes the string representation of this field expression to buffer.

NOTE: the alias will not be written to buffer by this function.

Specified by:

toString in class FieldExpression

parametersEqual

protected boolean parametersEqual(FieldExpression other)

Returns true if other's parameters are the same as this.

Specified by:

parametersEqual in class MultiaryFieldExpression

hashCode

public int hashCode()

Overrides:

hashCode in class MultiaryFieldExpression

clone

public Coalesce clone()

Overrides:

clone in class FieldExpression

clone

protected Coalesce clone(FieldExpression... x)

Create a new instance of this FieldExpression, with different arguments.

Specified by:

clone in class MultiaryFieldExpression