Package com.appiancorp.common.query

Class ColumnAlias

java.lang.Object

com.appiancorp.common.query.ColumnAlias

Direct Known Subclasses:

Column

@GwtCompatible
public class ColumnAlias
extends Object

Immutable bean representing the column dot notation and it's alias.

An instance can only be obtain by using the helper class QueryBuilder.Selector

Field Summary

Fields

Modifier and Type	Field	Description
static final String	LOCAL_PART
static final QName	QNAME

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ColumnAlias()	Initializes a newly created ColumnAlias object
	ColumnAlias(ColumnAlias ca)	Copy constructor
protected	ColumnAlias(String field, String alias)	Constructs a new ColumnAlias for a field with the given alias name

Method Summary

Modifier and Type	Method	Description
protected static StringBuilder	appendForToString(StringBuilder sb, String field, String alias)	Helper function which appends the alias info to a given StringBuilder
protected boolean	canEquals(Object obj)	Checks if this instance can compare against the given object.
boolean	equals(Object obj)
String	getAlias()	Returns the column's alias name
String	getField()	Returns the field name
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

LOCAL_PART

public static final String LOCAL_PART

See Also:

• Constant Field Values

QNAME

public static final QName QNAME

Constructor Details

ColumnAlias

protected ColumnAlias()

Initializes a newly created ColumnAlias object

ColumnAlias

protected ColumnAlias(String field,
 String alias)

Constructs a new ColumnAlias for a field with the given alias name

Parameters:

field - a field name

alias - an alias name for this column

ColumnAlias

public ColumnAlias(ColumnAlias ca)

Copy constructor

Parameters:

ca - a ColumnAlias

Method Details

getField

public String getField()

Returns the field name

Returns:

the field name

getAlias

public String getAlias()

Returns the column's alias name

Returns:

the column's alias name

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

canEquals

protected boolean canEquals(Object obj)

Checks if this instance can compare against the given object.

Parameters:

obj - an Object

Returns:

true if the given object is an instanceof this class.

toString

public String toString()

Overrides:

toString in class Object

appendForToString

protected static StringBuilder appendForToString(StringBuilder sb,
 String field,
 String alias)

Helper function which appends the alias info to a given StringBuilder

Parameters:

sb - a StringBuilder

field - a field name

alias - an alias name

Returns:

the same StringBuilder by appending the alias info