public final class Expression
extends java.lang.Object
Expression
is an object level expression that may contains references to ODI objects as
CrossRef
s. An Expression
is typically used within SQL expressions / queries held
by ODI objects.
In order to create an Expression
instance, it is recommended to use ExpressionStringBuilder
or ExpressionStringParser
. The public constructor defined by this class is used internally and shouldn't
be used by application code.
CrossRef
Modifier and Type | Class and Description |
---|---|
static class |
Expression.SqlGroupType
Type safe enumeration that represents SQL group function type an
Expression
can hold. |
Constructor and Description |
---|
Expression(Expression pExpression)
Copy constructor for expression.
|
Expression(java.lang.String pExpression,
CrossRef[] pCrossRefs,
Expression.SqlGroupType pSqlGroupType)
Construct a new
Expression . |
Modifier and Type | Method and Description |
---|---|
boolean |
equals(java.lang.Object pObj) |
java.lang.String |
getAsString()
Obtains the string value of this expression.
|
CrossRef[] |
getCrossRefs()
Obtains the
CrossRef s this expression defines, or null if none. |
Expression.SqlGroupType |
getSqlGroupType()
Returns the SQL group type of this expression.
|
java.lang.String |
toString() |
public Expression(java.lang.String pExpression, CrossRef[] pCrossRefs, Expression.SqlGroupType pSqlGroupType)
Expression
.
This constructor should NOT be used by application code. It is internally used within the implementation.
Consider the classes ExpressionStringBuilder
and ExpressionStringParser
as the convenient way
to create a new Expression.
pExpression
- the expression text valuepCrossRefs
- the CrossRefs of the expressionpSqlGroupType
- the SQL group type of the expressionpublic Expression(Expression pExpression)
pExpression
- public java.lang.String toString()
toString
in class java.lang.Object
public java.lang.String getAsString()
String
representing this expression object.public Expression.SqlGroupType getSqlGroupType()
public CrossRef[] getCrossRefs()
CrossRef
s this expression defines, or null
if none.
The CrossRef
s are ordered by their position in the expression.CrossRef
s ordered by their position in the expressionpublic boolean equals(java.lang.Object pObj)
equals
in class java.lang.Object