public class ColumnExpression extends AbstractExpression implements Predicate
Modifier and Type | Field and Description |
---|---|
protected java.lang.String |
m_field |
Constructor and Description |
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ColumnExpression(java.lang.String field)
Create a new ColumnExpression.
|
Modifier and Type | Method and Description |
---|---|
java.lang.Object |
get(Tuple t)
By default, throws an UnsupportedOperationException.
|
boolean |
getBoolean(Tuple t)
By default, throws an UnsupportedOperationException.
|
java.lang.String |
getColumnName()
Get the column / data field name used by this expression.
|
double |
getDouble(Tuple t)
By default, throws an UnsupportedOperationException.
|
float |
getFloat(Tuple t)
By default, throws an UnsupportedOperationException.
|
int |
getInt(Tuple t)
By default, throws an UnsupportedOperationException.
|
long |
getLong(Tuple t)
By default, throws an UnsupportedOperationException.
|
java.lang.Class |
getType(Schema s)
Returns the type that this expression evaluates to when tuples
with the given Schema are provided as input.
|
java.lang.String |
toString() |
addChildListeners, addExpressionListener, expressionChanged, fireExpressionChange, hasListeners, removeChildListeners, removeExpressionListener, visit
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
addExpressionListener, removeExpressionListener, visit
public ColumnExpression(java.lang.String field)
field
- the column / data field name to usepublic java.lang.String getColumnName()
public java.lang.Class getType(Schema s)
Expression
getType
in interface Expression
Expression.getType(prefuse.data.Schema)
public java.lang.Object get(Tuple t)
AbstractExpression
get
in interface Expression
get
in class AbstractExpression
t
- the input TupleExpression.get(prefuse.data.Tuple)
public int getInt(Tuple t)
AbstractExpression
getInt
in interface Expression
getInt
in class AbstractExpression
t
- the input TupleExpression.getInt(prefuse.data.Tuple)
public long getLong(Tuple t)
AbstractExpression
getLong
in interface Expression
getLong
in class AbstractExpression
t
- the input TupleExpression.getLong(prefuse.data.Tuple)
public float getFloat(Tuple t)
AbstractExpression
getFloat
in interface Expression
getFloat
in class AbstractExpression
t
- the input TupleExpression.getFloat(prefuse.data.Tuple)
public double getDouble(Tuple t)
AbstractExpression
getDouble
in interface Expression
getDouble
in class AbstractExpression
t
- the input TupleExpression.getDouble(prefuse.data.Tuple)
public boolean getBoolean(Tuple t)
AbstractExpression
getBoolean
in interface Expression
getBoolean
in class AbstractExpression
t
- the input TupleExpression.getBoolean(prefuse.data.Tuple)
public java.lang.String toString()
toString
in class java.lang.Object
Object.toString()
Copyright ? 2013 Regents of the University of California