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java.lang.Objectnet.sf.jagg.Aggregator
net.sf.jagg.ConcatAggregator
public class ConcatAggregator
This class represents the "concatenation" aggregator over any values for
which toString
is well-defined, with an optional separator
String
between values.
Field Summary |
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Fields inherited from class net.sf.jagg.Aggregator |
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PROP_SELF |
Constructor Summary | |
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ConcatAggregator(java.lang.String property)
Constructs a ConcatAggregator that operates on the specified
property, with an empty separator string. |
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ConcatAggregator(java.lang.String property,
java.lang.String separator)
Constructs a ConcatAggregator that operates on the specified
property, with the given separator string. |
Method Summary | |
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void |
init()
Initialize the ConcatAggregator to an empty StringBuilder . |
void |
iterate(java.lang.Object value)
Concatenate the value as a String , and possibly a separator. |
void |
merge(Aggregator agg)
Merge the given Aggregator into this one. |
ConcatAggregator |
replicate()
Returns an uninitialized copy of this Aggregator object,
with the same property(ies) to analyze. |
protected void |
setProperty(java.lang.String property)
Extracts a possible separator String from the property in
the format: property, "separator". |
java.lang.String |
terminate()
Return the concatenation of all aggregated values. |
java.lang.String |
toString()
A String representation of this
ConcatAggregator , which takes into account the possible
existence of a separator String specified in the property. |
Methods inherited from class net.sf.jagg.Aggregator |
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equals, getAggregator, getAggregator, getProperty, getValueFromProperty, hashCode, isInUse, setInUse, terminateDoubleDouble |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ConcatAggregator(java.lang.String property)
ConcatAggregator
that operates on the specified
property, with an empty separator string.
property
- Concatenate this property's values.public ConcatAggregator(java.lang.String property, java.lang.String separator)
ConcatAggregator
that operates on the specified
property, with the given separator string.
property
- Concatenate this property's values.separator
- The separator String
.Method Detail |
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public ConcatAggregator replicate()
Aggregator
object,
with the same property(ies) to analyze.
replicate
in class Aggregator
Aggregator
object.protected void setProperty(java.lang.String property)
String
from the property in
the format: property, "separator".
setProperty
in class Aggregator
property
- A property name and possible separator.Aggregator.getProperty()
public void init()
StringBuilder
.
init
in class Aggregator
public void iterate(java.lang.Object value)
String
, and possibly a separator.
iterate
in class Aggregator
value
- The value to aggregate.Aggregator.getValueFromProperty(java.lang.Object, java.lang.String)
public void merge(Aggregator agg)
Aggregator
into this one. Any separator
String
will be maintained by this
ConcatAggregator
.
merge
in class Aggregator
agg
- The Aggregator
to merge into this one.public java.lang.String terminate()
terminate
in class Aggregator
String
, or an empty
String
if no values were processed.public java.lang.String toString()
String
representation of this
ConcatAggregator
, which takes into account the possible
existence of a separator String
specified in the property.
toString
in class Aggregator
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