org.jboss.dna.connector.federation.merge.strategy
Class SimpleMergeStrategy

java.lang.Object
  org.jboss.dna.connector.federation.merge.strategy.SimpleMergeStrategy

All Implemented Interfaces:

MergeStrategy

@ThreadSafe
public class SimpleMergeStrategy
extends Object
implements MergeStrategy

This merge strategy simply merges all of the contributions' properties and combines the children according to the order of the contributions. No children are merged, and all properties are used (except if they are deemed to be duplicates of the property in other contributions).

Author:

Randall Hauch

Nested Class Summary

protected static class

SimpleMergeStrategy.DualIterator

Constructor Summary

SimpleMergeStrategy()

Method Summary

boolean	isRemoveDuplicateProperties()
void	merge(FederatedNode federatedNode, List<Contribution> contributions, org.jboss.dna.graph.ExecutionContext context) Merge the contributions into a single
protected org.jboss.dna.graph.properties.Property	merge(org.jboss.dna.graph.properties.Property property1, org.jboss.dna.graph.properties.Property property2, org.jboss.dna.graph.properties.PropertyFactory factory, boolean removeDuplicates) Merge the values from the two properties with the same name, returning a new property with the newly merged values.
void	setRemoveDuplicateProperties(boolean removeDuplicateProperties)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleMergeStrategy

public SimpleMergeStrategy()

Method Detail

isRemoveDuplicateProperties

public boolean isRemoveDuplicateProperties()

Returns:

removeDuplicateProperties

setRemoveDuplicateProperties

public void setRemoveDuplicateProperties(boolean removeDuplicateProperties)

Parameters:

removeDuplicateProperties - Sets removeDuplicateProperties to the specified value.

merge

public void merge(FederatedNode federatedNode,
                  List<Contribution> contributions,
                  org.jboss.dna.graph.ExecutionContext context)

Merge the contributions into a single

Specified by:

merge in interface MergeStrategy

Parameters:

federatedNode - the federated node into which the contributions are to be merged; never null

contributions - the contributions to the node; never null, never empty, and never containing nulls

context - the context in which this operation is to be performed; never null

See Also:

MergeStrategy.merge(org.jboss.dna.connector.federation.merge.FederatedNode, java.util.List, org.jboss.dna.graph.ExecutionContext)

merge

protected org.jboss.dna.graph.properties.Property merge(org.jboss.dna.graph.properties.Property property1,
                                                        org.jboss.dna.graph.properties.Property property2,
                                                        org.jboss.dna.graph.properties.PropertyFactory factory,
                                                        boolean removeDuplicates)

Merge the values from the two properties with the same name, returning a new property with the newly merged values.

The current algorithm merges the values by concatenating the values from property1 and property2, and if removeDuplicates is true any values in property2 that are identical to values found in property1 are skipped.

Parameters:

property1 - the first property; may not be null, and must have the same name as property2

property2 - the second property; may not be null, and must have the same name as property1

factory - the property factory, used to create the result

removeDuplicates - true if this method removes any values in the second property that duplicate values found in the first property.

Returns:

the property that contains the same name as the input properties, but with values that are merged from both of the input properties