mcconnell 2004/03/03 19:27:44
Added: repository/impl/src/java/org/apache/avalon/repository/impl
ArtifactSequenceParameter.java
Log:
Add support for the addition of factory artifacts in the repository criteria.
Revision Changes Path
1.1
avalon/repository/impl/src/java/org/apache/avalon/repository/impl/ArtifactSequenceParameter.java
Index: ArtifactSequenceParameter.java
===================================================================
/*
* Copyright 2004 Apache Software Foundation
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
*
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.avalon.repository.impl;
import java.util.ArrayList;
import java.util.StringTokenizer;
import org.apache.avalon.repository.Artifact;
import org.apache.avalon.util.criteria.Parameter;
import org.apache.avalon.util.criteria.CriteriaException;
/**
* A parameter descriptor that supports transformation of a
* a string to a string array based on a supplied token.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Avalon Development Team</a>
* @version $Revision: 1.1 $
*/
public class ArtifactSequenceParameter extends Parameter
{
//--------------------------------------------------------------
// immutable state
//--------------------------------------------------------------
private final String m_delimiter;
//--------------------------------------------------------------
// constructors
//--------------------------------------------------------------
/**
* Transform a string to a string array.
* @param key the parameter key
* @param delimiter the delimiter character
* @param defaults the default string array
*/
public ArtifactSequenceParameter(
final String key, final String delimiter, Artifact[] defaults )
{
super( key, Artifact[].class, defaults );
m_delimiter = delimiter;
}
/**
* Resolve a supplied string or string array to a artifact array value.
* @param value the value to resolve
* @exception CriteriaException if an error occurs
*/
public Object resolve( Object value )
throws CriteriaException
{
if( value == null ) return null;
if( value instanceof Artifact[] )
{
return value;
}
if( value instanceof String[] )
{
String[] specs = (String[]) value;
Artifact[] artifacts = new Artifact[ specs.length ];
for( int i=0; i<specs.length; i++ )
{
final String spec = specs[i];
artifacts[i] = Artifact.createArtifact( spec );
}
return artifacts;
}
else if( value instanceof String )
{
ArrayList list = new ArrayList();
String s = (String) value;
StringTokenizer tokenizer =
new StringTokenizer( s, m_delimiter );
while( tokenizer.hasMoreTokens() )
{
final String spec = tokenizer.nextToken();
Artifact artifact = Artifact.createArtifact( spec );
list.add( artifact );
}
return list.toArray( new Artifact[0] );
}
else
{
final String error =
"Don't know how to transform an instance of ["
+ value.getClass().getName()
+ " to a Artifact[].";
throw new CriteriaException( error );
}
}
}
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