/*******************************************************************************
* Copyright (c) 2010, 2014 Sonatype, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sonatype, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.aether.internal.ant.types;
import org.apache.maven.model.Model;
import org.apache.tools.ant.Project;
import org.codehaus.plexus.interpolation.reflection.ReflectionValueExtractor;
/**
*/
class ModelValueExtractor
{
private static final String PREFIX_PROPERTIES = "properties.";
private final String prefix;
private final Project project;
private final Model model;
public ModelValueExtractor( String prefix, Model model, Project project )
{
if ( model == null )
{
throw new IllegalArgumentException( "reference to Maven POM has not been specified" );
}
if ( project == null )
{
throw new IllegalArgumentException( "reference to Ant project has not been specified" );
}
if ( prefix == null || prefix.length() <= 0 )
{
prefix = "pom.";
}
else if ( !prefix.endsWith( "." ) )
{
prefix += '.';
}
this.prefix = prefix;
this.model = model;
this.project = project;
}
public Project getProject()
{
return project;
}
public boolean isApplicable( String expression )
{
return expression.startsWith( prefix );
}
public Object getValue( String expression )
{
if ( expression.startsWith( prefix ) )
{
String expr = expression.substring( prefix.length() );
try
{
if ( expr.startsWith( PREFIX_PROPERTIES ) )
{
String key = expr.substring( PREFIX_PROPERTIES.length() );
return model.getProperties().getProperty( key );
}
return ReflectionValueExtractor.evaluate( expr, model, false );
}
catch ( Exception e )
{
project.log( "Could not retrieve '" + expression + "' from POM: " + e.getMessage(), e, Project.MSG_WARN );
return null;
}
}
else
{
return null;
}
}
}