/*******************************************************************************
* 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.tasks;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.ComponentHelper;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.Reference;
/**
*/
public abstract class RefTask
extends Task
{
private Reference ref;
public boolean isReference()
{
return ref != null;
}
public void setRefid( final Reference ref )
{
this.ref = ref;
}
protected void checkAttributesAllowed()
{
if ( isReference() )
{
throw tooManyAttributes();
}
}
protected void checkChildrenAllowed()
{
if ( isReference() )
{
throw noChildrenAllowed();
}
}
protected BuildException tooManyAttributes()
{
return new BuildException( "You must not specify more than one " + "attribute when using refid" );
}
protected BuildException noChildrenAllowed()
{
return new BuildException( "You must not specify nested elements " + "when using refid" );
}
protected String getDataTypeName()
{
return ComponentHelper.getElementName( getProject(), this, true );
}
protected Object getCheckedRef()
{
return getCheckedRef( getClass(), getDataTypeName(), getProject() );
}
protected Object getCheckedRef( final Class<?> requiredClass, final String dataTypeName, final Project project )
{
if ( project == null )
{
throw new BuildException( "No Project specified" );
}
Object o = ref.getReferencedObject( project );
if ( !( requiredClass.isAssignableFrom( o.getClass() ) ) )
{
log( "Class " + o.getClass() + " is not a subclass of " + requiredClass, Project.MSG_VERBOSE );
String msg = ref.getRefId() + " doesn\'t denote a " + dataTypeName;
throw new BuildException( msg );
}
return o;
}
}