package org.apache.maven.shared.io.scan;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
import java.io.File;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.maven.shared.io.scan.mapping.SourceMapping;
/**
* @author jdcasey
* @version $Id$
*/
public class StaleResourceScanner
extends AbstractResourceInclusionScanner
{
private final long lastUpdatedWithinMsecs;
private final Set<String> sourceIncludes;
private final Set<String> sourceExcludes;
// ----------------------------------------------------------------------
//
// ----------------------------------------------------------------------
/**
* Create instance with defaults.
*/
public StaleResourceScanner()
{
this( 0, Collections.singleton( "**/*" ), Collections.<String>emptySet() );
}
/**
* @param lastUpdatedWithinMsecs last update within milli seconds.
*/
public StaleResourceScanner( long lastUpdatedWithinMsecs )
{
this( lastUpdatedWithinMsecs, Collections.singleton( "**/*" ), Collections.<String>emptySet() );
}
/**
* @param lastUpdatedWithinMsecs last update within milli seconds.
* @param sourceIncludes source includes.
* @param sourceExcludes source excludes.
*/
public StaleResourceScanner( long lastUpdatedWithinMsecs, Set<String> sourceIncludes, Set<String> sourceExcludes )
{
this.lastUpdatedWithinMsecs = lastUpdatedWithinMsecs;
this.sourceIncludes = sourceIncludes;
this.sourceExcludes = sourceExcludes;
}
// ----------------------------------------------------------------------
// SourceInclusionScanner Implementation
// ----------------------------------------------------------------------
/** {@inheritDoc} */
public Set<File> getIncludedSources( File sourceDir, File targetDir )
throws InclusionScanException
{
List<SourceMapping> srcMappings = getSourceMappings();
if ( srcMappings.isEmpty() )
{
return Collections.<File>emptySet();
}
String[] potentialIncludes = scanForSources( sourceDir, sourceIncludes, sourceExcludes );
Set<File> matchingSources = new HashSet<File>();
for ( int i = 0; i < potentialIncludes.length; i++ )
{
String path = potentialIncludes[i];
File sourceFile = new File( sourceDir, path );
staleSourceFileTesting: for ( SourceMapping mapping : srcMappings )
{
Set<File> targetFiles = mapping.getTargetFiles( targetDir, path );
// never include files that don't have corresponding target mappings.
// the targets don't have to exist on the filesystem, but the
// mappers must tell us to look for them.
for ( File targetFile : targetFiles )
{
if ( !targetFile.exists()
|| ( targetFile.lastModified() + lastUpdatedWithinMsecs < sourceFile.lastModified() ) )
{
matchingSources.add( sourceFile );
break staleSourceFileTesting;
}
}
}
}
return matchingSources;
}
}