org.codehaus.mojo.apt.AbstractAptMojo Maven / Gradle / Ivy
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Maven Plugin for Annotation Processing Tool (apt).
package org.codehaus.mojo.apt;
/*
* The MIT License
*
* Copyright 2006-2008 The Codehaus.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.DependencyResolutionRequiredException;
import org.apache.maven.model.Resource;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.compiler.util.scan.InclusionScanException;
import org.codehaus.plexus.compiler.util.scan.SimpleSourceInclusionScanner;
import org.codehaus.plexus.compiler.util.scan.SourceInclusionScanner;
import org.codehaus.plexus.compiler.util.scan.StaleSourceScanner;
import org.codehaus.plexus.compiler.util.scan.mapping.SingleTargetSourceMapping;
import org.codehaus.plexus.compiler.util.scan.mapping.SuffixMapping;
import org.codehaus.plexus.util.StringUtils;
/**
* Base mojo for executing apt.
*
* @author Juraj Burian
* @author Mark Hobson
* @version $Id: AbstractAptMojo.java 7030 2008-05-22 09:39:09Z mark $
*/
public abstract class AbstractAptMojo extends AbstractMojo
{
// read-only parameters ---------------------------------------------------
/**
* The maven project.
*
* @parameter expression="${project}"
* @required
* @readonly
*/
private MavenProject project;
/**
* The plugin's artifacts.
*
* @parameter expression="${plugin.artifacts}"
* @required
* @readonly
*/
private List pluginArtifacts;
/**
* The directory to run apt from when forked.
*
* @parameter expression="${basedir}"
* @required
* @readonly
*/
private File workingDirectory;
// configurable parameters ------------------------------------------------
/**
* Whether to run apt in a separate process.
*
* @parameter default-value="false"
*/
private boolean fork;
/**
* The apt executable to use when forked.
*
* @parameter expression="${maven.apt.executable}" default-value="apt"
*/
private String executable;
/**
* The initial size of the memory allocation pool when forked, for example 64m.
*
* @parameter
*/
private String meminitial;
/**
* The maximum size of the memory allocation pool when forked, for example 128m.
*
* @parameter
*/
private String maxmem;
/**
* Whether to show apt warnings. This is opposite to the -nowarn argument for apt.
*
* @parameter expression="${maven.apt.showWarnings}" default-value="false"
*/
private boolean showWarnings;
/**
* The source file encoding name, such as EUC-JP and UTF-8. If encoding is not
* specified, the encoding ISO-8859-1 is used rather than the platform default for reproducibility
* reasons. This is equivalent to the -encoding argument for apt.
*
* @parameter expression="${maven.apt.encoding}" default-value="ISO-8859-1"
*/
private String encoding;
/**
* Whether to output information about each class loaded and each source file processed. This is equivalent to the
* -verbose argument for apt.
*
* @parameter expression="${maven.apt.verbose}" default-value="false"
*/
private boolean verbose;
/**
* Options to pass to annotation processors. These are equivalent to multiple -A arguments for apt.
*
* @parameter
*/
private String[] options;
/**
* Name of AnnotationProcessorFactory to use; bypasses default discovery process. This is equivalent
* to the -factory argument for apt.
*
* @parameter expression="${maven.apt.factory}"
*/
private String factory;
/**
* The source directories containing any additional sources to be processed.
*
* @parameter
*/
private List additionalSourceRoots;
/**
* The path for processor-generated resources.
*
* @parameter
*/
private String resourceTargetPath;
/**
* Whether resource filtering is enabled for processor-generated resources.
*
* @parameter default-value="false"
*/
private boolean resourceFiltering;
/**
* Force apt processing without staleness checking. When false, use outputFiles or
* outputFileEndings to control computing staleness.
*
* @parameter default-value="false"
*/
private boolean force;
/**
* The filenames of processor-generated files to examine when computing staleness. For example,
* generated.xml would specify that the processor creates the aforementioned single file from all
* .java source files. When this parameter is not specified, outputFileEndings is used
* instead.
*
* @parameter
*/
private Set outputFiles;
/**
* The filename endings of processor-generated files to examine when computing staleness. For example,
* .txt would specify that the processor creates a corresponding .txt file for every
* .java source file. Default value is .java. Note that this parameter has no effect if
* outputFiles is specified.
*
* @parameter
*/
private Set outputFileEndings;
/**
* Sets the granularity in milliseconds of the last modification date for testing whether a source needs
* processing.
*
* @parameter expression="${maven.apt.staleMillis}" default-value="0"
*/
private int staleMillis;
/**
* Whether to bypass running apt.
*
* @parameter expression="${maven.apt.skip}" default-value="false"
*/
private boolean skip;
// fields -----------------------------------------------------------------
private Set includes;
private Set excludes;
// Mojo methods -----------------------------------------------------------
/**
* {@inheritDoc}
*/
public final void execute() throws MojoExecutionException
{
if ( skip )
{
getLog().info( "Skipping apt" );
}
else
{
executeImpl();
}
}
// protected methods ------------------------------------------------------
protected void executeImpl() throws MojoExecutionException
{
// apply defaults
includes = CollectionUtils.defaultSet( getIncludes(), Collections.singleton( "**/*.java" ) );
excludes = CollectionUtils.defaultSet( getExcludes() );
// invoke apt
List staleSourceFiles = getSourceFiles( getStaleScanner(), "stale sources" );
if ( staleSourceFiles.isEmpty() )
{
getLog().info( "Nothing to process - all processor-generated files are up to date" );
}
else
{
executeApt();
}
// add source root
getCompileSourceRoots().add( getOutputDirectory().getPath() );
// add resource
Resource resource = new Resource();
resource.setDirectory( getOutputDirectory().getPath() );
resource.addExclude( "**/*.java" );
resource.setFiltering( resourceFiltering );
if ( resourceTargetPath != null )
{
resource.setTargetPath( resourceTargetPath );
}
getResources().add( resource );
}
/**
* Gets the Maven project.
*
* @return the project
*/
protected MavenProject getProject()
{
return project;
}
/**
* Gets the options to pass to annotation processors.
*
* @return an array of options to pass to annotation processors
*/
protected String[] getOptions()
{
return options;
}
/**
* The source directories containing the sources to be processed.
*
* @return list of compilation source roots
*/
protected abstract List getCompileSourceRoots();
/**
* Gets the project's resources.
*
* @return the project's resources
*/
protected abstract List getResources();
/**
* Gets the project's classpath.
*
* @return a list of classpath elements
*/
protected abstract List getClasspathElements();
/**
* Gets a set of inclusion filters for apt.
*
* @return a set of inclusion filters
*/
protected abstract Set getIncludes();
/**
* Gets a set of exclusion filters for apt.
*
* @return a set of exclusion filters
*/
protected abstract Set getExcludes();
/**
* The directory root under which processor-generated source files will be placed; files are placed in
* subdirectories based on package namespace.
*
* @return the directory root under which processor-generated source files will be placed
*/
protected abstract File getOutputDirectory();
// private methods --------------------------------------------------------
private void executeApt() throws MojoExecutionException
{
List sourceFiles = getSourceFiles( getSourceScanner(), "sources" );
if ( getLog().isInfoEnabled() )
{
int count = sourceFiles.size();
getLog().info( "Processing " + count + " source file" + ( count == 1 ? "" : "s" ) + " to "
+ getOutputDirectory().getAbsolutePath() );
}
List args = createArgs( sourceFiles );
boolean success;
if ( fork )
{
success = AptUtils.invokeForked( getLog(), workingDirectory, executable, meminitial, maxmem, args );
}
else
{
success = AptUtils.invoke( getLog(), args );
}
if ( !success )
{
throw new MojoExecutionException( "Apt failed" );
}
}
private List createArgs( List sourceFiles ) throws MojoExecutionException
{
List args = new ArrayList();
// javac arguments
Set classpathElements = new LinkedHashSet();
classpathElements.addAll( getPluginClasspathElements() );
classpathElements.addAll( getClasspathElements() );
if ( !classpathElements.isEmpty() )
{
args.add( "-classpath" );
args.add( toPath( classpathElements ) );
}
List sourcePaths = getSourcePaths();
if ( !sourcePaths.isEmpty() )
{
args.add( "-sourcepath" );
args.add( toPath( sourcePaths ) );
}
if ( !showWarnings )
{
args.add( "-nowarn" );
}
if ( encoding != null )
{
args.add( "-encoding" );
args.add( encoding );
}
if ( verbose )
{
args.add( "-verbose" );
}
// apt arguments
args.add( "-s" );
args.add( getOutputDirectory().getAbsolutePath() );
// never compile
args.add( "-nocompile" );
if ( options != null )
{
for ( String option : options )
{
args.add( "-A" + option.trim() );
}
}
if ( StringUtils.isNotEmpty( factory ) )
{
args.add( "-factory" );
args.add( factory );
}
// source files
for ( File file : sourceFiles )
{
args.add( file.getAbsolutePath() );
}
return args;
}
private static String toPath( Collection paths )
{
StringBuffer buffer = new StringBuffer();
for ( Iterator iterator = paths.iterator(); iterator.hasNext(); )
{
buffer.append( iterator.next() );
if ( iterator.hasNext() )
{
buffer.append( File.pathSeparator );
}
}
return buffer.toString();
}
private List getPluginClasspathElements() throws MojoExecutionException
{
try
{
return MavenProjectUtils.getClasspathElements( project, pluginArtifacts );
}
catch ( DependencyResolutionRequiredException exception )
{
throw new MojoExecutionException( "Cannot get plugin classpath elements", exception );
}
}
private List getSourcePaths()
{
List sourcePaths = new ArrayList();
sourcePaths.addAll( getCompileSourceRoots() );
if ( additionalSourceRoots != null )
{
sourcePaths.addAll( additionalSourceRoots );
}
return sourcePaths;
}
private List getSourceFiles( SourceInclusionScanner scanner, String name ) throws MojoExecutionException
{
List sourceFiles = new ArrayList();
for ( String path : getSourcePaths() )
{
File sourceDir = new File( path );
sourceFiles.addAll( getSourceFiles( scanner, name, sourceDir ) );
}
return sourceFiles;
}
private Set getSourceFiles( SourceInclusionScanner scanner, String name, File sourceDir )
throws MojoExecutionException
{
Set sources;
if ( sourceDir.isDirectory() )
{
try
{
Set rawSources = scanner.getIncludedSources( sourceDir, getOutputDirectory() );
sources = CollectionUtils.genericSet( rawSources, File.class );
}
catch ( InclusionScanException exception )
{
throw new MojoExecutionException( "Error scanning source directory: " + sourceDir, exception );
}
}
else
{
sources = Collections.emptySet();
}
if ( getLog().isDebugEnabled() )
{
if ( sources.isEmpty() )
{
getLog().debug( "No " + name + " found in " + sourceDir );
}
else
{
getLog().debug( StringUtils.capitalizeFirstLetter( name ) + " found in " + sourceDir + ":" );
LogUtils.log( getLog(), LogUtils.LEVEL_DEBUG, sources, " " );
}
}
return sources;
}
private SourceInclusionScanner getStaleScanner()
{
// create scanner
SourceInclusionScanner scanner;
if ( force )
{
if ( !CollectionUtils.isEmpty( outputFiles ) || !CollectionUtils.isEmpty( outputFileEndings ) )
{
getLog().warn( "Not using staleness checking - ignoring outputFiles and outputFileEndings" );
}
getLog().debug( "Processing all source files" );
scanner = createSimpleScanner();
}
else
{
scanner = new StaleSourceScanner( staleMillis, includes, excludes );
if ( !CollectionUtils.isEmpty( outputFiles ) )
{
if ( !CollectionUtils.isEmpty( outputFileEndings ) )
{
getLog().warn( "Both outputFiles and outputFileEndings specified - using outputFiles" );
}
getLog().debug( "Computing stale sources against target files " + outputFiles );
for ( String file : outputFiles )
{
scanner.addSourceMapping( new SingleTargetSourceMapping( ".java", file ) );
}
}
else
{
Set suffixes = CollectionUtils.defaultSet( outputFileEndings, Collections.singleton( ".java" ) );
getLog().debug( "Computing stale sources against target file endings " + suffixes );
scanner.addSourceMapping( new SuffixMapping( ".java", suffixes ) );
}
}
return scanner;
}
private SourceInclusionScanner getSourceScanner()
{
SourceInclusionScanner scanner;
if ( force || CollectionUtils.isEmpty( outputFiles ) )
{
scanner = getStaleScanner();
}
else
{
scanner = createSimpleScanner();
}
return scanner;
}
private SourceInclusionScanner createSimpleScanner()
{
SourceInclusionScanner scanner = new SimpleSourceInclusionScanner( includes, excludes );
// dummy mapping required to function
scanner.addSourceMapping( new SuffixMapping( "", "" ) );
return scanner;
}
}