org.codehaus.mojo.license.model.LicenseRepository Maven / Gradle / Ivy
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Maven plugin to download and collect license files from project dependencies.
package org.codehaus.mojo.license.model;
/*
* #%L
* License Maven Plugin
* %%
* Copyright (C) 2008 - 2011 CodeLutin, Codehaus, Tony Chemit
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.codehaus.mojo.license.utils.MojoHelper;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author tchemit [email protected]
* @since 1.0
*/
public class LicenseRepository
implements Iterable
{
/**
* Logger.
*/
private static final Log LOG = LogFactory.getLog( LicenseRepository.class );
public static final String REPOSITORY_DEFINITION_FILE = "licenses.properties";
public static final Pattern LICENSE_DESCRIPTION_PATTERN =
Pattern.compile( "(.*)\\s*~~\\s*license\\s*:\\s*(.*)\\s*~~\\s*header\\s*:\\s*(.*)\\s*" );
/**
* the base url of the licenses repository.
*/
protected URL baseURL;
/**
* licenses of this repository.
*/
protected List licenses;
/**
* flag to known if repository was init (pass to {@code true} when invoking
* the method {@link #load()}).
*/
protected boolean init;
public URL getBaseURL()
{
return baseURL;
}
public void setBaseURL( URL baseURL )
{
checkNotInit( "setBaseURL" );
this.baseURL = baseURL;
}
protected URL getDefinitionURL()
{
if ( baseURL == null || StringUtils.isEmpty( baseURL.toString() ) )
{
throw new IllegalStateException( "no baseURL defined in " + this );
}
URL definitionURL = MojoHelper.getUrl( getBaseURL(), REPOSITORY_DEFINITION_FILE );
return definitionURL;
}
protected URL getLicenseBaseURL( String licenseName )
{
URL licenseBaseURL = MojoHelper.getUrl( baseURL, licenseName );
return licenseBaseURL;
}
public void load()
throws IOException
{
checkNotInit( "load" );
try
{
URL definitionURL = getDefinitionURL();
if ( licenses != null )
{
licenses.clear();
}
else
{
licenses = new ArrayList<>();
}
if ( !checkExists( definitionURL ) )
{
throw new IllegalArgumentException(
"no licenses.properties found with url [" + definitionURL + "] for resolver " + this );
}
Properties p = new Properties();
p.load( definitionURL.openStream() );
for ( Entry entry : p.entrySet() )
{
String licenseName = (String) entry.getKey();
licenseName = licenseName.trim().toLowerCase();
URL licenseBaseURL = getLicenseBaseURL( licenseName );
License license = new License();
license.setName( licenseName );
license.setBaseURL( licenseBaseURL );
String licenseDescription = (String) entry.getValue();
Matcher matcher = LICENSE_DESCRIPTION_PATTERN.matcher( licenseDescription );
String licenseFile;
String headerFile;
if ( matcher.matches() )
{
licenseDescription = matcher.group( 1 ).trim();
licenseFile = matcher.group( 2 ).trim();
headerFile = matcher.group( 3 ).trim();
}
else
{
licenseFile = License.LICENSE_CONTENT_FILE;
headerFile = License.LICENSE_HEADER_FILE;
}
URL licenseFileURL = getFileURL( license, licenseFile );
license.setLicenseURL( licenseFileURL );
URL headerFileURL = getFileURL( license, headerFile );
license.setHeaderURL( headerFileURL );
license.setDescription( licenseDescription );
if ( LOG.isInfoEnabled() )
{
LOG.info( "register " + license.getDescription() );
}
if ( LOG.isDebugEnabled() )
{
LOG.debug( license );
}
licenses.add( license );
}
licenses = Collections.unmodifiableList( licenses );
}
finally
{
// mark repository as available
init = true;
}
}
public String[] getLicenseNames()
{
checkInit( "getLicenseNames" );
List result = new ArrayList<>( licenses.size() );
for ( License license : this )
{
result.add( license.getName() );
}
return result.toArray( new String[result.size()] );
}
public License[] getLicenses()
{
checkInit( "getLicenses" );
return licenses.toArray( new License[licenses.size()] );
}
public License getLicense( String licenseName )
{
checkInit( "getLicense" );
if ( StringUtils.isEmpty( licenseName ) )
{
throw new IllegalArgumentException( "licenceName can not be null, nor empty" );
}
License license = null;
for ( License l : this )
{
if ( licenseName.equals( l.getName() ) )
{
// got it
license = l;
break;
}
}
return license;
}
/**
* {@inheritDoc}
*/
public Iterator iterator()
{
checkInit( "iterator" );
return licenses.iterator();
}
protected boolean checkExists( URL url )
throws IOException
{
URLConnection openConnection = url.openConnection();
return openConnection.getContentLength() > 0;
}
protected void checkInit( String operation )
{
if ( !init )
{
throw new IllegalStateException(
"repository " + this + " was not init, operation [" + operation + "] not possible." );
}
}
protected void checkNotInit( String operation )
{
if ( init )
{
throw new IllegalStateException(
"repository " + this + "was init, operation [" + operation + "+] not possible." );
}
}
protected URL getFileURL( License license, String filename )
throws IOException
{
URL licenseBaseURL = license.getBaseURL();
URL result = MojoHelper.getUrl( licenseBaseURL, filename );
if ( !checkExists( result ) )
{
// let's try with a .ftl suffix
URL resultWithFtlSuffix = MojoHelper.getUrl( licenseBaseURL, filename + License.TEMPLATE_SUFFIX );
if ( checkExists( resultWithFtlSuffix ) )
{
result = resultWithFtlSuffix;
}
else
{
throw new IllegalArgumentException(
"Could not find license (" + license + ") content file at [" + result + "], nor at ["
+ resultWithFtlSuffix + "] for resolver " + this );
}
}
return result;
}
}
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