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package org.apache.maven.plugin;
/*
* 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.Properties;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.descriptor.MojoDescriptor;
import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.path.PathTranslator;
import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
import org.codehaus.plexus.component.configurator.expression.TypeAwareExpressionEvaluator;
import org.codehaus.plexus.logging.Logger;
import org.codehaus.plexus.util.introspection.ReflectionValueExtractor;
/**
* Evaluator for plugin parameters expressions. Content surrounded by ${ and } is evaluated.
* Recognized values are:
*
*
Expression matrix
*
expression
evaluation result
*
session
the actual {@link MavenSession}
*
session.*
(since Maven 3)
*
localRepository
*
{@link MavenSession#getLocalRepository()}
*
reactorProjects
{@link MavenSession#getProjects()}
*
repositorySystemSession
(since Maven 3)
*
{@link MavenSession#getRepositorySession()}
*
project
*
{@link MavenSession#getCurrentProject()}
*
project.*
*
pom.*
(since Maven 3)
same as project.*
*
executedProject
*
{@link MavenProject#getExecutionProject()}
*
settings
{@link MavenSession#getSettings()}
*
settings.*
*
basedir
*
{@link MavenSession#getExecutionRootDirectory()} or
* System.getProperty( "user.dir" ) if null
* Notice:reports was supported in Maven 2.x but was removed in Maven 3
*
* @author Jason van Zyl
* @see MavenSession
* @see MojoExecution
*/
public class PluginParameterExpressionEvaluator
implements TypeAwareExpressionEvaluator
{
private MavenSession session;
private MojoExecution mojoExecution;
private MavenProject project;
private String basedir;
private Properties properties;
@Deprecated //TODO used by the Enforcer plugin
public PluginParameterExpressionEvaluator( MavenSession session, MojoExecution mojoExecution,
PathTranslator pathTranslator, Logger logger, MavenProject project,
Properties properties )
{
this( session, mojoExecution );
}
public PluginParameterExpressionEvaluator( MavenSession session )
{
this( session, null );
}
public PluginParameterExpressionEvaluator( MavenSession session, MojoExecution mojoExecution )
{
this.session = session;
this.mojoExecution = mojoExecution;
this.properties = new Properties();
this.project = session.getCurrentProject();
//
// Maven4: We may want to evaluate how this is used but we add these separate as the
// getExecutionProperties is deprecated in MavenSession.
//
this.properties.putAll( session.getUserProperties() );
this.properties.putAll( session.getSystemProperties() );
String basedir = null;
if ( project != null )
{
File projectFile = project.getBasedir();
// this should always be the case for non-super POM instances...
if ( projectFile != null )
{
basedir = projectFile.getAbsolutePath();
}
}
if ( basedir == null )
{
basedir = session.getExecutionRootDirectory();
}
if ( basedir == null )
{
basedir = System.getProperty( "user.dir" );
}
this.basedir = basedir;
}
@Override
public Object evaluate( String expr )
throws ExpressionEvaluationException
{
return evaluate( expr, null );
}
@Override
@SuppressWarnings( "checkstyle:methodlength" )
public Object evaluate( String expr, Class type )
throws ExpressionEvaluationException
{
Object value = null;
if ( expr == null )
{
return null;
}
String expression = stripTokens( expr );
if ( expression.equals( expr ) )
{
int index = expr.indexOf( "${" );
if ( index >= 0 )
{
int lastIndex = expr.indexOf( '}', index );
if ( lastIndex >= 0 )
{
String retVal = expr.substring( 0, index );
if ( ( index > 0 ) && ( expr.charAt( index - 1 ) == '$' ) )
{
retVal += expr.substring( index + 1, lastIndex + 1 );
}
else
{
Object subResult = evaluate( expr.substring( index, lastIndex + 1 ) );
if ( subResult != null )
{
retVal += subResult;
}
else
{
retVal += "$" + expr.substring( index + 1, lastIndex + 1 );
}
}
retVal += evaluate( expr.substring( lastIndex + 1 ) );
return retVal;
}
}
// Was not an expression
if ( expression.contains( "$$" ) )
{
return expression.replaceAll( "\\$\\$", "\\$" );
}
else
{
return expression;
}
}
MojoDescriptor mojoDescriptor = mojoExecution.getMojoDescriptor();
if ( "localRepository".equals( expression ) )
{
value = session.getLocalRepository();
}
else if ( "session".equals( expression ) )
{
value = session;
}
else if ( expression.startsWith( "session" ) )
{
try
{
int pathSeparator = expression.indexOf( '/' );
if ( pathSeparator > 0 )
{
String pathExpression = expression.substring( 1, pathSeparator );
value = ReflectionValueExtractor.evaluate( pathExpression, session );
value = value + expression.substring( pathSeparator );
}
else
{
value = ReflectionValueExtractor.evaluate( expression.substring( 1 ), session );
}
}
catch ( Exception e )
{
// TODO don't catch exception
throw new ExpressionEvaluationException( "Error evaluating plugin parameter expression: " + expression,
e );
}
}
else if ( "reactorProjects".equals( expression ) )
{
value = session.getProjects();
}
else if ( "mojoExecution".equals( expression ) )
{
value = mojoExecution;
}
else if ( "project".equals( expression ) )
{
value = project;
}
else if ( "executedProject".equals( expression ) )
{
value = project.getExecutionProject();
}
else if ( expression.startsWith( "project" ) || expression.startsWith( "pom" ) )
{
try
{
int pathSeparator = expression.indexOf( '/' );
if ( pathSeparator > 0 )
{
String pathExpression = expression.substring( 0, pathSeparator );
value = ReflectionValueExtractor.evaluate( pathExpression, project );
value = value + expression.substring( pathSeparator );
}
else
{
value = ReflectionValueExtractor.evaluate( expression.substring( 1 ), project );
}
}
catch ( Exception e )
{
// TODO don't catch exception
throw new ExpressionEvaluationException( "Error evaluating plugin parameter expression: " + expression,
e );
}
}
else if ( expression.equals( "repositorySystemSession" ) )
{
value = session.getRepositorySession();
}
else if ( expression.equals( "mojo" ) )
{
value = mojoExecution;
}
else if ( expression.startsWith( "mojo" ) )
{
try
{
int pathSeparator = expression.indexOf( '/' );
if ( pathSeparator > 0 )
{
String pathExpression = expression.substring( 1, pathSeparator );
value = ReflectionValueExtractor.evaluate( pathExpression, mojoExecution );
value = value + expression.substring( pathSeparator );
}
else
{
value = ReflectionValueExtractor.evaluate( expression.substring( 1 ), mojoExecution );
}
}
catch ( Exception e )
{
// TODO don't catch exception
throw new ExpressionEvaluationException( "Error evaluating plugin parameter expression: " + expression,
e );
}
}
else if ( expression.equals( "plugin" ) )
{
value = mojoDescriptor.getPluginDescriptor();
}
else if ( expression.startsWith( "plugin" ) )
{
try
{
int pathSeparator = expression.indexOf( '/' );
PluginDescriptor pluginDescriptor = mojoDescriptor.getPluginDescriptor();
if ( pathSeparator > 0 )
{
String pathExpression = expression.substring( 1, pathSeparator );
value = ReflectionValueExtractor.evaluate( pathExpression, pluginDescriptor );
value = value + expression.substring( pathSeparator );
}
else
{
value = ReflectionValueExtractor.evaluate( expression.substring( 1 ), pluginDescriptor );
}
}
catch ( Exception e )
{
throw new ExpressionEvaluationException( "Error evaluating plugin parameter expression: " + expression,
e );
}
}
else if ( "settings".equals( expression ) )
{
value = session.getSettings();
}
else if ( expression.startsWith( "settings" ) )
{
try
{
int pathSeparator = expression.indexOf( '/' );
if ( pathSeparator > 0 )
{
String pathExpression = expression.substring( 1, pathSeparator );
value = ReflectionValueExtractor.evaluate( pathExpression, session.getSettings() );
value = value + expression.substring( pathSeparator );
}
else
{
value = ReflectionValueExtractor.evaluate( expression.substring( 1 ), session.getSettings() );
}
}
catch ( Exception e )
{
// TODO don't catch exception
throw new ExpressionEvaluationException( "Error evaluating plugin parameter expression: " + expression,
e );
}
}
else if ( "basedir".equals( expression ) )
{
value = basedir;
}
else if ( expression.startsWith( "basedir" ) )
{
int pathSeparator = expression.indexOf( '/' );
if ( pathSeparator > 0 )
{
value = basedir + expression.substring( pathSeparator );
}
}
/*
* MNG-4312: We neither have reserved all of the above magic expressions nor is their set fixed/well-known (it
* gets occasionally extended by newer Maven versions). This imposes the risk for existing plugins to
* unintentionally use such a magic expression for an ordinary system property. So here we check whether we
* ended up with a magic value that is not compatible with the type of the configured mojo parameter (a string
* could still be converted by the configurator so we leave those alone). If so, back off to evaluating the
* expression from properties only.
*/
if ( value != null && type != null && !( value instanceof String ) && !isTypeCompatible( type, value ) )
{
value = null;
}
if ( value == null )
{
// The CLI should win for defining properties
if ( properties != null )
{
// We will attempt to get nab a system property as a way to specify a
// parameter to a plugins. My particular case here is allowing the surefire
// plugin to run a single test so I want to specify that class on the cli
// as a parameter.
value = properties.getProperty( expression );
}
if ( ( value == null ) && ( ( project != null ) && ( project.getProperties() != null ) ) )
{
value = project.getProperties().getProperty( expression );
}
}
if ( value instanceof String )
{
// TODO without #, this could just be an evaluate call...
String val = (String) value;
int exprStartDelimiter = val.indexOf( "${" );
if ( exprStartDelimiter >= 0 )
{
if ( exprStartDelimiter > 0 )
{
value = val.substring( 0, exprStartDelimiter ) + evaluate( val.substring( exprStartDelimiter ) );
}
else
{
value = evaluate( val.substring( exprStartDelimiter ) );
}
}
}
return value;
}
private static boolean isTypeCompatible( Class type, Object value )
{
if ( type.isInstance( value ) )
{
return true;
}
// likely Boolean -> boolean, Short -> int etc. conversions, it's not the problem case we try to avoid
return ( ( type.isPrimitive() || type.getName().startsWith( "java.lang." ) )
&& value.getClass().getName().startsWith( "java.lang." ) );
}
private String stripTokens( String expr )
{
if ( expr.startsWith( "${" ) && ( expr.indexOf( '}' ) == expr.length() - 1 ) )
{
expr = expr.substring( 2, expr.length() - 1 );
}
return expr;
}
@Override
public File alignToBaseDirectory( File file )
{
// TODO Copied from the DefaultInterpolator. We likely want to resurrect the PathTranslator or at least a
// similar component for re-usage
if ( file != null )
{
if ( file.isAbsolute() )
{
// path was already absolute, just normalize file separator and we're done
}
else if ( file.getPath().startsWith( File.separator ) )
{
// drive-relative Windows path, don't align with project directory but with drive root
file = file.getAbsoluteFile();
}
else
{
// an ordinary relative path, align with project directory
file = new File( new File( basedir, file.getPath() ).toURI().normalize() ).getAbsoluteFile();
}
}
return file;
}
}
