/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
*
* 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.
*/
package hudson.maven;
import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.plugin.Mojo;
import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.codehaus.classworlds.ClassRealm;
import org.codehaus.plexus.configuration.PlexusConfiguration;
import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
import org.codehaus.plexus.component.configurator.converters.lookup.ConverterLookup;
import org.codehaus.plexus.component.configurator.converters.lookup.DefaultConverterLookup;
import org.codehaus.plexus.component.configurator.converters.ConfigurationConverter;
import org.codehaus.plexus.component.configurator.ComponentConfigurationException;
import java.io.File;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.lang.reflect.Method;
import hudson.util.InvocationInterceptor;
import hudson.util.ReflectionUtils;
/**
* Information about Mojo to be executed. This object provides
* convenient access to various mojo information, so that {@link MavenReporter}
* implementations are shielded to some extent from Maven internals.
*
* <p>
* For each mojo to be executed, this object is created and passed to
* {@link MavenReporter}.
*
* @author Kohsuke Kawaguchi
* @see MavenReporter
* @see MavenReportInfo
*/
public class MojoInfo {
/**
* Object from Maven that describes the Mojo to be executed.
*/
public final MojoExecution mojoExecution;
/**
* PluginName of the plugin that contains this mojo.
*/
public final PluginName pluginName;
/**
* Mojo object that carries out the actual execution.
*/
public final Mojo mojo;
/**
* Configuration of the mojo for the current execution.
* This reflects the default values, as well as values configured from POM,
* including inherited values.
*/
public final PlexusConfiguration configuration;
/**
* Object that Maven uses to resolve variables like "${project}" to its
* corresponding object.
*/
public final ExpressionEvaluator expressionEvaluator;
/**
* Used to obtain a value from {@link PlexusConfiguration} as a typed object,
* instead of String.
*/
private final ConverterLookup converterLookup = new DefaultConverterLookup();
public MojoInfo(MojoExecution mojoExecution, Mojo mojo, PlexusConfiguration configuration, ExpressionEvaluator expressionEvaluator) {
this.mojo = mojo;
this.mojoExecution = mojoExecution;
this.configuration = configuration;
this.expressionEvaluator = expressionEvaluator;
this.pluginName = new PluginName(mojoExecution.getMojoDescriptor().getPluginDescriptor());
}
/**
* Gets the goal name of the mojo to be executed,
* such as "javadoc". This is local to the plugin name.
*/
public String getGoal() {
return mojoExecution.getMojoDescriptor().getGoal();
}
/**
* Obtains the configuration value of the mojo.
*
* @param configName
* The name of the child element in the <configuration> of mojo.
* @param type
* The Java class of the configuration value. While every element
* can be read as {@link String}, often different types have a different
* conversion rules associated with it (for example, {@link File} would
* resolve relative path against POM base directory.)
*
* @return
* The configuration value either specified in POM, or inherited from
* parent POM, or default value if one is specified in mojo.
*
* @throws ComponentConfigurationException
* Not sure when exactly this is thrown, but it's probably when
* the configuration in POM is syntactically incorrect.
*/
public <T> T getConfigurationValue(String configName, Class<T> type) throws ComponentConfigurationException {
PlexusConfiguration child = configuration.getChild(configName);
if(child==null) return null; // no such config
ClassLoader cl = null;
PluginDescriptor pd = mojoExecution.getMojoDescriptor().getPluginDescriptor();
// for maven2 builds ClassRealm doesn't extends ClassLoader !
// so check stuff with reflection
Method method = ReflectionUtils.getPublicMethodNamed( pd.getClass(), "getClassRealm" );
if ( ReflectionUtils.invokeMethod( method, pd ) instanceof ClassRealm)
{
ClassRealm cr = (ClassRealm) ReflectionUtils.invokeMethod( method, pd );
cl = cr.getClassLoader();
} else {
cl = mojoExecution.getMojoDescriptor().getPluginDescriptor().getClassRealm();
}
ConfigurationConverter converter = converterLookup.lookupConverterForType(type);
return type.cast(converter.fromConfiguration(converterLookup,child,type,
// the implementation seems to expect the type of the bean for which the configuration is done
// in this parameter, but we have no such type. So passing in a dummy
Object.class,
cl,
expressionEvaluator));
}
/**
* Returns true if this {@link MojoInfo} wraps the mojo of the given ID tuple.
*/
public boolean is(String groupId, String artifactId, String mojoName) {
return pluginName.matches(groupId,artifactId) && getGoal().equals(mojoName);
}
/**
* Injects the specified value (designated by the specified field name) into the mojo,
* and returns its old value.
*
* @throws NoSuchFieldException
* if the mojo doesn't have any field of the given name.
* @since 1.232
*/
public <T> T inject(String name, T value) throws NoSuchFieldException {
for(Class c=mojo.getClass(); c!=Object.class; c=c.getSuperclass()) {
try {
Field f = c.getDeclaredField(name);
f.setAccessible(true);
Object oldValue = f.get(mojo);
f.set(mojo,value);
} catch (NoSuchFieldException e) {
continue;
} catch (IllegalAccessException e) {
// shouldn't happen because we made it accessible
IllegalAccessError x = new IllegalAccessError(e.getMessage());
x.initCause(e);
throw x;
}
}
throw new NoSuchFieldException(name);
}
/**
* Intercept the invocation from the mojo to its injected component (designated by the given field name.)
*
* <p>
* Often for a {@link MavenReporter} to really figure out what's going on in a build, you'd like
* to intercept one of the components that Maven is injecting into the mojo, and inspect its parameter
* and return values.
*
* <p>
* This mehod provides a way to do this. You specify the name of the field in the Mojo class that receives
* the injected component, then pass in {@link InvocationInterceptor}, which will in turn be invoked
* for every invocation on that component.
*
* @throws NoSuchFieldException
* if the specified field is not found on the mojo class, or it is found but the type is not an interface.
* @since 1.232
*/
public void intercept(String fieldName, final InvocationInterceptor interceptor) throws NoSuchFieldException {
for(Class c=mojo.getClass(); c!=Object.class; c=c.getSuperclass()) {
Field f;
try {
f = c.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
continue;
}
f.setAccessible(true);
Class<?> type = f.getType();
if(!type.isInterface())
throw new NoSuchFieldException(fieldName+" is of type "+type+" and it's not an interface");
try {
final Object oldObject = f.get(mojo);
Object newObject = Proxy.newProxyInstance(type.getClassLoader(), new Class[]{type}, new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
return interceptor.invoke(proxy,method,args,new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
return method.invoke(oldObject,args);
}
});
}
});
f.set(mojo,newObject);
} catch (IllegalAccessException e) {
// shouldn't happen because we made it accessible
IllegalAccessError x = new IllegalAccessError(e.getMessage());
x.initCause(e);
throw x;
}
}
}
}