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/*
* $Id$
* IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2001 Johannes Lehtinen
* Copyright 2002 Paul Wilkinson
* Copyright 2004 Gaganis Giorgos
*
*
* Licensed 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.
*/
package com.izforge.izpack.compiler;
import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.izforge.izpack.api.data.Pack;
import com.izforge.izpack.api.data.PackColor;
import com.izforge.izpack.api.data.binding.OsModel;
import com.izforge.izpack.api.data.binding.Stage;
import com.izforge.izpack.api.event.InstallationListener;
import com.izforge.izpack.api.event.InstallerListener;
import com.izforge.izpack.api.event.UninstallerListener;
import com.izforge.izpack.api.exception.CompilerException;
import com.izforge.izpack.api.exception.IzPackClassNotFoundException;
import com.izforge.izpack.compiler.helper.CompilerHelper;
import com.izforge.izpack.compiler.util.CompilerClassLoader;
import com.izforge.izpack.compiler.packager.IPackager;
import com.izforge.izpack.data.CustomData;
import com.izforge.izpack.data.PackInfo;
/**
* The IzPack compiler class. This is now a java bean style class that can be
* configured using the object representations of the install.xml
* configuration. The install.xml configuration is now handled by the
* CompilerConfig class.
*
* @author Julien Ponge
* @author Tino Schwarze
* @author Chadwick McHenry
* @see CompilerConfig
*/
public class Compiler extends Thread
{
/**
* Collects and packs files into installation jars, as told.
*/
private IPackager packager;
/**
* Error code, set to false if compilation succeeded.
*/
private boolean compileFailed = true;
/**
* Compiler helper.
*/
private final CompilerHelper compilerHelper;
/**
* The class loader.
*/
private final CompilerClassLoader loader;
/**
* The logger.
*/
private static final Logger logger = Logger.getLogger(Compiler.class.getName());
/**
* Constructs a Compiler.
*
* @param loader the class loader to use to load classes
* @param compilerHelper the compiler helper
*/
public Compiler(CompilerClassLoader loader, CompilerHelper compilerHelper)
{
this.loader = loader;
this.compilerHelper = compilerHelper;
}
/**
* Sets the packager.
*
* This must be set before invoking any other methods.
*
* @param packager the packager
*/
public void setPackager(IPackager packager)
{
this.packager = packager;
}
/**
* The run() method.
*/
@Override
public void run()
{
try
{
createInstaller();
}
catch (CompilerException ce)
{
logger.severe(ce.getMessage());
}
catch (Exception e)
{
logger.log(Level.SEVERE, e.getMessage(), e);
}
}
/**
* Compiles the installation.
*
* @throws Exception Description of the Exception
*/
public void createInstaller() throws Exception
{
// We ask the packager to create the installer
packager.createInstaller();
this.compileFailed = false;
}
/**
* Returns whether the installation was successful or not.
*
* @return whether the installation was successful or not
*/
public boolean wasSuccessful()
{
return !this.compileFailed;
}
/**
* Verifies dependencies between packs.
*
* @throws CompilerException if there are circular dependencies between packs, or a dependency doesn't exist
*/
public void checkDependencies() throws CompilerException
{
checkDependencies(packager.getPacksList());
}
/**
* Verifies that no two preselected packs have the same excludeGroup.
*
* @throws CompilerException if two preselected packs have the same excludeGroup
*/
public void checkExcludes() throws CompilerException
{
checkExcludes(packager.getPacksList());
}
/**
* Verifies that no two preselected packs have the same excludeGroup.
*
* @param packs list of packs which should be checked
* @throws CompilerException if two preselected packs have the same excludeGroup
*/
public void checkExcludes(List packs) throws CompilerException
{
for (int q = 0; q < packs.size(); q++)
{
PackInfo packinfo1 = packs.get(q);
Pack pack1 = packinfo1.getPack();
for (int w = 0; w < q; w++)
{
PackInfo packinfo2 = packs.get(w);
Pack pack2 = packinfo2.getPack();
if (pack1.getExcludeGroup() != null && pack2.getExcludeGroup() != null)
{
if (pack1.getExcludeGroup().equals(pack2.getExcludeGroup()))
{
if (pack1.isPreselected() && pack2.isPreselected())
{
error("Packs " + pack1.getName() + " and " + pack2.getName() +
" belong to the same excludeGroup " + pack1.getExcludeGroup() +
" and are both preselected. This is not allowed.");
}
}
}
}
}
}
/**
* Verifies dependencies between packs.
*
* @param packs the packs to check
* @throws CompilerException if there are circular dependencies between packs, or a dependency doesn't exist
*/
public void checkDependencies(List packs) throws CompilerException
{
// Because we use package names in the configuration file we associate
// the names with the objects
Map names = new HashMap();
for (PackInfo pack : packs)
{
names.put(pack.getPack().getName(), pack);
}
int result = dfs(packs, names);
// @todo More informative messages to include the source of the error
if (result == -2)
{
error("Circular dependency detected");
}
else if (result == -1)
{
error("A dependency doesn't exist");
}
}
/**
* We use the dfs graph search algorithm to check whether the graph is acyclic as described in:
* Thomas H. Cormen, Charles Leiserson, Ronald Rivest and Clifford Stein. Introduction to
* algorithms 2nd Edition 540-549,MIT Press, 2001
*
* @param packs The graph
* @param names The name map
* @return -2 if back edges exist, else 0
*/
private int dfs(List packs, Map names)
{
Map edges = new HashMap();
for (PackInfo pack : packs)
{
if (pack.colour == PackColor.WHITE)
{
if (dfsVisit(pack, names, edges) != 0)
{
return -1;
}
}
}
return checkBackEdges(edges);
}
/**
* This function checks for the existence of back edges.
*
* @param edges map to be checked
* @return -2 if back edges exist, else 0
*/
private int checkBackEdges(Map edges)
{
Set keys = edges.keySet();
for (final Edge key : keys)
{
PackColor color = edges.get(key);
if (color == PackColor.GREY)
{
return -2;
}
}
return 0;
}
/**
* This class is used for the classification of the edges
*/
private class Edge
{
PackInfo u;
PackInfo v;
Edge(PackInfo u, PackInfo v)
{
this.u = u;
this.v = v;
}
}
private int dfsVisit(PackInfo u, Map names, Map edges)
{
u.colour = PackColor.GREY;
List deps = u.getDependencies();
if (deps != null)
{
for (String name : deps)
{
PackInfo v = names.get(name);
if (v == null)
{
System.out.println("Failed to find dependency: " + name);
return -1;
}
Edge edge = new Edge(u, v);
if (edges.get(edge) == null)
{
edges.put(edge, v.colour);
}
if (v.colour == PackColor.WHITE)
{
final int result = dfsVisit(v, names, edges);
if (result != 0)
{
return result;
}
}
}
}
u.colour = PackColor.BLACK;
return 0;
}
/**
* Raises an exception.
*
* @param message a brief error message
* @throws CompilerException when invoked
*/
private void error(String message) throws CompilerException
{
compileFailed = true;
throw new CompilerException(message);
}
/**
* Adds a jar.
*
* @param url the JAR url
* @param uninstaller if true, include jar in the uninstaller
* @throws IOException if the jar cannot be read
*/
public void addJar(URL url, boolean uninstaller) throws IOException
{
loader.addURL(url);
List paths = compilerHelper.getContainedFilePaths(url);
if (uninstaller)
{
CustomData data = new CustomData(null, paths, null, CustomData.UNINSTALLER_JAR);
packager.addCustomJar(data, url);
}
else
{
packager.addJarContent(url);
}
}
/**
* Adds a listener to be invoked during installation or uninstallation.
*
* @param className the listener class name
* @param stage the stage when the listener is invoked
* @param constraints the list of constraints. May be null
* @throws IzPackClassNotFoundException if the class cannot be found
*/
public void addListener(String className, Stage stage, List constraints)
{
int type = (stage == Stage.install) ? CustomData.INSTALLER_LISTENER : CustomData.UNINSTALLER_LISTENER;
Class clazz;
if (stage == Stage.install)
{
clazz = loader.loadClass(className, InstallerListener.class);
}
else
{
clazz = loader.loadClass(className, UninstallerListener.class);
}
CustomData data = new CustomData(clazz.getName(), null, constraints, type);
packager.addCustomJar(data, null);
}
}
