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/*
 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.sun.tools.sjavac;

import java.io.File;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import com.sun.tools.javac.util.Assert;
import com.sun.tools.sjavac.pubapi.PubApi;

/**
 * The build state class captures the source code and generated artifacts
 * from a build. There are usually two build states, the previous one (prev),
 * loaded from the javac_state file, and the current one (now).
 *
 *  

This is NOT part of any supported API. * If you write code that depends on this, you do so at your own risk. * This code and its internal interfaces are subject to change or * deletion without notice. */ public class BuildState { private Map modules = new HashMap<>(); private Map packages = new HashMap<>(); private Map sources = new HashMap<>(); private Map artifacts = new HashMap<>(); // Map from package to a set of packages that depend on said package. private Map> dependents = new HashMap<>(); public Map modules() { return modules; } public Map packages() { return packages; } public Map sources() { return sources; } public Map artifacts() { return artifacts; } public Map> dependents() { return dependents; } /** * Lookup a module from a name. Create the module if it does * not exist yet. */ public Module lookupModule(String mod) { Module m = modules.get(mod); if (m == null) { m = new Module(mod, "???"); modules.put(mod, m); } return m; } /** * Find a module from a given package name. For example: * The package name "base:java.lang" will fetch the module named "base". * The package name ":java.net" will fetch the default module. */ Module findModuleFromPackageName(String pkg) { int cp = pkg.indexOf(':'); Assert.check(cp != -1, "Could not find package name"); String mod = pkg.substring(0, cp); return lookupModule(mod); } /** * Store references to all packages, sources and artifacts for all modules * into the build state. I.e. flatten the module tree structure * into global maps stored in the BuildState for easy access. * * @param m The set of modules. */ public void flattenPackagesSourcesAndArtifacts(Map m) { modules = m; // Extract all the found packages. for (Module i : modules.values()) { for (Map.Entry j : i.packages().entrySet()) { Package p = packages.get(j.getKey()); // Check that no two different packages are stored under same name. Assert.check(p == null || p == j.getValue()); if (p == null) { p = j.getValue(); packages.put(j.getKey(),j.getValue()); } for (Map.Entry k : p.sources().entrySet()) { Source s = sources.get(k.getKey()); // Check that no two different sources are stored under same name. Assert.check(s == null || s == k.getValue()); if (s == null) { s = k.getValue(); sources.put(k.getKey(), k.getValue()); } } for (Map.Entry g : p.artifacts().entrySet()) { File f = artifacts.get(g.getKey()); // Check that no two artifacts are stored under the same file. Assert.check(f == null || f == g.getValue()); if (f == null) { f = g.getValue(); artifacts.put(g.getKey(), g.getValue()); } } } } } /** * Store references to all artifacts found in the module tree into the maps * stored in the build state. * * @param m The set of modules. */ public void flattenArtifacts(Map m) { modules = m; // Extract all the found packages. for (Module i : modules.values()) { for (Map.Entry j : i.packages().entrySet()) { Package p = packages.get(j.getKey()); // Check that no two different packages are stored under same name. Assert.check(p == null || p == j.getValue()); p = j.getValue(); packages.put(j.getKey(),j.getValue()); for (Map.Entry g : p.artifacts().entrySet()) { File f = artifacts.get(g.getKey()); // Check that no two artifacts are stored under the same file. Assert.check(f == null || f == g.getValue()); artifacts.put(g.getKey(), g.getValue()); } } } } /** * Calculate the package dependents (ie the reverse of the dependencies). */ public void calculateDependents() { dependents = new HashMap<>(); for (String s : packages.keySet()) { Package p = packages.get(s); // Collect all dependencies of the classes in this package Set deps = p.typeDependencies() // maps fqName -> set of dependencies .values() .stream() .reduce(Collections.emptySet(), Util::union); // Now reverse the direction for (String dep : deps) { // Add the dependent information to the global dependent map. String depPkgStr = ":" + dep.substring(0, dep.lastIndexOf('.')); dependents.merge(depPkgStr, Collections.singleton(s), Util::union); // Also add the dependent information to the package specific map. // Normally, you do not compile java.lang et al. Therefore // there are several packages that p depends upon that you // do not have in your state database. This is perfectly fine. Package dp = packages.get(depPkgStr); if (dp != null) { // But this package did exist in the state database. dp.addDependent(p.name()); } } } } /** * Verify that the setModules method above did the right thing when * running through the {@literal module->package->source} structure. */ public void checkInternalState(String msg, boolean linkedOnly, Map srcs) { boolean baad = false; Map original = new HashMap<>(); Map calculated = new HashMap<>(); for (String s : sources.keySet()) { Source ss = sources.get(s); if (ss.isLinkedOnly() == linkedOnly) { calculated.put(s,ss); } } for (String s : srcs.keySet()) { Source ss = srcs.get(s); if (ss.isLinkedOnly() == linkedOnly) { original.put(s,ss); } } if (original.size() != calculated.size()) { Log.error("INTERNAL ERROR "+msg+" original and calculated are not the same size!"); baad = true; } if (!original.keySet().equals(calculated.keySet())) { Log.error("INTERNAL ERROR "+msg+" original and calculated do not have the same domain!"); baad = true; } if (!baad) { for (String s : original.keySet()) { Source s1 = original.get(s); Source s2 = calculated.get(s); if (s1 == null || s2 == null || !s1.equals(s2)) { Log.error("INTERNAL ERROR "+msg+" original and calculated have differing elements for "+s); } baad = true; } } if (baad) { for (String s : original.keySet()) { Source ss = original.get(s); Source sss = calculated.get(s); if (sss == null) { Log.error("The file "+s+" does not exist in calculated tree of sources."); } } for (String s : calculated.keySet()) { Source ss = calculated.get(s); Source sss = original.get(s); if (sss == null) { Log.error("The file "+s+" does not exist in original set of found sources."); } } } } /** * Load a module from the javac state file. */ public Module loadModule(String l) { Module m = Module.load(l); modules.put(m.name(), m); return m; } /** * Load a package from the javac state file. */ public Package loadPackage(Module lastModule, String l) { Package p = Package.load(lastModule, l); lastModule.addPackage(p); packages.put(p.name(), p); return p; } /** * Load a source from the javac state file. */ public Source loadSource(Package lastPackage, String l, boolean is_generated) { Source s = Source.load(lastPackage, l, is_generated); lastPackage.addSource(s); sources.put(s.name(), s); return s; } /** * During an incremental compile we need to copy the old javac state * information about packages that were not recompiled. */ public void copyPackagesExcept(BuildState prev, Set recompiled, Set removed) { for (String pkg : prev.packages().keySet()) { // Do not copy recompiled or removed packages. if (recompiled.contains(pkg) || removed.contains(pkg)) continue; Module mnew = findModuleFromPackageName(pkg); Package pprev = prev.packages().get(pkg); // Even though we haven't recompiled this package, we may have // information about its public API: It may be a classpath dependency if (packages.containsKey(pkg)) { pprev.setPubapi(PubApi.mergeTypes(pprev.getPubApi(), packages.get(pkg).getPubApi())); } mnew.addPackage(pprev); // Do not forget to update the flattened data. (See JDK-8071904) packages.put(pkg, pprev); } } }





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