author | asaha |
Tue, 14 Jan 2014 08:08:32 -0800 | |
changeset 22449 | 1fd6d4bec7dd |
parent 22163 | 3651128c74eb |
parent 22448 | a85fbad9d687 |
child 26098 | 32588700060b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.tools.sjavac; |
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import java.io.File; |
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import java.net.URI; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Set; |
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/** |
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* The Package class maintains meta information about a package. |
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* For example its sources, dependents,its pubapi and its artifacts. |
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* |
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* It might look odd that we track dependents/pubapi/artifacts on |
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* a package level, but it makes sense since recompiling a full package |
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* takes as long as recompiling a single java file in that package, |
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* if you take into account the startup time of the jvm. |
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* |
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* Also the dependency information will be much smaller (good for the javac_state file size) |
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* and it simplifies tracking artifact generation, you do not always know from which |
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* source a class file was generated, but you always know which package it belongs to. |
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* |
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* It is also educational to see package dependencies triggering recompilation of |
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* other packages. Even though the recompilation was perhaps not necessary, |
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* the visible recompilation of the dependent packages indicates how much circular |
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* dependencies your code has. |
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* |
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* <p><b>This is NOT part of any supported API. |
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* If you write code that depends on this, you do so at your own |
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* risk. This code and its internal interfaces are subject to change |
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* or deletion without notice.</b></p> |
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*/ |
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public class Package implements Comparable<Package> { |
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// The module this package belongs to. (There is a legacy module with an empty string name, |
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// used for all legacy sources.) |
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private Module mod; |
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// Name of this package, module:pkg |
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// ex1 jdk.base:java.lang |
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// ex2 :java.lang (when in legacy mode) |
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private String name; |
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// The directory path to the package. If the package belongs to a module, |
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// then that module's file system name is part of the path. |
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private String dirname; |
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// This package depends on these packages. |
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private Set<String> dependencies = new HashSet<>(); |
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// This package has the following dependents, that depend on this package. |
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private Set<String> dependents = new HashSet<>(); |
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// This is the public api of this package. |
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private List<String> pubapi = new ArrayList<>(); |
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// Map from source file name to Source info object. |
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private Map<String,Source> sources = new HashMap<>(); |
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// This package generated these artifacts. |
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private Map<String,File> artifacts = new HashMap<>(); |
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public Package(Module m, String n) { |
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int c = n.indexOf(":"); |
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assert(c != -1); |
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String mn = n.substring(0,c); |
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assert(m.name().equals(m.name())); |
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name = n; |
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dirname = n.replace('.', File.separatorChar); |
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if (m.name().length() > 0) { |
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// There is a module here, prefix the module dir name to the path. |
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dirname = m.dirname()+File.separatorChar+dirname; |
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} |
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} |
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public Module mod() { return mod; } |
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public String name() { return name; } |
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public String dirname() { return dirname; } |
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public Map<String,Source> sources() { return sources; } |
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public Map<String,File> artifacts() { return artifacts; } |
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public List<String> pubapi() { return pubapi; } |
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public Set<String> dependencies() { return dependencies; } |
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public Set<String> dependents() { return dependents; } |
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@Override |
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public boolean equals(Object o) { |
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return (o instanceof Package) && name.equals(((Package)o).name); |
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} |
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@Override |
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public int hashCode() { |
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return name.hashCode(); |
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} |
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@Override |
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public int compareTo(Package o) { |
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return name.compareTo(o.name); |
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} |
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public void addSource(Source s) { |
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sources.put(s.file().getPath(), s); |
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} |
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public void addDependency(String d) { |
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dependencies.add(d); |
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} |
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public void addDependent(String d) { |
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dependents.add(d); |
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} |
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public void addPubapi(String p) { |
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pubapi.add(p); |
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} |
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|
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/** |
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* Check if we have knowledge in the javac state that |
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* describe the results of compiling this package before. |
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*/ |
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public boolean existsInJavacState() { |
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return artifacts.size() > 0 || pubapi.size() > 0; |
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} |
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|
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public static List<String> pubapiToList(String ps) |
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{ |
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String[] lines = ps.split("\n"); |
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List<String> r = new ArrayList<>(); |
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for (String l : lines) { |
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r.add(l); |
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} |
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return r; |
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} |
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155 |
|
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public boolean hasPubapiChanged(List<String> ps) { |
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Iterator<String> i = ps.iterator(); |
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Iterator<String> j = pubapi.iterator(); |
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int line = 0; |
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while (i.hasNext() && j.hasNext()) { |
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String is = i.next(); |
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String js = j.next(); |
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if (!is.equals(js)) { |
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Log.debug("Change in pubapi for package "+name+" line "+line); |
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Log.debug("Old: "+js); |
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Log.debug("New: "+is); |
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return true; |
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} |
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line++; |
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} |
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if ((i.hasNext() && !j.hasNext() ) || |
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(!i.hasNext() && j.hasNext())) { |
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Log.debug("Change in pubapi for package "+name); |
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if (i.hasNext()) { |
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Log.debug("New has more lines!"); |
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} else { |
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Log.debug("Old has more lines!"); |
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} |
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return true; |
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} |
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return false; |
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} |
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|
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public void setPubapi(List<String> ps) { |
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pubapi = ps; |
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} |
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|
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public void setDependencies(Set<String> ds) { |
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dependencies = ds; |
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} |
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|
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public void save(StringBuilder b) { |
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b.append("P ").append(name).append("\n"); |
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Source.saveSources(sources, b); |
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saveDependencies(b); |
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savePubapi(b); |
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saveArtifacts(b); |
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} |
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199 |
|
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static public Package load(Module module, String l) { |
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String name = l.substring(2); |
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return new Package(module, name); |
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} |
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204 |
|
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public void loadDependency(String l) { |
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String n = l.substring(2); |
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addDependency(n); |
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} |
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209 |
|
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public void loadPubapi(String l) { |
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String pi = l.substring(2); |
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addPubapi(pi); |
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} |
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|
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public void saveDependencies(StringBuilder b) { |
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List<String> sorted_dependencies = new ArrayList<>(); |
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for (String key : dependencies) { |
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sorted_dependencies.add(key); |
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219 |
} |
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Collections.sort(sorted_dependencies); |
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221 |
for (String a : sorted_dependencies) { |
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222 |
b.append("D "+a+"\n"); |
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223 |
} |
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224 |
} |
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225 |
|
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public void savePubapi(StringBuilder b) { |
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for (String l : pubapi) { |
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228 |
b.append("I "+l+"\n"); |
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229 |
} |
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230 |
} |
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231 |
|
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public static void savePackages(Map<String,Package> packages, StringBuilder b) { |
22163 | 233 |
List<String> sorted_packages = new ArrayList<>(); |
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for (String key : packages.keySet() ) { |
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sorted_packages.add(key); |
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236 |
} |
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Collections.sort(sorted_packages); |
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238 |
for (String s : sorted_packages) { |
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Package p = packages.get(s); |
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p.save(b); |
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241 |
} |
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242 |
} |
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243 |
|
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244 |
public void addArtifact(String a) { |
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245 |
artifacts.put(a, new File(a)); |
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246 |
} |
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247 |
|
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248 |
public void addArtifact(File f) { |
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|
249 |
artifacts.put(f.getPath(), f); |
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|
250 |
} |
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251 |
|
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252 |
public void addArtifacts(Set<URI> as) { |
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253 |
for (URI u : as) { |
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|
254 |
addArtifact(new File(u)); |
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|
255 |
} |
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256 |
} |
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257 |
|
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258 |
public void setArtifacts(Set<URI> as) { |
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259 |
assert(!artifacts.isEmpty()); |
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artifacts = new HashMap<>(); |
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261 |
addArtifacts(as); |
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|
262 |
} |
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263 |
|
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264 |
public void loadArtifact(String l) { |
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265 |
// Find next space after "A ". |
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266 |
int dp = l.indexOf(' ',2); |
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267 |
String fn = l.substring(2,dp); |
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268 |
long last_modified = Long.parseLong(l.substring(dp+1)); |
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269 |
File f = new File(fn); |
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if (f.exists() && f.lastModified() != last_modified) { |
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// Hmm, the artifact on disk does not have the same last modified |
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// timestamp as the information from the build database. |
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// We no longer trust the artifact on disk. Delete it. |
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// The smart javac wrapper will then rebuild the artifact. |
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275 |
Log.debug("Removing "+f.getPath()+" since its timestamp does not match javac_state."); |
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276 |
f.delete(); |
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277 |
} |
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278 |
artifacts.put(f.getPath(), f); |
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} |
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|
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public void saveArtifacts(StringBuilder b) { |
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List<File> sorted_artifacts = new ArrayList<>(); |
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for (File f : artifacts.values()) { |
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sorted_artifacts.add(f); |
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} |
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Collections.sort(sorted_artifacts); |
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for (File f : sorted_artifacts) { |
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// The last modified information is only used |
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// to detect tampering with the output dir. |
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// If the outputdir has been modified, not by javac, |
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// then a mismatch will be detected in the last modified |
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// timestamps stored in the build database compared |
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// to the timestamps on disk and the artifact will be deleted. |
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|
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b.append("A "+f.getPath()+" "+f.lastModified()+"\n"); |
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} |
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} |
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/** |
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* Always clean out a tainted package before it is recompiled. |
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*/ |
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public void deleteArtifacts() { |
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for (File a : artifacts.values()) { |
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a.delete(); |
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} |
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} |
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} |