Fix javac --incremental by using jmake for dependency analysis

third_party/jmake/src/org/pantsbuild/jmake/PCDContainer.java

Index: third_party/jmake/src/org/pantsbuild/jmake/PCDContainer.java
diff --git a/third_party/jmake/src/org/pantsbuild/jmake/PCDContainer.java b/third_party/jmake/src/org/pantsbuild/jmake/PCDContainer.java
new file mode 100644
index 0000000000000000000000000000000000000000..b02cfa49fee20fb60f1769029e40fe2f3c0eafab
--- /dev/null
+++ b/third_party/jmake/src/org/pantsbuild/jmake/PCDContainer.java
@@ -0,0 +1,64 @@
+/* Copyright (c) 2002-2008 Sun Microsystems, Inc. All rights reserved
+ *
+ * This program is distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+package org.pantsbuild.jmake;
+
+import java.io.File;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * This class is a persistent container for the Project Class Directory, that can
+ * read and write itself from/to disk.
+ *
+ * @author Misha Dmitriev
+ *  12 November 2001
+ */
+public class PCDContainer {
+
+    /** The data structure (currently {@link LinkedHashMap}) for PCD, that maps class name to
+    record containing information about the class */
+    Map<String,PCDEntry> pcd;
+    String storeName;
+    boolean textFormat;
+
+    private PCDContainer(Map<String,PCDEntry> pcd, String storeName, boolean textFormat) {
+        this.storeName = storeName;
+        this.pcd = pcd;
+        this.textFormat = textFormat;
+    }
+
+    public static PCDContainer load(String storeName, boolean textFormat) {
+        if (storeName == null) {
+            storeName = Main.DEFAULT_STORE_NAME;
+        }
+        File storeFile = Utils.checkFileForName(storeName);
+        if (storeFile != null) {
+            Utils.printInfoMessageNoEOL("Opening project database...  ");
+            Map<String,PCDEntry> pcd;
+            if (textFormat) {
+                pcd = new TextProjectDatabaseReader().readProjectDatabaseFromFile(storeFile);
+            } else {
+                pcd = new BinaryProjectDatabaseReader().readProjectDatabaseFromFile(storeFile);
+            }
+            PCDContainer pcdc = new PCDContainer(pcd, storeName, textFormat);
+            Utils.printInfoMessage("Done.");
+            return pcdc;
+        }
+        return new PCDContainer(null, storeName, textFormat);
+    }
+
+    public void save() {
+        Utils.printInfoMessageNoEOL("Writing project database...  ");
+        File outfile = new File(storeName);
+        if (textFormat) {
+            new TextProjectDatabaseWriter().writeProjectDatabaseToFile(outfile, pcd);
+        } else {
+            new BinaryProjectDatabaseWriter().writeProjectDatabaseToFile(outfile, pcd);
+        }
+        Utils.printInfoMessage("Done.");
+    }
+}