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Unified Diff: third_party/jmake/src/org/pantsbuild/jmake/TextProjectDatabaseReader.java

Issue 1373723003: Fix javac --incremental by using jmake for dependency analysis (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@aidl
Patch Set: fix license check Created 5 years, 3 months ago
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Index: third_party/jmake/src/org/pantsbuild/jmake/TextProjectDatabaseReader.java
diff --git a/third_party/jmake/src/org/pantsbuild/jmake/TextProjectDatabaseReader.java b/third_party/jmake/src/org/pantsbuild/jmake/TextProjectDatabaseReader.java
new file mode 100644
index 0000000000000000000000000000000000000000..d227a8eba8e1b9ac7649afca06aa1be6aff2555f
--- /dev/null
+++ b/third_party/jmake/src/org/pantsbuild/jmake/TextProjectDatabaseReader.java
@@ -0,0 +1,107 @@
+/* Copyright (c) 2002-2013 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.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.ObjectInputStream;
+import java.io.UnsupportedEncodingException;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+
+/**
+ * This class creates the internal representation of the project database from a text buffer.
+ *
+ * The Pants build tool manipulates this data in various ways, and it's easiest for it
+ * to do so by parsing text files directly. This brings JMake into line with Zinc (the
+ * Scala incremental compiler) and allows Pants to handle both uniformly.
+ *
+ * @author Benjy Weinberger
+ * 13 January 2013
+ */
+public class TextProjectDatabaseReader {
+ public Map<String,PCDEntry> readProjectDatabaseFromFile(File infile) {
+ try {
+ BufferedReader in =
+ new BufferedReader(new InputStreamReader(new FileInputStream(infile), "UTF-8"));
+ try {
+ return readProjectDatabase(in);
+ } finally {
+ in.close();
+ }
+ } catch (FileNotFoundException e) {
+ throw new PrivateException(e);
+ } catch (UnsupportedEncodingException e) {
+ throw new PrivateException(e);
+ } catch (IOException e) {
+ throw new PrivateException(e);
+ }
+ }
+
+ public Map<String,PCDEntry> readProjectDatabase(BufferedReader in) {
+ Map<String,PCDEntry> pcd;
+ try {
+ String line = in.readLine();
+ if (!"pcd entries:".equals(line))
+ throw error("Expected: 'pcd entries:', got: " + line);
+ line = in.readLine();
+ Matcher m = Pattern.compile("^(\\d+) items$").matcher(line);
+ if (!m.matches())
+ throw error("Expected: '<n> items', got: " + line);
+ int numEntries = Integer.parseInt(m.group(1));
+ pcd = new LinkedHashMap<String, PCDEntry>(numEntries);
+ for (int i = 0; i < numEntries; i++) {
+ line = in.readLine();
+ if (line == null)
+ throw error("Unexpected EOF");
+ String[] parts = line.split("\t");
+ if (parts.length != 5) {
+ throw error("Invalid line: " + line);
+ }
+ String className = parts[0];
+ String javaFullFilePath = parts[1];
+ long oldClassFileLastModified = Long.parseLong(parts[2]);
+ long oldClassFileFingerprint = Long.parseLong(parts[3]);
+ ClassInfo ci = classInfoFromBase64(parts[4]);
+ PCDEntry entry = new PCDEntry(className, javaFullFilePath, oldClassFileLastModified,
+ oldClassFileFingerprint, ci);
+ pcd.put(entry.className, entry);
+ }
+ // We're done: We have detailed dep information in the PCD entries, so we don't
+ // need to read the dep information lines from the file.
+ } catch (IOException e) {
+ throw new PrivateException(e);
+ }
+ return pcd;
+ }
+
+ private PrivateException error(String msg) {
+ return new PrivateException(new IllegalArgumentException(msg));
+ }
+
+ private ClassInfo classInfoFromBase64(String s) {
+ try {
+ byte[] bytes = Base64.decode(s.toCharArray());
+ ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes));
+ ClassInfo ret = (ClassInfo)ois.readObject();
+ ret.initializeImmediateTransientFields();
+ return ret;
+ } catch (IOException e) {
+ throw new PrivateException(e);
+ } catch (ClassNotFoundException e) {
+ throw new PrivateException(e);
+ }
+ }
+}

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