1 files changed, 115 insertions, 0 deletions
diff --git a/src/proguard/LibraryKeepChecker.java b/src/proguard/LibraryKeepChecker.java
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+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program 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 for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard;
+
+import proguard.classfile.*;
+import proguard.classfile.util.*;
+import proguard.classfile.visitor.*;
+import proguard.optimize.*;
+
+import java.util.List;
+
+/**
+ * This class checks whether some keep rules only keep library classes, no
+ * program classes. That is strange, because library classes never need to
+ * be kept explicitly.
+ *
+ * @author Eric Lafortune
+ */
+public class LibraryKeepChecker
+implements   ClassVisitor
+{
+    private final ClassPool      programClassPool;
+    private final ClassPool      libraryClassPool;
+    private final WarningPrinter notePrinter;
+
+    // Some fields acting as parameters for the class visitor.
+    private String keepName;
+
+
+    /**
+     * Creates a new DescriptorKeepChecker.
+     */
+    public LibraryKeepChecker(ClassPool      programClassPool,
+                              ClassPool      libraryClassPool,
+                              WarningPrinter notePrinter)
+    {
+        this.programClassPool = programClassPool;
+        this.libraryClassPool = libraryClassPool;
+        this.notePrinter      = notePrinter;
+    }
+
+
+    /**
+     * Checks the classes mentioned in the given keep specifications, printing
+     * notes if necessary.
+     */
+    public void checkClassSpecifications(List keepSpecifications)
+    {
+        if (keepSpecifications != null)
+        {
+            // Go over all individual keep specifications.
+            for (int index = 0; index < keepSpecifications.size(); index++)
+            {
+                KeepClassSpecification keepClassSpecification =
+                    (KeepClassSpecification)keepSpecifications.get(index);
+
+                // Is the keep specification more specific than a general
+                // wildcard?
+                keepName = keepClassSpecification.className;
+                if (keepName != null)
+                {
+                    // Doesn't the specification match any program classes?
+                    ClassCounter programClassCounter = new ClassCounter();
+                    programClassPool.accept(
+                        ClassSpecificationVisitorFactory.createClassPoolVisitor(keepClassSpecification,
+                                                                                programClassCounter,
+                                                                                null));
+                    if (programClassCounter.getCount() == 0)
+                    {
+                        // Print out notes about any matched library classes.
+                        libraryClassPool.accept(
+                            ClassSpecificationVisitorFactory.createClassPoolVisitor(keepClassSpecification,
+                                                                                    this,
+                                                                                    null));
+                    }
+                }
+            }
+        }
+    }
+
+
+    // Implementations for ClassVisitor.
+
+    public void visitProgramClass(ProgramClass programClass) {}
+
+
+    public void visitLibraryClass(LibraryClass libraryClass)
+    {
+        String className = libraryClass.getName();
+        notePrinter.print(className,
+                          "Note: the configuration explicitly specifies '" +
+                          ClassUtil.externalClassName(keepName) +
+                          "' to keep library class '" +
+                          ClassUtil.externalClassName(className) +
+                          "'");
+    }
+}