7021927: javac: regression in performance

Reviewed-by: jjg

langtools/test/tools/javac/file/zip/Utils.java

@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2011, 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.
+ *
+ * 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
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.Closeable;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PrintStream;
+
+public class Utils {
+
+    static final sun.tools.jar.Main jarTool =
+            new sun.tools.jar.Main(System.out, System.err, "jar-tool");
+
+    static final com.sun.tools.javac.Main javac =
+            new com.sun.tools.javac.Main();
+
+    private Utils(){}
+
+    public static boolean compile(String... args) {
+        return javac.compile(args) == 0;
+    }
+
+    public static void createClassFile(File javaFile, File superClass,
+            boolean delete) throws IOException {
+        createJavaFile(javaFile, superClass);
+        if (!compile(javaFile.getName())) {
+            throw new RuntimeException("compile failed unexpectedly");
+        }
+        if (delete) javaFile.delete();
+    }
+
+    public static void createJavaFile(File outFile) throws IOException {
+        createJavaFile(outFile, null);
+    }
+
+    public static void createJavaFile(File outFile, File superClass) throws IOException {
+        PrintStream ps = null;
+        String srcStr = "public class " + getSimpleName(outFile) + " ";
+        if (superClass != null) {
+            srcStr = srcStr.concat("extends " + getSimpleName(superClass) + " ");
+        }
+        srcStr = srcStr.concat("{}");
+        try {
+            FileOutputStream fos = new FileOutputStream(outFile);
+            ps = new PrintStream(fos);
+            ps.println(srcStr);
+        } finally {
+            close(ps);
+        }
+    }
+
+    static String getClassFileName(File javaFile) {
+        return javaFile.getName().endsWith(".java")
+                ? javaFile.getName().replace(".java", ".class")
+                : null;
+    }
+
+    static String getSimpleName(File inFile) {
+        String fname = inFile.getName();
+        return fname.substring(0, fname.indexOf("."));
+    }
+
+    public static void copyStream(InputStream in, OutputStream out) throws IOException {
+        byte[] buf = new byte[8192];
+        int n = in.read(buf);
+        while (n > 0) {
+            out.write(buf, 0, n);
+            n = in.read(buf);
+        }
+    }
+
+    public static void close(Closeable c) {
+        if (c != null) {
+            try {
+                c.close();
+            } catch (IOException ignore) {}
+        }
+    }
+
+    public static void deleteFile(File f) {
+        if (!f.delete()) {
+            throw new RuntimeException("could not delete file: " + f.getAbsolutePath());
+        }
+    }
+
+    public static void cat(File output, File... files) throws IOException {
+        BufferedInputStream bis = null;
+        BufferedOutputStream bos = null;
+        FileOutputStream fos = null;
+        try {
+            fos = new FileOutputStream(output);
+            bos = new BufferedOutputStream(fos);
+            for (File x : files) {
+                FileInputStream fis = new FileInputStream(x);
+                bis = new BufferedInputStream(fis);
+                copyStream(bis, bos);
+                Utils.close(bis);
+            }
+        } finally {
+            Utils.close(bis);
+            Utils.close(bos);
+            Utils.close(fos);
+        }
+    }
+}