implement jar and file URL stream handlers

classpath/java/util/jar/JarFile.java

@@ -0,0 +1,77 @@
+/* Copyright (c) 2011, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
+package java.util.jar;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Enumeration;
+import java.util.zip.ZipFile;
+import java.util.zip.ZipEntry;
+
+public class JarFile extends ZipFile {
+  public JarFile(String name) throws IOException {
+    super(name);
+  }
+
+  public JarFile(File file) throws IOException {
+    super(file);
+  }
+
+  public Enumeration<JarEntry> entries() {
+    return (Enumeration<JarEntry>) makeEnumeration(JarEntryFactory.Instance);
+  }
+
+  public JarEntry getJarEntry(String name) {
+    return (JarEntry) getEntry(JarEntryFactory.Instance, name);
+  }
+
+  private static class MyJarEntry extends JarEntry {
+    public final Window window;
+    public final int pointer;
+
+    public MyJarEntry(Window window, int pointer) {
+      this.window = window;
+      this.pointer = pointer;
+    }
+
+    public String getName() {
+      try {
+        return entryName(window, pointer);
+      } catch (IOException e) {
+        return null;
+      }
+    }
+
+    public int getCompressedSize() {
+      try {
+        return compressedSize(window, pointer);
+      } catch (IOException e) {
+        return 0;
+      }
+    }
+
+    public int getSize() {
+      try {
+        return uncompressedSize(window, pointer);
+      } catch (IOException e) {
+        return 0;
+      }
+    }
+  }
+
+  private static class JarEntryFactory implements EntryFactory {
+    public static final JarEntryFactory Instance = new JarEntryFactory();
+
+    public ZipEntry makeEntry(Window window, int pointer) {
+      return new MyJarEntry(window, pointer);
+    }
+  }
+}