X-Git-Url: https://juplo.de/gitweb/?p=scannotation;a=blobdiff_plain;f=src%2Fmain%2Fjava%2Forg%2Fscannotation%2Farchiveiterator%2FJarIterator.java;fp=src%2Fmain%2Fjava%2Forg%2Fscannotation%2Farchiveiterator%2FJarIterator.java;h=67291a6e5c74786b58e7bcd0695c877d94ec5c80;hp=0000000000000000000000000000000000000000;hb=36e6637926203201648e7892ec6ee1240807218e;hpb=58b6663aae5313b41167d92851981ca549cbb461

diff --git a/src/main/java/org/scannotation/archiveiterator/JarIterator.java b/src/main/java/org/scannotation/archiveiterator/JarIterator.java
new file mode 100644
index 0000000..67291a6
--- /dev/null
+++ b/src/main/java/org/scannotation/archiveiterator/JarIterator.java
@@ -0,0 +1,77 @@
+package org.scannotation.archiveiterator;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.jar.JarEntry;
+import java.util.jar.JarInputStream;
+
+/**
+ * @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
+ * @version $Revision: 1 $
+ */
+public class JarIterator implements StreamIterator
+{
+   JarInputStream jar;
+   JarEntry next;
+   Filter filter;
+   boolean initial = true;
+   boolean closed = false;
+
+   public JarIterator(File file, Filter filter) throws IOException
+   {
+      this(new FileInputStream(file), filter);
+   }
+
+
+   public JarIterator(InputStream is, Filter filter) throws IOException
+   {
+      this.filter = filter;
+      jar = new JarInputStream(is);
+   }
+
+   private void setNext()
+   {
+      initial = true;
+      try
+      {
+         if (next != null) jar.closeEntry();
+         next = null;
+         do
+         {
+            next = jar.getNextJarEntry();
+         } while (next != null && (next.isDirectory() || (filter == null || !filter.accepts(next.getName()))));
+         if (next == null)
+         {
+            close();
+         }
+      }
+      catch (IOException e)
+      {
+         throw new RuntimeException("failed to browse jar", e);
+      }
+   }
+
+   public InputStream next()
+   {
+      if (closed || (next == null && !initial)) return null;
+      setNext();
+      if (next == null) return null;
+      return new InputStreamWrapper(jar);
+   }
+
+   public void close()
+   {
+      try
+      {
+         closed = true;
+         jar.close();
+      }
+      catch (IOException ignored)
+      {
+
+      }
+
+   }
+}