Temporarily add BND library code to the build, to try out some patches

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@723235 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/bundleplugin/src/main/java/aQute/lib/osgi/AbstractResource.java b/bundleplugin/src/main/java/aQute/lib/osgi/AbstractResource.java
new file mode 100644
index 0000000..532b33e
--- /dev/null
+++ b/bundleplugin/src/main/java/aQute/lib/osgi/AbstractResource.java
@@ -0,0 +1,50 @@
+package aQute.lib.osgi;
+
+import java.io.*;
+
+public abstract class AbstractResource implements Resource {
+    String extra;
+    byte[] calculated;
+    long   lastModified;
+
+    protected AbstractResource(long modified) {
+        lastModified = modified;
+    }
+
+    public String getExtra() {
+        return extra;
+    }
+
+    public long lastModified() {
+        return lastModified;
+    }
+
+    public InputStream openInputStream() throws IOException {
+        return new ByteArrayInputStream(getLocalBytes());
+    }
+
+    private byte[] getLocalBytes() throws IOException {
+        try {
+            if (calculated != null)
+                return calculated;
+
+            return calculated = getBytes();
+        } catch (IOException e) {
+            throw e;
+        } catch (Exception e) {
+            IOException ee = new IOException("Opening resource");
+            ee.initCause(e);
+            throw ee;
+        }
+    }
+
+    public void setExtra(String extra) {
+        this.extra = extra;
+    }
+
+    public void write(OutputStream out) throws IOException {
+        out.write(getLocalBytes());
+    }
+
+    abstract protected byte[] getBytes() throws Exception;
+}