1 files changed, 169 insertions, 0 deletions
diff --git a/libjava/gnu/gcj/protocol/file/Connection.java b/libjava/gnu/gcj/protocol/file/Connection.java
new file mode 100644
index 00000000000..7ad7ca0d659
--- /dev/null
+++ b/libjava/gnu/gcj/protocol/file/Connection.java
@@ -0,0 +1,169 @@
+// Connection.java - Implementation of URLConnection for file protocol.
+
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.protocol.file;
+
+import java.net.*;
+import java.io.*;
+import java.util.Vector;
+import java.util.Hashtable;
+import java.util.Enumeration;
+
+/**
+ * @author Warren Levy <warrenl@cygnus.com>
+ * @date April 13, 1999.
+ */
+
+/**
+ * Written using on-line Java Platform 1.2 API Specification, as well
+ * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
+ * Status:  Minimal subset of functionality.
+ */
+
+class Connection extends URLConnection
+{
+  private Hashtable hdrHash = new Hashtable();
+  private Vector hdrVec = new Vector();
+  private boolean gotHeaders = false;
+  private File fileIn;
+
+  public Connection(URL url)
+  {
+    super(url);
+  }
+
+  // Implementation of abstract method.
+  public void connect() throws IOException
+  {
+    // Call is ignored if already connected.
+    if (connected)
+      return;
+
+    // If not connected, then file needs to be openned.
+    fileIn = new File(url.getFile());
+    connected = true;
+  }
+
+  public InputStream getInputStream() throws IOException
+  {
+    if (!connected)
+      connect();
+
+    if (! doInput)
+      throw new ProtocolException("Can't open InputStream if doInput is false");
+    return new BufferedInputStream(new FileInputStream(fileIn));
+  }
+
+  // Override default method in URLConnection.
+  public OutputStream getOutputStream() throws IOException
+  {
+    if (!connected)
+      connect();
+
+    if (! doOutput)
+      throw new
+	ProtocolException("Can't open OutputStream if doOutput is false");
+    return new BufferedOutputStream(new FileOutputStream(fileIn));
+  }
+
+  // Override default method in URLConnection.
+  public String getHeaderField(String name)
+  {
+    try
+      {
+	getHeaders();
+      }
+    catch (IOException x)
+      {
+	return null;
+      }
+    return (String) hdrHash.get(name.toLowerCase());
+  }
+
+  // Override default method in URLConnection.
+  public String getHeaderField(int n)
+  {
+    try
+      {
+	getHeaders();
+      }
+    catch (IOException x)
+      {
+	return null;
+      }
+    if (n < hdrVec.size())
+      return getField((String) hdrVec.elementAt(n));
+
+    return null;
+  }
+
+  // Override default method in URLConnection.
+  public String getHeaderFieldKey(int n)
+  {
+    try
+      {
+	getHeaders();
+      }
+    catch (IOException x)
+      {
+	return null;
+      }
+    if (n < hdrVec.size())
+      return getKey((String) hdrVec.elementAt(n));
+
+    return null;
+  }
+
+  private String getKey(String str)
+  {
+    if (str == null)
+      return null;
+    int index = str.indexOf(':');
+    if (index >= 0)
+      return str.substring(0, index);
+    else
+      return null;
+  }
+
+  private String getField(String str)
+  {
+    if (str == null)
+      return null;
+    int index = str.indexOf(':');
+    if (index >= 0)
+      return str.substring(index + 1).trim();
+    else
+      return str;
+  }
+
+  private void getHeaders() throws IOException
+  {
+    if (gotHeaders)
+      return;
+    gotHeaders = true;
+
+    connect();
+
+    // Yes, it is overkill to use the hash table and vector here since
+    // we're only putting one header in the file, but in case we need
+    // to add others later and for consistency, we'll implement it this way.
+
+    // Add the only header we know about right now:  Content-length.
+    long len = fileIn.length();
+    String line = "Content-length: " + len;
+    hdrVec.addElement(line);
+
+    // The key will never be null in this scenario since we build up the
+    // headers ourselves.  If we ever rely on getting a header from somewhere
+    // else, then we may have to check if the result of getKey() is null.
+    String key = getKey(line);
+    hdrHash.put(key.toLowerCase(), Long.toString(len));
+  }
+}