svn commit: r291777 - /directory/asn1/trunk/ber-new/src/java/main/org/apache/asn1new/util/BooleanDecoder.java

[el...@apache.org]

Author: elecharny
Date: Mon Sep 26 16:06:54 2005
New Revision: 291777

URL: http://svn.apache.org/viewcvs?rev=291777&view=rev
Log:
Add a class to decode a Boolean BER value

Added:
    directory/asn1/trunk/ber-new/src/java/main/org/apache/asn1new/util/BooleanDecoder.java

Added: directory/asn1/trunk/ber-new/src/java/main/org/apache/asn1new/util/BooleanDecoder.java
URL: http://svn.apache.org/viewcvs/directory/asn1/trunk/ber-new/src/java/main/org/apache/asn1new/util/BooleanDecoder.java?rev=291777&view=auto
==============================================================================
--- directory/asn1/trunk/ber-new/src/java/main/org/apache/asn1new/util/BooleanDecoder.java (added)
+++ directory/asn1/trunk/ber-new/src/java/main/org/apache/asn1new/util/BooleanDecoder.java Mon Sep 26 16:06:54 2005
@@ -0,0 +1,63 @@
+/*
+ *   Copyright 2005 The Apache Software Foundation
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ *
+ */
+package org.apache.asn1new.util;
+
+import org.apache.asn1.codec.DecoderException;
+import org.apache.asn1new.ber.tlv.Value;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+/**
+ * Parse and decode a Boolean value.
+ * 
+ * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
+ */
+public class BooleanDecoder
+{
+    /** The logger */
+    private static final Logger log = LoggerFactory.getLogger( BooleanDecoder.class );
+
+    //~ Methods ------------------------------------------------------------------------------------
+
+    /**
+     * Parse a byte buffer and send back a booelan.
+     * 
+     * @param value The byte buffer to parse
+     *
+     * @return A boolean.
+     *
+     * @throws DecoderException Thrown if the byte stream does not contains a boolean
+     */
+    public static boolean parse( Value value ) throws DecoderException
+    {
+        byte[] bytes  = value.getData();
+
+        if ( bytes.length != 1 )
+        {
+            throw new DecoderException(
+                "The value is not 1 byte long. This is not allowed for a boolean" );
+        }
+
+        if ( ( bytes[0] != 0 ) && ( bytes[0] != 255 ) )
+        {
+            log.warn( "A boolean must be encoded with a 0x00 or a 0xFF value" );
+        }
+
+        return bytes[0] != 0;
+    }
+}