1 files changed, 133 insertions, 0 deletions
diff --git a/src/org/apache/http/message/BufferedHeader.java b/src/org/apache/http/message/BufferedHeader.java
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+++ b/src/org/apache/http/message/BufferedHeader.java
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+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/message/BufferedHeader.java $
+ * $Revision: 604625 $
+ * $Date: 2007-12-16 06:11:11 -0800 (Sun, 16 Dec 2007) $
+ *
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.message;
+
+import org.apache.http.FormattedHeader;
+import org.apache.http.HeaderElement;
+import org.apache.http.ParseException;
+import org.apache.http.util.CharArrayBuffer;
+
+/**
+ * This class represents a raw HTTP header whose content is parsed 'on demand'
+ * only when the header value needs to be consumed.
+ * 
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ *
+ * <!-- empty lines above to avoid 'svn diff' context problems -->
+ * @version $Revision: 604625 $ $Date: 2007-12-16 06:11:11 -0800 (Sun, 16 Dec 2007) $
+ */
+public class BufferedHeader implements FormattedHeader, Cloneable {
+
+    /**
+     * Header name.
+     */
+    private final String name;
+
+    /**
+     * The buffer containing the entire header line.
+     */
+    private final CharArrayBuffer buffer;
+    
+    /**
+     * The beginning of the header value in the buffer
+     */
+    private final int valuePos;
+
+
+    /**
+     * Creates a new header from a buffer.
+     * The name of the header will be parsed immediately,
+     * the value only if it is accessed.
+     *
+     * @param buffer    the buffer containing the header to represent
+     *
+     * @throws ParseException   in case of a parse error
+     */
+    public BufferedHeader(final CharArrayBuffer buffer)
+        throws ParseException {
+
+        super();
+        if (buffer == null) {
+            throw new IllegalArgumentException
+                ("Char array buffer may not be null");
+        }
+        int colon = buffer.indexOf(':');
+        if (colon == -1) {
+            throw new ParseException
+                ("Invalid header: " + buffer.toString());
+        }
+        String s = buffer.substringTrimmed(0, colon);
+        if (s.length() == 0) {
+            throw new ParseException
+                ("Invalid header: " + buffer.toString());
+        }
+        this.buffer = buffer;
+        this.name = s;
+        this.valuePos = colon + 1;
+    }
+
+
+    public String getName() {
+        return this.name;
+    }
+
+    public String getValue() {
+        return this.buffer.substringTrimmed(this.valuePos, this.buffer.length());
+    }
+
+    public HeaderElement[] getElements() throws ParseException {
+        ParserCursor cursor = new ParserCursor(0, this.buffer.length());
+        cursor.updatePos(this.valuePos);
+        return BasicHeaderValueParser.DEFAULT
+            .parseElements(this.buffer, cursor);
+    }
+
+    public int getValuePos() {
+        return this.valuePos;
+    }
+
+    public CharArrayBuffer getBuffer() {
+        return this.buffer;
+    }
+
+    public String toString() {
+        return this.buffer.toString();
+    }
+
+    public Object clone() throws CloneNotSupportedException {
+        // buffer is considered immutable
+        // no need to make a copy of it
+        return super.clone();
+    }
+ 
+}