Source Code Cross Referenced for ContentLengthHeader.java in  » 6.0-JDK-Modules » j2me » gov » nist » siplite » header » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » gov.nist.siplite.header 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Portions Copyright  2000-2007 Sun Microsystems, Inc. All Rights
003:         * Reserved.  Use is subject to license terms.
004:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
005:         * 
006:         * This program is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU General Public License version
008:         * 2 only, as published by the Free Software Foundation.
009:         * 
010:         * This program is distributed in the hope that it will be useful, but
011:         * WITHOUT ANY WARRANTY; without even the implied warranty of
012:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
013:         * General Public License version 2 for more details (a copy is
014:         * included at /legal/license.txt).
015:         * 
016:         * You should have received a copy of the GNU General Public License
017:         * version 2 along with this work; if not, write to the Free Software
018:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
019:         * 02110-1301 USA
020:         * 
021:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
022:         * Clara, CA 95054 or visit www.sun.com if you need additional
023:         * information or have any questions.
024:         */
025:        /*
026:         */
027:        package gov.nist.siplite.header;
028:
029:        import gov.nist.core.*;
030:
031:        /**
032:         * ContentLengthHeader Header (of which there can be only one in a SIPMessage).
033:         * <pre>
034:         * Format:
035:         * Content-Length = "Content-Length" ":" 1*DIGIT
036:         * For details please see RFC 2616, section 14.13
037:         * </pre>
038:         *
039:         *
040:         * IMPL_NOTE: think about removing the specific parser for ContentLengthHeader.
041:         */
042:        public class ContentLengthHeader extends ParameterLessHeader {
043:
044:            /**
045:             * Content length field.
046:             */
047:            protected Integer contentLength;
048:
049:            /** Conten length header field label. */
050:            public static final String NAME = Header.CONTENT_LENGTH;
051:
052:            /** Handle for class. */
053:            protected static Class clazz;
054:
055:            static {
056:                clazz = new ContentLengthHeader().getClass();
057:            }
058:
059:            /**
060:             * Default constructor.
061:             */
062:            public ContentLengthHeader() {
063:                super (CONTENT_LENGTH);
064:            }
065:
066:            /**
067:             * Constructor given a length.
068:             * @param length the initial content length
069:             */
070:            public ContentLengthHeader(int length) {
071:                super (CONTENT_LENGTH);
072:                this .contentLength = new Integer(length);
073:                this .headerValue = String.valueOf(contentLength.intValue());
074:            }
075:
076:            /**
077:             * Gets the content length header field.
078:             * @return the content length
079:             */
080:            public int getContentLength() {
081:                return contentLength.intValue();
082:            }
083:
084:            /**
085:             * Sets the content length member.
086:             * @param contentLength int to set
087:             */
088:            public void setContentLength(int contentLength)
089:                    throws IllegalArgumentException {
090:                if (contentLength < 0)
091:                    throw new IllegalArgumentException("parameter is <0");
092:
093:                this .contentLength = new Integer(contentLength);
094:                this .headerValue = String.valueOf(contentLength);
095:            }
096:
097:            /**
098:             * Encodes into a canonical string.
099:             * @return String
100:             */
101:            public String encodeBody() {
102:                if (contentLength == null)
103:                    return "0";
104:                else
105:                    return contentLength.toString();
106:            }
107:
108:            /**
109:             * Copies the cirrent instance.
110:             * @return copy of the current object
111:             */
112:            public Object clone() {
113:                ContentLengthHeader retval = new ContentLengthHeader();
114:
115:                if (contentLength != null) {
116:                    retval.contentLength = new Integer(contentLength.intValue());
117:                }
118:
119:                return retval;
120:            }
121:
122:            /**
123:             * Gets the content length header value.
124:             * @return the content length
125:             */
126:            public Object getValue() {
127:                return this .contentLength;
128:            }
129:
130:            /**
131:             * Sets the header value field.
132:             * @param value is the value field to set.
133:             * @throws IllegalArgumentException if the value is invalid.
134:             */
135:            public void setHeaderValue(String value)
136:                    throws IllegalArgumentException {
137:                int val;
138:
139:                try {
140:                    val = Integer.parseInt(value);
141:                    setContentLength(val);
142:                } catch (IllegalArgumentException iae) {
143:                    throw iae;
144:                }
145:            }
146:        }
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