javax.mail.internet.ContentDisposition Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://oss.oracle.com/licenses/CDDL+GPL-1.1
* or LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package javax.mail.internet;
import javax.mail.*;
import java.util.*;
import java.io.*;
import com.sun.mail.util.PropUtil;
/**
* This class represents a MIME ContentDisposition value. It provides
* methods to parse a ContentDisposition string into individual components
* and to generate a MIME style ContentDisposition string.
*
* @author John Mani
*/
public class ContentDisposition {
private static final boolean contentDispositionStrict =
PropUtil.getBooleanSystemProperty("mail.mime.contentdisposition.strict", true);
private String disposition; // disposition
private ParameterList list; // parameter list
/**
* No-arg Constructor.
*/
public ContentDisposition() { }
/**
* Constructor.
*
* @param disposition disposition
* @param list ParameterList
* @since JavaMail 1.2
*/
public ContentDisposition(String disposition, ParameterList list) {
this.disposition = disposition;
this.list = list;
}
/**
* Constructor that takes a ContentDisposition string. The String
* is parsed into its constituents: dispostion and parameters.
* A ParseException is thrown if the parse fails.
*
* @param s the ContentDisposition string.
* @exception ParseException if the parse fails.
* @since JavaMail 1.2
*/
public ContentDisposition(String s) throws ParseException {
HeaderTokenizer h = new HeaderTokenizer(s, HeaderTokenizer.MIME);
HeaderTokenizer.Token tk;
// First "disposition" ..
tk = h.next();
if (tk.getType() != HeaderTokenizer.Token.ATOM) {
if (contentDispositionStrict) {
throw new ParseException("Expected disposition, got " +
tk.getValue());
}
} else {
disposition = tk.getValue();
}
// Then parameters ..
String rem = h.getRemainder();
if (rem != null) {
try {
list = new ParameterList(rem);
} catch (ParseException px) {
if (contentDispositionStrict) {
throw px;
}
}
}
}
/**
* Return the disposition value.
* @return the disposition
* @since JavaMail 1.2
*/
public String getDisposition() {
return disposition;
}
/**
* Return the specified parameter value. Returns null
* if this parameter is absent.
*
* @param name the parameter name
* @return parameter value
* @since JavaMail 1.2
*/
public String getParameter(String name) {
if (list == null)
return null;
return list.get(name);
}
/**
* Return a ParameterList object that holds all the available
* parameters. Returns null if no parameters are available.
*
* @return ParameterList
* @since JavaMail 1.2
*/
public ParameterList getParameterList() {
return list;
}
/**
* Set the disposition. Replaces the existing disposition.
* @param disposition the disposition
* @since JavaMail 1.2
*/
public void setDisposition(String disposition) {
this.disposition = disposition;
}
/**
* Set the specified parameter. If this parameter already exists,
* it is replaced by this new value.
*
* @param name parameter name
* @param value parameter value
* @since JavaMail 1.2
*/
public void setParameter(String name, String value) {
if (list == null)
list = new ParameterList();
list.set(name, value);
}
/**
* Set a new ParameterList.
* @param list ParameterList
* @since JavaMail 1.2
*/
public void setParameterList(ParameterList list) {
this.list = list;
}
/**
* Retrieve a RFC2045 style string representation of
* this ContentDisposition. Returns an empty string if
* the conversion failed.
*
* @return RFC2045 style string
* @since JavaMail 1.2
*/
@Override
public String toString() {
if (disposition == null)
return "";
if (list == null)
return disposition;
StringBuilder sb = new StringBuilder(disposition);
// append the parameter list
// use the length of the string buffer + the length of
// the header name formatted as follows "Content-Disposition: "
sb.append(list.toString(sb.length() + 21));
return sb.toString();
}
}