JavaMail 1.6.2 Source Code Files

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javax/mail/internet/ContentType.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 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.*;

/**
 * This class represents a MIME Content-Type value. It provides
 * methods to parse a Content-Type string into individual components
 * and to generate a MIME style Content-Type string.
 *
 * @author  John Mani
 */

public class ContentType {

    private String primaryType;	// primary type
    private String subType;	// subtype
    private ParameterList list;	// parameter list

    /**
     * No-arg Constructor.
     */
    public ContentType() { }

    /**
     * Constructor.
     *
     * @param	primaryType	primary type
     * @param	subType	subType
     * @param	list	ParameterList
     */
    public ContentType(String primaryType, String subType, 
			ParameterList list) {
	this.primaryType = primaryType;
	this.subType = subType;
	this.list = list;
    }

    /**
     * Constructor that takes a Content-Type string. The String
     * is parsed into its constituents: primaryType, subType
     * and parameters. A ParseException is thrown if the parse fails. 
     *
     * @param	s	the Content-Type string.
     * @exception	ParseException if the parse fails.
     */
    public ContentType(String s) throws ParseException {
	HeaderTokenizer h = new HeaderTokenizer(s, HeaderTokenizer.MIME);
	HeaderTokenizer.Token tk;

	// First "type" ..
	tk = h.next();
	if (tk.getType() != HeaderTokenizer.Token.ATOM)
	    throw new ParseException("In Content-Type string <" + s + ">" +
					", expected MIME type, got " +
					tk.getValue());
	primaryType = tk.getValue();

	// The '/' separator ..
	tk = h.next();
	if ((char)tk.getType() != '/')
	    throw new ParseException("In Content-Type string <" + s + ">" +
				", expected '/', got " + tk.getValue());

	// Then "subType" ..
	tk = h.next();
	if (tk.getType() != HeaderTokenizer.Token.ATOM)
	    throw new ParseException("In Content-Type string <" + s + ">" +
					", expected MIME subtype, got " +
					tk.getValue());
	subType = tk.getValue();

	// Finally parameters ..
	String rem = h.getRemainder();
	if (rem != null)
	    list = new ParameterList(rem);
    }

    /**
     * Return the primary type.
     * @return the primary type
     */
    public String getPrimaryType() {
	return primaryType;
    }

    /**
     * Return the subType.
     * @return the subType
     */
    public String getSubType() {
	return subType;
    }

    /**
     * Return the MIME type string, without the parameters.
     * The returned value is basically the concatenation of
     * the primaryType, the '/' character and the secondaryType.
     *
     * @return the type
     */
    public String getBaseType() {
	if (primaryType == null || subType == null)
	    return "";
	return primaryType + '/' + subType;
    }

    /**
     * Return the specified parameter value. Returns <code>null</code>
     * if this parameter is absent.
     *
     * @param	name	the parameter name
     * @return	parameter value
     */
    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
     */
    public ParameterList getParameterList() {
	return list;
    }

    /**
     * Set the primary type. Overrides existing primary type.
     * @param	primaryType	primary type
     */
    public void setPrimaryType(String primaryType) {
	this.primaryType = primaryType;
    }

    /**
     * Set the subType.  Replaces the existing subType.
     * @param	subType	the subType
     */
    public void setSubType(String subType) {
	this.subType = subType;
    }

    /**
     * Set the specified parameter. If this parameter already exists,
     * it is replaced by this new value.
     *
     * @param	name	parameter name
     * @param	value	parameter value
     */
    public void setParameter(String name, String value) {
	if (list == null)
	    list = new ParameterList();

	list.set(name, value);
    }

    /**
     * Set a new ParameterList.
     * @param	list	ParameterList
     */
    public void setParameterList(ParameterList list) {
	this.list = list;
    }

    /**
     * Retrieve a RFC2045 style string representation of
     * this Content-Type. Returns an empty string if
     * the conversion failed.
     *
     * @return	RFC2045 style string
     */
    @Override
    public String toString() {
	if (primaryType == null || subType == null) // need both
	    return "";

	StringBuilder sb = new StringBuilder();
	sb.append(primaryType).append('/').append(subType);
	if (list != null)
            // append the parameter list 
            // use the length of the string buffer + the length of
            // the header name formatted as follows "Content-Type: "
	    sb.append(list.toString(sb.length() + 14));
	
	return sb.toString();
    }

    /**
     * Match with the specified ContentType object. This method
     * compares <strong>only the <code>primaryType</code> and 
     * <code>subType</code> </strong>. The parameters of both operands
     * are ignored. <p>
     *
     * For example, this method will return <code>true</code> when
     * comparing the ContentTypes for <strong>"text/plain"</strong>
     * and <strong>"text/plain; charset=foobar"</strong>.
     *
     * If the <code>subType</code> of either operand is the special
     * character '*', then the subtype is ignored during the match. 
     * For example, this method will return <code>true</code> when 
     * comparing the ContentTypes for <strong>"text/plain"</strong> 
     * and <strong>"text/*" </strong>
     *
     * @param   cType	ContentType to compare this against
     * @return	true if it matches
     */
    public boolean match(ContentType cType) {
	// Match primaryType
	if (!((primaryType == null && cType.getPrimaryType() == null) ||
		(primaryType != null &&
		    primaryType.equalsIgnoreCase(cType.getPrimaryType()))))
	    return false;
	
	String sType = cType.getSubType();

	// If either one of the subTypes is wildcarded, return true
	if ((subType != null && subType.startsWith("*")) ||
	    (sType != null && sType.startsWith("*")))
	    return true;
	
	// Match subType
	return (subType == null && sType == null) ||
	    (subType != null && subType.equalsIgnoreCase(sType));
    }

    /**
     * Match with the specified content-type string. This method
     * compares <strong>only the <code>primaryType</code> and 
     * <code>subType</code> </strong>.
     * The parameters of both operands are ignored. <p>
     *
     * For example, this method will return <code>true</code> when
     * comparing the ContentType for <strong>"text/plain"</strong>
     * with <strong>"text/plain; charset=foobar"</strong>.
     *
     * If the <code>subType</code> of either operand is the special 
     * character '*', then the subtype is ignored during the match. 
     * For example, this method will return <code>true</code> when 
     * comparing the ContentType for <strong>"text/plain"</strong> 
     * with <strong>"text/*" </strong>
     *
     * @param	s	the content-type string to match
     * @return	true if it matches
     */
    public boolean match(String s) {
	try {
	    return match(new ContentType(s));
	} catch (ParseException pex) {
	    return false;
	}
    }
}

javax/mail/internet/ContentType.java

 

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File name: javax.mail-1.6.2-sources.jar
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Release date: 2018-08-29
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