key.java

JAVA编写的

/**
 * Copyright (c) 2009, Ben Fortuna
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  o Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 *  o Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 *  o Neither the name of Ben Fortuna nor the names of any other contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package net.fortuna.ical4j.vcard.property;

import static org.apache.commons.lang.StringUtils.isNotEmpty;
import net.fortuna.ical4j.model.ValidationException;
import net.fortuna.ical4j.vcard.Group;
import net.fortuna.ical4j.vcard.Parameter;
import net.fortuna.ical4j.vcard.Property;
import net.fortuna.ical4j.vcard.parameter.Encoding;
import net.fortuna.ical4j.vcard.parameter.Type;

import org.apache.commons.codec.BinaryEncoder;
import org.apache.commons.codec.EncoderException;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * $Id: Key.java,v 1.9 2009/01/12 03:34:39 fortuna Exp $
 *
 * Created on 23/10/2008
 *
 * @author Ben
 *
 */
public final class Key extends Property {

    /**
     * 
     */
    private static final long serialVersionUID = -6645173064940148955L;

    private String value;
    
    private byte[] binary;

    private Log log = LogFactory.getLog(Key.class);
    
    /**
     * @param value
     */
    public Key(String value) {
        this(null, value);
    }
    
    /**
     * @param group
     * @param value
     */
    public Key(Group group, String value) {
        super(group, Id.KEY);
        this.value = value;
    }
    
    /**
     * @param binary
     */
    public Key(byte[] binary) {
        this(binary, null);
    }
    
    /**
     * @param binary
     * @param contentType
     */
    public Key(byte[] binary, Type contentType) {
        super(Id.KEY);
        this.binary = binary;
        getParameters().add(Encoding.B);
        if (contentType != null) {
            getParameters().add(contentType);
        }
    }
    
    /**
     * @return the binary
     */
    public byte[] getBinary() {
        return binary;
    }

    /* (non-Javadoc)
     * @see net.fortuna.ical4j.vcard.Property#getValue()
     */
    @Override
    public String getValue() {
        if (isNotEmpty(value)) {
            return value;
        }
        else if (binary != null) {
            try {
                final BinaryEncoder encoder = new Base64();
                return new String(encoder.encode(binary));
            }
            catch (EncoderException ee) {
                log.error("Error encoding binary data", ee);
            }
        }
        return null;
    }

    /* (non-Javadoc)
     * @see net.fortuna.ical4j.vcard.Property#validate()
     */
    @Override
    public void validate() throws ValidationException {
        for (Parameter param : getParameters()) {
            assertPidParameter(param);
        }
    }

}