com.adaptris.core.mail.attachment.MailContent.java Source code

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Here is the source code for com.adaptris.core.mail.attachment.MailContent.java

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/*
 * Copyright 2015 Adaptris Ltd.
 * 
 * Licensed 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.
*/

package com.adaptris.core.mail.attachment;

import java.security.MessageDigest;

import javax.mail.internet.ContentType;
import javax.mail.internet.ParseException;

import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;

import com.adaptris.util.text.Conversion;

/**
 * Representation of the body of a mail message.
 *
 * @author lchan
 * @author $Author: lchan $
 */
public class MailContent {

    private transient ContentType contentType;
    private transient byte[] payload;
    private transient String payloadHash;

    protected MailContent() throws ParseException {
        contentType = new ContentType("application/octet-stream");
    }

    public MailContent(byte[] bytes) throws ParseException {
        this(bytes, new ContentType("application/octet-stream"));
    }

    public MailContent(byte[] bytes, ContentType ctype) throws ParseException {
        this();
        if (ctype != null) {
            contentType = ctype;
        }
        payload = bytes;
        payloadHash = calculateHash(payload);
    }

    public byte[] getBytes() {
        return payload;
    }

    public String getContentType() {
        return contentType.toString();
    }

    protected String payloadHash() {
        return payloadHash;
    }

    @Override
    public String toString() {
        return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE).append("ContentType", getContentType())
                .append("payloadHash", payloadHash()).toString();
    }

    private static String calculateHash(byte[] b) {
        String result = null;
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(b);
            byte[] hash = md.digest();
            result = Conversion.byteArrayToBase64String(hash);
        } catch (Exception e) {
            ;
        }
        return result;
    }
}