at.molindo.notify.model.Message.java Source code

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Here is the source code for at.molindo.notify.model.Message.java

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/**
 * Copyright 2010 Molindo GmbH
 *
 * 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 at.molindo.notify.model;

import java.util.Map;
import java.util.Set;

import at.molindo.notify.render.IRenderService;
import at.molindo.notify.render.IRenderService.RenderException;
import at.molindo.notify.render.IRenderService.Type;
import at.molindo.notify.util.NotifyUtils;
import at.molindo.utils.data.StringUtils;

import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;

public class Message {

    private static final String FIELD_SUBJECT = "Subject";

    private static final ImmutableSet<String> REQUIRED_FIELDS = ImmutableSet.of(FIELD_SUBJECT);
    private static final ImmutableSet<String> SUPPORTED_FIELDS = ImmutableSet.of(FIELD_SUBJECT);

    private Type _type = Type.HTML;
    private String _subject;
    private String _message;

    public static Message parse(String str, IRenderService.Type type) throws RenderException {

        Set<String> required = Sets.newHashSet(REQUIRED_FIELDS);
        Map<String, String> fieldValues = Maps.newHashMap();

        Message rendered = new Message();
        rendered.setType(type);

        StringBuilder body = null;
        for (String line : StringUtils.split(str, "\n")) {
            if (body == null) {
                if (StringUtils.empty(StringUtils.trim(line))) {
                    body = new StringBuilder();
                } else {
                    int split = line.indexOf(':');
                    if (split < 0) {
                        throw new RenderException("illegal line: " + line);
                    }
                    String fieldName = line.substring(0, split).trim();
                    String fieldValue = line.substring(split + 1).trim();

                    if (!SUPPORTED_FIELDS.contains(fieldName)) {
                        throw new RenderException("unknown field: " + fieldName);
                    }

                    fieldValues.put(fieldName, fieldValue);
                }
            } else if (body.length() > 0 || !StringUtils.empty(StringUtils.trim(line))) {
                body.append(line).append("\n");
            }
        }

        required.removeAll(fieldValues.keySet());
        if (required.size() > 0) {
            throw new RenderException("missing fields: " + required);
        }

        if (body == null || body.length() == 0) {
            throw new RenderException("empty body");
        }
        // remove trailing \n
        body.setLength(body.length() - 1);

        rendered.setSubject(fieldValues.get(FIELD_SUBJECT));
        rendered.setMessage(body.toString());

        return rendered;
    }

    public Message() {

    }

    public Message(String subject, String message, Type type) {
        setType(type);
        setSubject(subject);
        setMessage(message);
    }

    public Type getType() {
        return _type;
    }

    public void setType(Type type) {
        if (type == null) {
            throw new NullPointerException("type");
        }
        _type = type;
    }

    public String getSubject() {
        return _subject;
    }

    public void setSubject(String subject) {
        _subject = subject;
    }

    public String getMessage() {
        return _message;
    }

    public void setMessage(String message) {
        _message = message;
    }

    public String getText() {
        if (getType() == Type.HTML) {
            return NotifyUtils.html2text(getMessage());
        } else {
            return getMessage();
        }
    }

    public String getHtml() {
        if (getType() == Type.TEXT) {
            return NotifyUtils.text2html(getMessage());
        } else {
            return getMessage();
        }
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + (getSubject() == null ? 0 : getSubject().hashCode());
        result = prime * result + (getType() == null ? 0 : getType().hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof Message)) {
            return false;
        }
        Message other = (Message) obj;
        if (getType() != other.getType()) {
            return false;
        }
        if (getSubject() == null) {
            if (other.getSubject() != null) {
                return false;
            }
        } else if (!getSubject().equals(other.getSubject())) {
            return false;
        }
        if (getMessage() == null) {
            if (other.getMessage() != null) {
                return false;
            }
        } else if (!getMessage().equals(other.getMessage())) {
            return false;
        }

        return true;
    }

    @Override
    public String toString() {
        return "Message [type=" + getType() + ", subject=" + getSubject() + ", message=" + getMessage() + "]";
    }

}