dom/src/main/java/org/apache/james/mime4j/message/MessageServiceFactoryImpl.java

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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
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package org.apache.james.mime4j.message;

import org.apache.james.mime4j.dom.MessageBuilder;
import org.apache.james.mime4j.dom.MessageServiceFactory;
import org.apache.james.mime4j.dom.MessageFormatter;
import org.apache.james.mime4j.storage.StorageProvider;
import org.apache.james.mime4j.stream.MimeEntityConfig;
import org.apache.james.mime4j.stream.MutableBodyDescriptorFactory;

/**
 * The default MessageBuilderFactory bundled with Mime4j.
 * 
 * Supports the "StorageProvider", "MimeEntityConfig" and "MutableBodyDescriptorFactory"
 * attributes.
 */
public class MessageServiceFactoryImpl extends MessageServiceFactory {

    private StorageProvider storageProvider = null;
    private MimeEntityConfig mimeEntityConfig = null;
    private MutableBodyDescriptorFactory mutableBodyDescriptorFactory = null;

    @Override
    public MessageBuilder newMessageBuilder() {
        MessageBuilderImpl m = new MessageBuilderImpl();
        if (storageProvider != null) m.setStorageProvider(storageProvider);
        if (mimeEntityConfig != null) m.setMimeEntityConfig(mimeEntityConfig);
        if (mutableBodyDescriptorFactory != null) m.setMutableBodyDescriptorFactory(mutableBodyDescriptorFactory);
        return m;
    }

    @Override
    public MessageFormatter newMessageFormatter() {
        MessageFormatterImpl m = new MessageFormatterImpl();
        return m;
    }
    
    @Override
    public void setAttribute(String name, Object value)
            throws IllegalArgumentException {
        if ("StorageProvider".equals(name)) {
            if (value instanceof StorageProvider) {
                this.storageProvider  = (StorageProvider) value;
                return;
            } else throw new IllegalArgumentException("Unsupported attribute value type for "+name+", expected a StorageProvider");
        } else if ("MimeEntityConfig".equals(name)) {
            if (value instanceof MimeEntityConfig) {
                this.mimeEntityConfig = (MimeEntityConfig) value;
                return;
            } else throw new IllegalArgumentException("Unsupported attribute value type for "+name+", expected a MimeEntityConfig");
        } else if ("MutableBodyDescriptorFactory".equals(name)) {
            if (value instanceof MutableBodyDescriptorFactory) {
                this.mutableBodyDescriptorFactory  = (MutableBodyDescriptorFactory) value;
                return;
            } else throw new IllegalArgumentException("Unsupported attribute value type for "+name+", expected a MutableBodyDescriptorFactory");
        }
            
        throw new IllegalArgumentException("Unsupported attribute: "+name);
        
    }

}