taverna-file-api/src/main/java/org/apache/taverna/workbench/file/FileType.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information 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 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 org.apache.taverna.workbench.file;

/**
 * A filetype to identify a way to (de)serialise a {@link WorkflowBundle} with
 * the {@link FileManager}.
 * <p>
 * Two filetypes are considered equal if they share an extension or mime type or
 * are the same instance.
 * 
 * @see net.sf.taverna.t2.workbench.file.impl.WorkflowBundleFileType
 * @author Stian Soiland-Reyes
 */
public abstract class FileType {
	public abstract String getExtension();

	public abstract String getMimeType();

	public abstract String getDescription();

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean equals(Object obj) {
		if (obj == this)
			return true;
		if (!(obj instanceof FileType))
			return false;
		FileType other = (FileType) obj;
		if (getMimeType() != null && other.getMimeType() != null)
			return getMimeType().equalsIgnoreCase(other.getMimeType());
		if (getExtension() != null && other.getExtension() != null)
			return getExtension().equalsIgnoreCase(other.getExtension());
		return false;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public int hashCode() {
		int hash = 7;
		hash = 31 * hash + getExtension().hashCode();
		hash = 31 * hash + getMimeType().hashCode();
		return hash;
	}
}