core/src/main/java/org/apache/abdera2/extra/AbderaDataSource.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  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.  For additional information regarding
 * copyright in this work, please see the NOTICE file in the top level
 * directory of this distribution.
 */
package org.apache.abdera2.extra;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.activation.DataSource;

import org.apache.abdera2.model.Base;
import org.apache.abdera2.model.Element.Helper;

/**
 * Utility implementation of javax.activation.DataSource that wraps Abdera Base
 */
public final class AbderaDataSource implements DataSource {

    private final byte[] data;
    private final String mimetype;
    private final String name;

    public AbderaDataSource(Base base) {
        this.data = read(base);
        this.mimetype = Helper.getMimeType(base);
        this.name = base.getClass().getName();
    }

    private byte[] read(Base base) {
        byte[] data = null;
        try {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            base.writeTo(out);
            data = out.toByteArray();
        } catch (IOException e) {
        }
        return data;
    }

    public String getContentType() {
        return mimetype;
    }

    public InputStream getInputStream() throws IOException {
        return new ByteArrayInputStream(data);
    }

    public String getName() {
        return "Abdera Data Source::" + name;
    }

    public OutputStream getOutputStream() throws IOException {
        throw new UnsupportedOperationException();
    }

}