RendererUtils.java Source code

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Here is the source code for RendererUtils.java

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/*
 * 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.renderers;
    
import static org.apache.taverna.robundle.Bundles.getReference;
import static org.apache.taverna.robundle.Bundles.getStringValue;
import static org.apache.taverna.robundle.Bundles.isReference;
import static org.apache.taverna.databundle.DataBundles.isValue;
    
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
    
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
    
/**
 * @author David Withers
 */
public class RendererUtils {
    public static long getSizeInBytes(Path path) throws IOException {
        if (isValue(path))
            return Files.size(path);
        if (!isReference(path))
            throw new IllegalArgumentException("Path is not a value or reference");

        URL url = getReference(path).toURL();
        switch (url.getProtocol().toLowerCase()) {
        case "http":
        case "https":
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("HEAD");
            conn.connect();
            String contentLength = conn.getHeaderField("Content-Length");
            conn.disconnect();
            if (contentLength != null && !contentLength.isEmpty())
                return Long.parseLong(contentLength);
            return -1;
        case "file":
            return FileUtils.toFile(url).length();
        default:
            return -1;
        }
    }

    public static String getString(Path path) throws IOException {
        if (isValue(path))
            return getStringValue(path);
        else if (isReference(path))
            return IOUtils.toString(getReference(path));
        else
            throw new IllegalArgumentException("Path is not a value or reference");
    }

    public static InputStream getInputStream(Path path) throws MalformedURLException, IOException {
        if (isValue(path))
            return Files.newInputStream(path);
        else if (isReference(path))
            return getReference(path).toURL().openStream();
        else
            throw new IllegalArgumentException("Path is not a value or reference");
    }
}