Java tutorial
// Copyright 2004-2005 ASERT. Released under the Canoo Webtest license. package com.canoo.webtest.boundary; import com.canoo.webtest.engine.StepExecutionException; import com.canoo.webtest.engine.Context; import com.canoo.webtest.steps.Step; import org.apache.log4j.Logger; import org.apache.commons.io.IOUtils; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.ObjectInputStream; /** * Helper class for working with streams. * * @author Paul King */ public final class StreamBoundary { private static final Logger LOG = Logger.getLogger(StreamBoundary.class); private StreamBoundary() { } /** * Close an InputStream ignoring an errors. * * Wraps IOException's. * * @param inStream */ public static void closeInputStream(final InputStream inStream) { if (inStream != null) { try { inStream.close(); } catch (IOException e) { LOG.warn("Error closing stream: " + e.getMessage(), e); } } } /** * Close an OutputStream ignoring an errors. * * Wraps IOException's. * * @param outStream */ public static void closeOutputStream(final OutputStream outStream) { if (outStream != null) { try { outStream.close(); } catch (IOException e) { LOG.warn("Error closing stream: " + e.getMessage(), e); } } } /** * Close an InputStream and abort step if an error occur. * * Wraps IOException's. * * @param is * @param step */ public static void tryCloseInputStreamWithFail(final InputStream is, final Step step) { if (is != null) { try { is.close(); } catch (IOException e) { LOG.error(e.getMessage(), e); throw new StepExecutionException("Error closing stream: " + e.getMessage(), step); } } } /** * Close an OutputStream and abort step if an error occur. * * Wraps IOException's. * * @param os * @param step */ public static void tryCloseOutputStream(final OutputStream os, final Step step) { if (os != null) { try { os.close(); } catch (IOException e) { LOG.error(e.getMessage(), e); throw new StepExecutionException("Error closing stream: " + e.getMessage(), step); } } } public static Object tryReadObject(final ObjectInputStream ois, final Step step) throws IOException { try { return ois.readObject(); } catch (ClassNotFoundException e) { LOG.error(e.getMessage(), e); throw new StepExecutionException("Error reading object from file: " + e.getMessage(), step); } } public static byte[] tryGetBytes(final Context context, final Step step) { try { return IOUtils.toByteArray(context.getCurrentResponse().getWebResponse().getContentAsStream()); } catch (IOException e) { throw new StepExecutionException("Error processing content: " + e.getMessage(), step); } } }