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/*******************************************************************************
* Copyright (c) 2005, 2016 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ua.tests.util;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import org.osgi.framework.Bundle;
/*
* Utility methods for working with files.
*/
public class FileUtil {
/**
* Gets the contents of the file with the given relative path in the given bundle,
* as a String (file must be encoded as UTF-8).
*/
public static String getContents(Bundle bundle, String relativePath) throws IOException {
URL url = bundle.getEntry(relativePath);
if (url != null) {
return readString(url.openStream());
}
return null;
}
/**
* Gets the contents of the file with the given absolute path as a String (file must
* be encoded as UTF-8).
*/
public static String getContents(String absolutePath) throws IOException {
try (FileInputStream fis = new FileInputStream(absolutePath)) {
return readString(fis);
}
}
/**
* Generates a filename with path to the result file that will be generated
* for the intro xml referred to by the string.
*/
public static String getResultFile(String in) {
return in.substring(0, in.lastIndexOf('.')) + "_expected.txt";
}
/**
* Reads the contents of the input stream as UTF-8 and constructs and returns
* as a String.
*/
public static String readString(InputStream in) throws IOException {
try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
byte[] buffer = new byte[4096];
int num;
while ((num = in.read(buffer)) > 0) {
out.write(buffer, 0, num);
}
String result = new String(out.toByteArray(), StandardCharsets.UTF_8);
if (result.length() > 0) {
// filter windows-specific newline
result = result.replaceAll("\r", "");
}
// ignore whitespace at start or end
return result.trim();
}
}
}
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