com.eclipsesource.connect.test.util.FileHelper.java Source code

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Here is the source code for com.eclipsesource.connect.test.util.FileHelper.java

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/*******************************************************************************
 * Copyright (c) 2015 EclipseSource 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:
 *    Holger Staudacher - initial API and implementation, ongoing development
 ******************************************************************************/
package com.eclipsesource.connect.test.util;

import static com.google.common.base.Charsets.UTF_8;

import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;

import com.google.common.io.CharSource;

public class FileHelper {

    public static String readFile(ReaderSupplier reader) {
        try {
            return new CharSource() {

                @Override
                public Reader openStream() throws IOException {
                    return reader.getReader();
                }
            }.read();
        } catch (IOException e) {
            throw new IllegalStateException("Could not read file from reader lambda");
        }
    }

    public static String readFile(String name, Class<?> classPathProvider) {
        try {
            return new CharSource() {

                @Override
                public Reader openStream() throws IOException {
                    return new InputStreamReader(classPathProvider.getResourceAsStream(name), UTF_8);
                }
            }.read();
        } catch (IOException e) {
            throw new IllegalStateException(
                    "Could not read file " + name + " on classpath of " + classPathProvider.getName());
        }
    }

    private FileHelper() {
        // prevent instantiation
    }
}