org.infinitest.eclipse.InfinitestCoreClasspath.java Source code

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Here is the source code for org.infinitest.eclipse.InfinitestCoreClasspath.java

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/*
 * Infinitest, a Continuous Test Runner.
 *
 * Copyright (C) 2010-2013
 * "Ben Rady" <benrady@gmail.com>,
 * "Rod Coffin" <rfciii@gmail.com>,
 * "Ryan Breidenbach" <ryan.breidenbach@gmail.com>
 * "David Gageot" <david@gageot.net>, et al.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.infinitest.eclipse;

import static java.util.logging.Level.*;
import static org.infinitest.util.InfinitestUtils.*;

import java.io.*;
import java.net.*;
import java.util.*;

import com.google.common.io.*;

public class InfinitestCoreClasspath {
    private static File jarFile;

    public static File getCoreJarLocation(InfinitestPlugin plugin) {
        if ((jarFile != null) && jarFile.exists()) {
            return jarFile;
        }

        File tempDir = new File(System.getProperty("java.io.tmpdir"));
        jarFile = getNonConflictingJarFile(tempDir);
        if (!jarFile.getParentFile().exists()) {
            log(SEVERE, "No parent directory for " + jarFile);
            throw new IllegalStateException("No parent directory for " + jarFile);
        }

        writeJar(jarFile, plugin);

        return jarFile;
    }

    private static File getNonConflictingJarFile(File tempDir) {
        File proposedFile = new File(tempDir, "infinitest.jar");
        while (proposedFile.exists()) {
            proposedFile = new File(tempDir, "infinitest" + randInt() + ".jar");
        }
        proposedFile.deleteOnExit();
        return proposedFile;
    }

    private static int randInt() {
        return (int) (Math.random() * Integer.MAX_VALUE);
    }

    private static void writeJar(File coreJarLocation, InfinitestPlugin plugin) {
        // Only for tests ->
        if (plugin != null)
        // <-
        {
            Enumeration<?> e = plugin.getPluginBundle().findEntries("", "*infinitest-runner*.jar", true);

            if (e == null) {
                log(SEVERE, "Error creating testrunner classpath. Cannot find infinitest core bundle");
            } else {
                while (e.hasMoreElements()) {
                    URL url = (URL) e.nextElement();
                    try {
                        Resources.asByteSource(url).copyTo(Files.asByteSink(coreJarLocation));
                    } catch (IOException e1) {
                        log(SEVERE, "Error creating testrunner classpath. Could not write to " + coreJarLocation);
                        throw new RuntimeException(e1);
                    }
                }
            }
        }
    }
}