Example usage for java.lang ClassLoader getResource

Introduction

In this page you can find the example usage for java.lang ClassLoader getResource.

Prototype

public URL getResource(String name) 

Source Link

Document

Finds the resource with the given name.

Usage

From source file:com.publicuhc.pluginframework.util.YamlUtil.java

/**
 * Attempts to pull a Yaml file from the JAR
 *
 * @param path the path to check for/*  ww  w  .j  a va 2s  . c o  m*/
 * @param loader the classloader to look in
 * @return optional. Present if found, null if not
 *
 * @throws IOException
 * @throws InvalidConfigurationException if the file can't be parsed
 */
public static Optional<YamlConfiguration> loadYamlFromJAR(String path, ClassLoader loader)
        throws IOException, InvalidConfigurationException {
    Validate.notNull(path, "Path to file cannot be null");

    URL url = loader.getResource(path);

    if (url == null) {
        return Optional.absent();
    }

    StringBuilder builder = new StringBuilder();
    CharStreams.copy(Resources.newReaderSupplier(url, Charsets.UTF_8), builder);

    return Optional.of(loadYamlFromString(builder.toString()));
}

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From source file:eu.planets_project.services.utils.cli.CliMigrationPaths.java

/**
 * @param resourceName The XML file containing the path configuration
 * @return The paths defined in the XML file
 * @throws ParserConfigurationException//from  ww  w  .j a  va  2 s .co m
 * @throws IOException
 * @throws SAXException
 * @throws URISyntaxException
 */
// TODO: Clean up this exception-mess. Something like "InitialisationException" or "ConfigurationErrorException" should cover all these exceptions.
public static CliMigrationPaths initialiseFromFile(String resourceName)
        throws ParserConfigurationException, IOException, SAXException, URISyntaxException {

    InputStream instream;

    ClassLoader loader = Thread.currentThread().getContextClassLoader();
    URL resourceURL = loader.getResource(resourceName);
    if (new File(defaultPath, resourceName).isFile()) {
        instream = new FileInputStream(new File(defaultPath, resourceName));
    } else if (new File(resourceName).isFile()) {
        instream = new FileInputStream(new File(resourceName));
    } else if (resourceURL != null) {
        instream = resourceURL.openStream();
    } else {
        String msg = String.format("Could not locate resource %s", resourceName);
        throw new FileNotFoundException(msg);
    }

    CliMigrationPaths paths = new CliMigrationPaths();

    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

    DocumentBuilder builder = dbf.newDocumentBuilder();
    Document doc = builder.parse(instream);

    Element fileformats = doc.getDocumentElement();
    if (fileformats != null) {
        NodeList children = fileformats.getChildNodes();
        for (int i = 0; i < children.getLength(); i++) {
            Node child = children.item(i);
            if (child.getNodeType() == Node.ELEMENT_NODE) {
                if (child.getNodeName().equals("path")) {
                    CliMigrationPath pathdef = decodePathNode(child);
                    paths.add(pathdef);
                }
            }
        }
    }
    IOUtils.closeQuietly(instream);
    return paths;
}

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From source file:org.zalando.problem.ProblemMixInTest.java

private static URL getResource(final String name) {
    final ClassLoader loader = Thread.currentThread().getContextClassLoader();
    return Objects.requireNonNull(loader.getResource(name), () -> "resource " + name + " not found.");
}

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From source file:net.ymate.platform.commons.util.ResourceUtils.java

/**
 * //from w  ww.  j a  v a2 s . c  o  m
 * @param resourceName
 * @param callingClass
 * @return
 */
public static URL getResource(String resourceName, Class<?> callingClass) {
    URL url = Thread.currentThread().getContextClassLoader().getResource(resourceName);
    if (url == null) {
        url = ClassUtils.getDefaultClassLoader().getResource(resourceName);
    }
    if (url == null) {
        url = callingClass.getResource(resourceName);
        if (url == null) {
            ClassLoader cl = callingClass.getClassLoader();
            if (cl != null) {
                url = cl.getResource(resourceName);
            }
        }
    }
    if ((url == null) && (resourceName != null)
            && (((resourceName.length() == 0) || (resourceName.charAt(0) != '/')))) {
        return getResource('/' + resourceName, callingClass);
    }
    return url;
}

---

From source file:org.apache.hadoop.security.ProviderUtils.java

/**
 * The password is either found in the environment or in a file. This
 * routine implements the logic for locating the password in these
 * locations.//from  w  w w  .j  a  va 2s  .  co m
 *
 * @param envWithPass  The name of the environment variable that might
 *                     contain the password. Must not be null.
 * @param fileWithPass The name of a file that could contain the password.
 *                     Can be null.
 * @return The password as a char []; null if not found.
 * @throws IOException If fileWithPass is non-null and points to a
 * nonexistent file or a file that fails to open and be read properly.
 */
public static char[] locatePassword(String envWithPass, String fileWithPass) throws IOException {
    char[] pass = null;
    if (System.getenv().containsKey(envWithPass)) {
        pass = System.getenv(envWithPass).toCharArray();
    }
    if (pass == null) {
        if (fileWithPass != null) {
            ClassLoader cl = Thread.currentThread().getContextClassLoader();
            URL pwdFile = cl.getResource(fileWithPass);
            if (pwdFile == null) {
                // Provided Password file does not exist
                throw new IOException("Password file does not exist");
            }
            try (InputStream is = pwdFile.openStream()) {
                pass = IOUtils.toString(is).trim().toCharArray();
            }
        }
    }
    return pass;
}

---

From source file:io.apiman.gateway.engine.jdbc.JdbcMetricsTest.java

/**
 * Initialize the DB with the apiman gateway DDL.
 * @param connection//from  w ww.  j ava 2s .  c o  m
 */
private static void initDB(Connection connection) throws Exception {
    ClassLoader cl = JdbcMetricsTest.class.getClassLoader();
    URL resource = cl.getResource("ddls/apiman-gateway_h2.ddl");
    try (InputStream is = resource.openStream()) {
        System.out.println("=======================================");
        System.out.println("Initializing database.");
        DdlParser ddlParser = new DdlParser();
        List<String> statements = ddlParser.parse(is);
        for (String sql : statements) {
            System.out.println(sql);
            PreparedStatement statement = connection.prepareStatement(sql);
            statement.execute();
        }
        System.out.println("=======================================");
    }
}

---

From source file:ResourcesUtils.java

/**
 * Returns the URL of the resource on the classpath
 * //from   www. j  a v a2s  .  c o  m
 * @param resource
 *            The resource to find
 * @throws IOException
 *             If the resource cannot be found or read
 * @return The resource
 */
public static URL getResourceURL(String resource) throws IOException {
    URL url = null;
    ClassLoader loader = ResourcesUtils.class.getClassLoader();
    if (loader != null) {
        url = loader.getResource(resource);
    }
    if (url == null) {
        url = ClassLoader.getSystemResource(resource);
    }
    if (url == null) {
        throw new IOException("Could not find resource " + resource);
    }
    return url;
}

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From source file:com.sonicle.webtop.core.app.util.LogbackHelper.java

public static void writeProperties(ClassLoader classLoader, Properties properties)
        throws IOException, URISyntaxException {
    FileOutputStream out = null;//ww  w.j  av  a2 s .c  o m
    try {
        out = new FileOutputStream(new File(classLoader.getResource(LOGBACK_PROPERTIES_FILE).toURI()));
        properties.store(out, "");
    } finally {
        IOUtils.close(out);
    }
}

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From source file:org.apache.axis2.metadata.registry.MetadataFactoryRegistry.java

/**
 * This method will load a file, if it exists, that contains a list
 * of interfaces and custom implementations. This allows for non-
 * programmatic registration of custom interface implementations
 * with the MDQ layer./*from  w  ww.ja v  a2 s.  co  m*/
 */
private static void loadConfigFromFile() {
    String pairSeparator = "|";
    try {
        ClassLoader classLoader = getContextClassLoader(null);
        URL url = null;
        url = classLoader.getResource(configurationFileLoc);
        if (url == null) {
            File file = new File(configurationFileLoc);
            url = file.toURL();
        }
        // the presence of this file is optional
        if (url != null) {
            if (log.isDebugEnabled()) {
                log.debug("Found URL to MetadataFactoryRegistry configuration file: " + configurationFileLoc);
            }
            BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
            String line = reader.readLine();

            // the separator of the file is the '|' character
            // to the left of the separator will be the interface and
            // to the right will be the custom implementation
            if (line != null && line.indexOf("|") != -1) {
                String interfaceName = line.substring(0, line.indexOf(pairSeparator));
                String implName = line.substring(line.indexOf(pairSeparator) + 1, line.length());
                if (log.isDebugEnabled()) {
                    log.debug("For registered class: " + interfaceName + " the "
                            + "following implementation was found: " + implName);
                }
                Class intf = classLoader.loadClass(interfaceName);
                Class impl = classLoader.loadClass(implName);

                // if we could load both we need to register them with our
                // internal registry
                if (intf != null && impl != null) {
                    if (log.isDebugEnabled()) {
                        log.debug("Loaded both interface and implementation class: " + interfaceName + ":"
                                + implName);
                    }
                    if (impl.getEnclosingClass() == null) {
                        table.put(intf, impl.newInstance());
                    } else {
                        if (log.isWarnEnabled()) {
                            log.warn("The implementation class: " + impl.getClass().getName()
                                    + " could not be lregistered because it is an inner class. "
                                    + "In order to register file-based overrides, implementations "
                                    + "must be public outer classes.");
                        }
                    }
                } else {
                    if (log.isDebugEnabled()) {
                        log.debug("Could not load both interface and implementation class: " + interfaceName
                                + ":" + implName);
                    }
                }
            } else {
                if (log.isDebugEnabled()) {
                    log.debug("Did not find File for MetadataFactoryRegistry configuration " + "file: "
                            + configurationFileLoc);
                }
            }
        } else {
            if (log.isDebugEnabled()) {
                log.debug("Did not find URL for MetadataFactoryRegistry configuration " + "file: "
                        + configurationFileLoc);
            }
        }
    } catch (Throwable t) {
        if (log.isDebugEnabled()) {
            log.debug("The MetadataFactoryRegistry could not process the configuration file: "
                    + configurationFileLoc + " because of the following error: " + t.toString());
        }
    }
}

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From source file:com.netsteadfast.greenstep.bsc.util.BscReportSupportUtils.java

public static byte[] getByteIcon(KpiVO kpi, float score) throws Exception {
    byte[] datas = null;
    SysExpressionVO sysExpression = exprThreadLocal02.get();
    if (null == sysExpression) {
        return datas;
    }/*from ww w . ja  v  a2 s  .  c om*/
    Map<String, Object> parameters = new HashMap<String, Object>();
    Map<String, Object> results = new HashMap<String, Object>();
    parameters.put("kpi", kpi);
    parameters.put("score", score);
    results.put("icon", " ");
    ScriptExpressionUtils.execute(sysExpression.getType(), sysExpression.getContent(), results, parameters);
    String iconResource = (String) results.get("icon");
    ClassLoader classLoader = BscReportSupportUtils.class.getClassLoader();
    datas = IOUtils.toByteArray(classLoader.getResource(iconResource).openStream());
    return datas;
}

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