Example usage for java.lang Class getResourceAsStream

Introduction

In this page you can find the example usage for java.lang Class getResourceAsStream.

Prototype

@CallerSensitive
public InputStream getResourceAsStream(String name)

Source Link

Document

Finds a resource with a given name.

Usage

From source file:ca.oson.json.util.ObjectUtil.java

public static String[] getParameterNames(Method m) throws IOException {
    Class<?> declaringClass = m.getDeclaringClass();
    String resourceName = "/" + declaringClass.getName().replace('.', '/') + ".class";
    InputStream classData = declaringClass.getResourceAsStream(resourceName);

    VariableReader variableDiscoverer = new VariableReader();

    ClassReader r = new ClassReader(classData);
    r.accept(variableDiscoverer, 0);//w  w  w  . j a v  a2 s .  co  m

    Map<Integer, String> variableNames = variableDiscoverer.getVariableNames(m);
    String[] parameterNames = new String[m.getParameterTypes().length];
    if (variableNames != null) {
        for (int i = 0; i < parameterNames.length; i++) {
            parameterNames[i] = variableNames.get(i);
        }
    }
    return parameterNames;
}

From source file:com.baeldung.file.FileOperationsTest.java

@Test
public void givenFileName_whenUsingJarFile_thenFileData() throws IOException {
    String expectedData = "BSD License";

    Class clazz = Matchers.class;
    InputStream inputStream = clazz.getResourceAsStream("/LICENSE.txt");
    String data = readFromInputStream(inputStream);

    Assert.assertThat(data.trim(), CoreMatchers.containsString(expectedData));
}

From source file:ch.entwine.weblounge.common.impl.util.TemplateUtils.java

/**
 * Loads the resource identified by concatenating the package name from
 * <code>clazz</code> and <code>path</code> from the classpath.
 * //from w ww  .ja  v  a2  s.  co  m
 * @param path
 *          the path relative to the package name of <code>clazz</code>
 * @param clazz
 *          the class
 * @param language
 *          the requested language
 * @param site
 *          the associated site
 * @return the resource
 */
public static String load(String path, Class<?> clazz, Language language, Site site) {
    if (path == null)
        throw new IllegalArgumentException("path cannot be null");
    if (clazz == null)
        throw new IllegalArgumentException("clazz cannot be null");

    String pkg = null;
    if (!path.startsWith("/"))
        pkg = "/" + clazz.getPackage().getName().replace('.', '/');

    // Try to find the template in any of the usual languages
    InputStream is = null;
    String[] templates = null;
    if (site != null)
        templates = LanguageUtils.getLanguageVariants(path, language, site.getDefaultLanguage());
    else
        templates = LanguageUtils.getLanguageVariants(path, language);
    for (String template : templates) {
        String pathToTemplate = pkg != null ? UrlUtils.concat(pkg, template) : template;
        is = clazz.getResourceAsStream(pathToTemplate);
        if (is != null) {
            path = template;
            break;
        }
    }

    // If is is still null, then the template doesn't exist.
    if (is == null) {
        logger.error("Template " + path + " not found in any language");
        return null;
    }

    // Load the template
    InputStreamReader isr = null;
    StringBuffer buf = new StringBuffer();
    try {
        logger.debug("Loading " + path);
        isr = new InputStreamReader(is, Charset.forName("UTF-8"));
        char[] chars = new char[1024];
        int count = 0;
        while ((count = isr.read(chars)) > 0) {
            for (int i = 0; i < count; i++)
                buf.append(chars[i]);
        }
        return buf.toString();
    } catch (Throwable t) {
        logger.warn("Error reading " + path + ": " + t.getMessage());
    } finally {
        IOUtils.closeQuietly(isr);
        IOUtils.closeQuietly(is);
    }
    logger.debug("Template " + path + " loaded");
    return null;
}

From source file:com.baeldung.file.FileOperationsManualTest.java

@Test
public void givenFileName_whenUsingJarFile_thenFileData() throws IOException {
    String expectedData = "BSD License";

    Class clazz = Matchers.class;
    InputStream inputStream = clazz.getResourceAsStream("/LICENSE.txt");
    String data = readFromInputStream(inputStream);

    assertThat(data.trim(), CoreMatchers.containsString(expectedData));
}

From source file:com.baeldung.file.FileOperationsUnitTest.java

@Test
public void givenFileNameAsAbsolutePath_whenUsingClasspath_thenFileData() throws IOException {
    String expectedData = "Hello World from fileTest.txt!!!";

    Class clazz = FileOperationsUnitTest.class;
    InputStream inputStream = clazz.getResourceAsStream("/fileTest.txt");
    String data = readFromInputStream(inputStream);

    Assert.assertEquals(expectedData, data.trim());
}

From source file:com.baeldung.file.FileOperationsTest.java

@Test
public void givenFileNameAsAbsolutePath_whenUsingClasspath_thenFileData() throws IOException {
    String expectedData = "Hello World from fileTest.txt!!!";

    Class clazz = FileOperationsTest.class;
    InputStream inputStream = clazz.getResourceAsStream("/fileTest.txt");
    String data = readFromInputStream(inputStream);

    Assert.assertEquals(expectedData, data.trim());
}

From source file:com.baeldung.file.FileOperationsManualTest.java

@Test
public void givenFileNameAsAbsolutePath_whenUsingClasspath_thenFileData() throws IOException {
    String expectedData = "Hello World from fileTest.txt!!!";

    Class clazz = FileOperationsManualTest.class;
    InputStream inputStream = clazz.getResourceAsStream("/fileTest.txt");
    String data = readFromInputStream(inputStream);

    assertEquals(expectedData, data.trim());
}

From source file:com.googlecode.wickedcharts.showcase.StringFromResourceModel.java

public StringFromResourceModel(Class<?> scope, String resourceName) {
    InputStream in = null;/*  www. ja  v a2 s .  c  om*/
    BufferedReader reader = null;
    try {
        in = scope.getResourceAsStream(resourceName);
        reader = new BufferedReader(new InputStreamReader(in));
        StringBuffer stringBuffer = new StringBuffer();
        String line;
        while ((line = reader.readLine()) != null) {
            stringBuffer.append(line);
            stringBuffer.append("\n");
        }
        this.modelObject = stringBuffer.toString();
    } catch (IOException e) {
        throw new RuntimeException(
                "Error reading resource '" + resourceName + "' from class '" + scope.getName() + "'.", e);
    } finally {
        IOUtils.closeQuietly(in);
        IOUtils.closeQuietly(reader);
    }
}

From source file:com.microsoft.tfs.core.internal.db.Configuration.java

public Configuration(final Class cls, final String resourceName) {
    InputStream input = null;// w  w  w. j a v  a 2s.co m
    try {
        input = cls.getResourceAsStream(resourceName);
        if (input != null) {
            props.load(input);
        } else {
            log.warn(MessageFormat.format("configuration [{0}] from class [{1}] does not exist", //$NON-NLS-1$
                    resourceName, cls.getName()));
        }
    } catch (final IOException ex) {
        log.warn(
                MessageFormat.format("error loading configuration [{0}] from class [{1}]", resourceName, //$NON-NLS-1$
                        cls.getName()), ex);
    } finally {
        if (input != null) {
            try {
                input.close();
            } catch (final IOException e) {
                log.warn(MessageFormat.format("error closing configuration [{0}] from class [{1}]", //$NON-NLS-1$
                        resourceName, cls.getName()), e);
            }
        }
    }
}

From source file:org.eclipse.emf.teneo.annotations.mapper.PersistenceFileProvider.java

/**
 * Returns an InputStream with the file content, note if the file does not exist then null may
 * be returned. This implementation searches for the file in the classpath using the path
 * parameters.//from   ww  w.j  a  va2s .c om
 * 
 * Custom implementations of this class may use any other method to find the file.
 * 
 * @param clz
 *            the class to use when reading the file through a classloader
 * @param path
 *            the path to the file (incl. the filename and extension)
 * 
 * @return an InputStream if found, or null otherwise
 */
public InputStream getFileContent(Class<?> clz, String path) {
    if (clz == null) {
        return this.getClass().getClassLoader().getResourceAsStream(path);
    } else {
        return clz.getResourceAsStream(path);
    }
}