Example usage for com.google.common.base Preconditions checkArgument

Introduction

In this page you can find the example usage for com.google.common.base Preconditions checkArgument.

Prototype

public static void checkArgument(boolean expression, @Nullable Object errorMessage)

Source Link

Document

Ensures the truth of an expression involving one or more parameters to the calling method.

Usage

From source file:org.apache.james.jmap.utils.DownloadPath.java

public static DownloadPath from(String path) {
    Preconditions.checkArgument(!Strings.isNullOrEmpty(path), "'path' is mandatory");

    // path =  /blobId/name
    // idx  = 0 1      2
    List<String> pathVariables = Splitter.on('/').splitToList(path);
    Preconditions.checkArgument(pathVariables.size() >= 1 && pathVariables.size() <= 3,
            "'blobId' is mandatory");

    String blobId = Iterables.get(pathVariables, 1, null);
    Preconditions.checkArgument(!Strings.isNullOrEmpty(blobId), "'blobId' is mandatory");

    return new DownloadPath(blobId, name(pathVariables));
}

From source file:net.sf.derquinsej.Types.java

/**
 * Returns the actual type arguments of the generic superclass of the
 * provided class./*from www .  j  a  v  a  2  s.c  om*/
 * @param subclass Class to process.
 * @return The type arguments of the generic superclass.
 * @throws IllegalArgumentException if the superclass is not a parametrized
 *             type.
 */
public static Type[] getSuperclassTypeArguments(Class<?> subclass) {
    final Type superclass = subclass.getGenericSuperclass();
    Preconditions.checkArgument(superclass instanceof ParameterizedType, "Missing type parameter.");
    final ParameterizedType parameterized = (ParameterizedType) superclass;
    return parameterized.getActualTypeArguments();
}

From source file:com.zaradai.kunzite.optimizer.control.OptimizeRequest.java

public static OptimizeRequest newRequest(Class<? extends OptimizerTactic> tactic, String target,
        boolean lookForMaxima, InputRow start) {
    Preconditions.checkNotNull(tactic, "Invalid tactic specified");
    Preconditions.checkArgument(!Strings.isNullOrEmpty(target), "No target specified");
    Preconditions.checkNotNull(start, "No start position specified");

    return new OptimizeRequest(tactic, target, lookForMaxima, start);
}

From source file:org.bigmouth.nvwa.spring.boot.SpringBootstrap.java

public static ClassPathXmlApplicationContext bootUsingSpring(String systemFlag, String[] contextFilePathes,
        String[] systemParameters) {
    Preconditions.checkArgument(StringUtils.isNotBlank(systemFlag), "systemFlag is blank.");
    Preconditions.checkArgument((!ArrayUtils.isEmpty(contextFilePathes)) && (contextFilePathes.length > 0),
            "contextFilePathes is empty.");

    long beginMTime = System.currentTimeMillis();
    JVMUtils.setProperties(systemParameters);
    try {/*w  ww .j av a  2  s.com*/
        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext(contextFilePathes);
        //            ctx.registerShutdownHook();
        LOGGER.info(systemFlag + " boot in " + (System.currentTimeMillis() - beginMTime) + " ms");
        return ctx;

    } catch (Exception e) {
        LOGGER.error(systemFlag + " boot occur error:", e);
        System.exit(-1);
        return null;
    }
}

From source file:com.google.copybara.util.DiffUtil.java

/**
 * Calculates the diff between two sibling directory trees.
 *
 * <p>Returns the diff as an encoding-independent {@code byte[]} that can be write to a file or
 * fed directly into {@link DiffUtil#patch}.
 *//*from w  w w .  j  a  v a 2  s  . c  o m*/
public static byte[] diff(Path one, Path other, boolean verbose) throws IOException {
    Preconditions.checkArgument(one.getParent().equals(other.getParent()),
            "Paths 'one' and 'other' must be sibling directories.");
    Path root = one.getParent();
    String[] params = new String[] { "git", "diff", "--no-color", root.relativize(one).toString(),
            root.relativize(other).toString() };
    Command cmd = new Command(params, /*envVars*/ null, root.toFile());
    try {
        CommandUtil.executeCommand(cmd, verbose);
        return EMPTY_DIFF;
    } catch (BadExitStatusWithOutputException e) {
        CommandOutput output = e.getOutput();
        // git diff returns exit status 0 when contents are identical, or 1 when they are different
        if (!Strings.isNullOrEmpty(output.getStderr())) {
            throw new IOException(
                    "Error executing 'git diff': " + e.getMessage() + ". Stderr: \n" + output.getStderr(), e);
        }
        return output.getStdoutBytes();
    } catch (CommandException e) {
        throw new IOException("Error executing 'patch'", e);
    }
}

From source file:com.facebook.buck.jvm.java.intellij.DependencyType.java

public static DependencyType merge(DependencyType left, DependencyType right) {
    if (left.equals(right)) {
        return left;
    }//from  w  w w.  j a  va  2s.c om
    Preconditions.checkArgument(!left.equals(COMPILED_SHADOW) && !right.equals(COMPILED_SHADOW),
            "The COMPILED_SHADOW type cannot be merged with other types.");
    return DependencyType.PROD;
}

From source file:com.qcadoo.mes.orders.constants.OrderType.java

public static OrderType of(final Entity orderEntity) {
    Preconditions.checkArgument(orderEntity != null, "Missing entity");
    return parseString(orderEntity.getStringField(OrderFields.ORDER_TYPE));
}

From source file:org.apache.james.mdn.fields.Text.java

public static Text fromRawText(String rawText) {
    Preconditions.checkNotNull(rawText);
    String trimmedText = rawText.trim();
    Preconditions.checkArgument(!trimmedText.isEmpty(), "Text should not be empty");

    return new Text(replaceLineBreaksByContinuation(trimmedText));
}

From source file:org.opendaylight.protocol.pcep.impl.subobject.AsNumberCaseParser.java

static AsNumberCase parseSubobject(final ByteBuf buffer) throws PCEPDeserializerException {
    Preconditions.checkArgument(buffer != null && buffer.isReadable(),
            "Array of bytes is mandatory. Can't be null or empty.");
    if (buffer.readableBytes() != CONTENT_LENGTH) {
        throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes()
                + "; Expected: " + CONTENT_LENGTH + ".");
    }//ww w  . j  a  va2  s . c  o m
    return new AsNumberCaseBuilder()
            .setAsNumber(
                    new AsNumberBuilder().setAsNumber(new AsNumber((long) buffer.readUnsignedShort())).build())
            .build();
}

From source file:org.voltdb.utils.Digester.java

final public static String sha1AsBase64(final String str) {
    Preconditions.checkArgument(str != null, "specified null string");
    return sha1AsBase64(str.getBytes(Charsets.UTF_8));
}