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 String errorMessageTemplate,
        @Nullable Object... errorMessageArgs) 

Source Link

Document

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

Usage

From source file:com.google.walkaround.slob.server.ChangeDataSerializer.java

public static JSONObject dataToClientJson(ChangeData<String> data, long resultingRevision) {
    Preconditions.checkArgument(resultingRevision <= MAX_DOUBLE_INTEGER, "Resulting revision %s is too large",
            resultingRevision);/*from w  w w.  jav a2s.c om*/

    // Assume payload is JSON, and parse it to avoid nested json.
    // TODO(danilatos): Consider using ChangeData<JSONObject> instead.
    // The reason I haven't done it yet is because it's not immutable,
    // and also for reasons described in ChangeData.
    JSONObject payloadJson;
    try {
        payloadJson = new JSONObject(data.getPayload());
    } catch (JSONException e) {
        throw new IllegalArgumentException("Invalid payload for " + data, e);
    }

    JSONObject json = new JSONObject();
    try {
        Preconditions.checkArgument(resultingRevision >= 0, "invalid rev %s", resultingRevision);
        json.put("revision", resultingRevision);
        long sanityCheck = json.getLong("revision");
        if (sanityCheck != resultingRevision) {
            throw new AssertionError("resultingRevision " + resultingRevision
                    + " not losslessly represented in JSON, got back " + sanityCheck);
        }
        json.put("sid", data.getClientId().getId());
        json.put("op", payloadJson);
        return json;
    } catch (JSONException e) {
        throw new Error(e);
    }
}

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From source file:org.janusgraph.core.util.JanusGraphId.java

/**
 * Converts a user provided long id into a JanusGraph vertex id. The id must be positive and can be at most 61 bits long.
 * This method is useful when providing ids during vertex creation via {@link com.tinkerpop.gremlin.structure.Graph#addVertex(Object)}.
 *
 * @param id long id//from w  w  w . j  a  v a  2 s.  co m
 * @return a corresponding JanusGraph vertex id
 */
public static final long toVertexId(long id) {
    Preconditions.checkArgument(id > 0, "Vertex id must be positive: %s", id);
    Preconditions.checkArgument(IDManager.VertexIDType.NormalVertex.removePadding(Long.MAX_VALUE) >= id,
            "Vertex id is too large: %s", id);
    return IDManager.VertexIDType.NormalVertex.addPadding(id);
}

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From source file:com.janeluo.jfinalplus.kit.ModelKit.java

@SuppressWarnings("rawtypes")
public static Model set(Model model, Object... attrsAndValues) {
    int length = attrsAndValues.length;
    Preconditions.checkArgument(length % 2 == 0, "attrsAndValues length must be even number", length);
    for (int i = 0; i < length; i = i + 2) {
        Object attr = attrsAndValues[i];
        Preconditions.checkArgument(attr instanceof String, "the odd number of attrsAndValues  must be String");
        model.set((String) attr, attrsAndValues[i + 1]);
    }//  w  ww. j  av  a2  s.c om
    return model;
}

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From source file:com.cisco.oss.foundation.directory.utils.DirectoryUtils.java

/**
 * Delete the files in directory./*from w  w  w.  j  a  v  a 2s .co m*/
 *
 * @param directory
 * @throws IOException
 */
public static void deleteDirectoryContents(File directory) throws IOException {
    Preconditions.checkArgument(directory.isDirectory(), "Not a directory: %s", directory);
    File[] files = directory.listFiles();
    if (files == null) {
        throw new IOException("Error listing files for " + directory);
    }
    for (File file : files) {
        deleteRecursively(file);
    }
}

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From source file:org.locationtech.geogig.osm.internal.log.OSMLogEntry.java

public static OSMLogEntry valueOf(String s) {
    String[] tokens = s.split("\t");
    Preconditions.checkArgument(tokens.length == 3, "wrong OSM log entry definition: %s", s);
    ObjectId id = ObjectId.valueOf(tokens[0]);
    try {/* w ww  . ja  v  a 2  s.c  o m*/
        long changeset = Long.parseLong(tokens[1]);
        long timestamp = Long.parseLong(tokens[2]);
        return new OSMLogEntry(id, changeset, timestamp);
    } catch (NumberFormatException e) {
        throw new IllegalArgumentException("wrong OSM log entry definition: " + s);
    }
}

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From source file:org.opendaylight.yangtools.sal.java.api.generator.TypeUtils.java

/**
 * Given a {@link Type} object lookup the base Java type which sits at the top
 * of its type hierarchy.//www. j av  a  2  s  . c  o  m
 *
 * @param type Input Type object
 * @return Resolved {@link ConcreteType} instance.
 */
static ConcreteType getBaseYangType(@Nonnull final Type type) {
    // Already the correct type
    if (type instanceof ConcreteType) {
        return (ConcreteType) type;
    }

    Preconditions.checkArgument(type instanceof GeneratedTransferObject, "Unsupported type %s", type);

    // Need to walk up the GTO chain to the root
    GeneratedTransferObject rootGto = (GeneratedTransferObject) type;
    while (rootGto.getSuperType() != null) {
        rootGto = rootGto.getSuperType();
    }

    // Look for the 'value' property and return its type
    for (GeneratedProperty s : rootGto.getProperties()) {
        if (VALUE_PROP.equals(s.getName())) {
            return (ConcreteType) s.getReturnType();
        }
    }

    // Should never happen
    throw new IllegalArgumentException(String.format("Type %s root %s properties %s do not include \"%s\"",
            type, rootGto, rootGto.getProperties(), VALUE_PROP));
}

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From source file:com.google.copybara.git.GitAuthorParser.java

/**
 * Parses a Git author {@code string} into an {@link Author}.
 *///from  ww  w . j ava  2s  .  c o m
static Author parse(String author) {
    Preconditions.checkNotNull(author);
    Matcher matcher = AUTHOR_PATTERN.matcher(author);
    Preconditions.checkArgument(matcher.matches(), "Invalid author '%s'. Must be in the form of 'Name <email>'",
            author);
    return new Author(matcher.group(1).trim(), matcher.group(2).trim());
}

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From source file:co.cask.common.DirUtils.java

/**
 * Wipes out all the a directory starting from a given directory.
 * @param directory to be cleaned//w w w.j a  v  a2  s  .  com
 * @throws java.io.IOException
 */
public static void deleteDirectoryContents(File directory) throws IOException {
    Preconditions.checkArgument(directory.isDirectory(), "Not a directory: %s", directory);
    Deque<File> stack = Queues.newArrayDeque();
    stack.add(directory);

    while (!stack.isEmpty()) {
        File file = stack.peekLast();
        File[] files = file.listFiles();
        if (files == null || files.length == 0) {
            file.delete();
            stack.pollLast();
        } else {
            Collections.addAll(stack, files);
        }
    }
}

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From source file:com.google.code.jgntp.internal.util.Hex.java

public static byte[] fromHexadecimal(String s) {
    if (s == null) {
        return null;
    }//from   www .j a va 2s.c  o m
    Preconditions.checkArgument(s.length() % 2 == 0, "Invalid hex string [%s]", s);
    byte[] result = new byte[s.length() / 2];
    for (int i = 0; i < s.length(); i = i + 2) {
        int first = Character.digit(s.charAt(i), 16);
        int second = Character.digit(s.charAt(i + 1), 16);
        result[i / 2] = (byte) (0x0 + ((first & 0xff) << 4) + (second & 0xff));
    }
    return result;
}

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From source file:org.geogit.api.plumbing.merge.Conflict.java

public static Conflict valueOf(String s) {
    String[] tokens = s.split("\t");
    Preconditions.checkArgument(tokens.length == 4, "wrong conflict definitions: %s", s);
    String path = tokens[0];/*from   w w  w.j a  v  a  2 s .c  o m*/
    ObjectId ancestor = ObjectId.valueOf(tokens[1]);
    ObjectId ours = ObjectId.valueOf(tokens[2]);
    ObjectId theirs = ObjectId.valueOf(tokens[3]);
    return new Conflict(path, ancestor, ours, theirs);
}

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