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.facebook.buck.rules.CellPathResolverSerializer.java

public static ImmutableMap<String, Object> serialize(CellPathResolver resolver) {
    Preconditions.checkArgument(resolver instanceof DefaultCellPathResolver,
            "Unsupported CellPathResolver class: %s", resolver.getClass());

    DefaultCellPathResolver defaultResolver = (DefaultCellPathResolver) resolver;

    ImmutableMap.Builder<String, Object> builder = ImmutableMap.builder();
    builder.put(TYPE, TYPE_DEFAULT);//w w  w  .j a v  a  2 s  . c  om
    builder.put(ROOT_PATH, defaultResolver.getRoot().toString());

    ImmutableMap.Builder<String, String> cellPathAsStrings = ImmutableMap.builder();
    for (Map.Entry<String, Path> entry : defaultResolver.getCellPaths().entrySet()) {
        cellPathAsStrings.put(entry.getKey(), entry.getValue().toString());
    }
    builder.put(CELL_PATHS, cellPathAsStrings.build());
    return builder.build();
}

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From source file:io.airlift.stats.cardinality.Utils.java

public static int indexBitLength(int numberOfBuckets) {
    Preconditions.checkArgument(isPowerOf2(numberOfBuckets), "numberOfBuckets must be a power of 2, actual: %s",
            numberOfBuckets);/*w ww. j a v a  2  s.c  o  m*/
    return (int) (Math.log(numberOfBuckets) / Math.log(2));
}

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From source file:org.onos.yangtools.yang.data.impl.codec.BooleanStringCodec.java

private static void validate(final String string) {
    Preconditions.checkArgument("true".equalsIgnoreCase(string) || "false".equalsIgnoreCase(string),
            "Invalid value '%s' for boolean type. Allowed values are true and false", string);
}

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From source file:com.goodow.wind.server.model.DeltaSerializer.java

public static JsonObject dataToClientJson(Delta<String> data, long resultingRevision) {
    Preconditions.checkArgument(resultingRevision <= MAX_DOUBLE_INTEGER, "Resulting revision %s is too large",
            resultingRevision);//from  w  ww. j  a  va2 s  .  c o m

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

    JsonObject json = new JsonObject();
    try {
        Preconditions.checkArgument(resultingRevision >= 0, "invalid rev %s", resultingRevision);
        json.addProperty(Constants.Params.VERSION, resultingRevision);
        long sanityCheck = json.get(Constants.Params.VERSION).getAsLong();
        if (sanityCheck != resultingRevision) {
            throw new AssertionError("resultingRevision " + resultingRevision
                    + " not losslessly represented in JSON, got back " + sanityCheck);
        }
        json.addProperty(Constants.Params.SESSION_ID, data.getClientId().getId());
        json.add(Constants.Params.OPERATION, payloadJson);
        return json;
    } catch (JsonParseException e) {
        throw new Error(e);
    }
}

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From source file:net.galaxy.weather.MeasurementParser.java

public static MeasurementDto parse(int src, String str) throws IllegalArgumentException {
    Preconditions.checkNotNull(str, "String is null");
    Preconditions.checkArgument(str.length() > 6, "Invalid string: [%s]", str);

    logger.debug("parsing: [{}]", str);
    try {//  ww  w. ja v  a 2 s.  c  om
        String payload = str.substring(0, str.lastIndexOf('^'));
        logger.trace("  payload: `{}`", payload);
        String receivedCrcStr = str.substring(str.lastIndexOf('^') + 1, str.length());
        logger.trace("  CRC16: `{}`", receivedCrcStr);

        int calculatedCrc;
        try {
            calculatedCrc = Digest.crc16(payload.getBytes("ASCII")) & 0xFFFF;
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }

        int receivedCrc = Integer.valueOf(receivedCrcStr, 16);
        if (calculatedCrc != receivedCrc) {
            throw new IllegalArgumentException("Checksum mismatch");
        }

        String[] parts = payload.split("\\|");
        if (parts.length != 5) {
            throw new IllegalArgumentException("Invalid format -- missing parts");
        }

        long timestamp = Long.parseLong(parts[0]) * 1000 + DT_ADD;

        String[] thParts = parts[1].split(":");
        double temp = 0;
        double humid = 0;
        if (thParts.length == 2) {
            temp = Integer.valueOf(thParts[0], 10) / 10.0;
            humid = Integer.valueOf(thParts[1], 10) / 10.0;
            // temperature sensor error
        }

        MathContext mc = new MathContext(2);
        return new MeasurementDto(src, timestamp, temp, humid, Integer.valueOf(parts[4], 10) / 100.0,
                MeasurementDto.BatteryStatus.values()[Integer.valueOf(parts[2], 10)],
                Integer.valueOf(parts[3], 10) / 100.0);
    } catch (Exception ex) {
        throw new IllegalArgumentException(
                String.format("Error parsing string [%s]: %s", str, ex.getMessage()));
    }
}

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From source file:com.goodow.realtime.server.model.DeltaSerializer.java

public static JsonElement dataToClientJson(Delta<String> data, long resultingRevision) {
    Preconditions.checkArgument(resultingRevision <= MAX_DOUBLE_INTEGER, "Resulting revision %s is too large",
            resultingRevision);//from  w  ww  .  ja v a  2s . c o  m

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

    JsonArray json = new JsonArray();
    try {
        Preconditions.checkArgument(resultingRevision >= 0, "invalid rev %s", resultingRevision);
        json.add(new JsonPrimitive(resultingRevision));
        long sanityCheck = json.get(0).getAsLong();
        if (sanityCheck != resultingRevision) {
            throw new AssertionError("resultingRevision " + resultingRevision
                    + " not losslessly represented in JSON, got back " + sanityCheck);
        }
        json.add(new JsonPrimitive(data.getSession().userId));
        json.add(new JsonPrimitive(data.getSession().sessionId));
        json.add(payloadJson);
        return json;
    } catch (JsonParseException e) {
        throw new Error(e);
    }
}

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From source file:com.facebook.buck.hashing.PathHashing.java

public static ImmutableSet<Path> hashPath(Hasher hasher, FileHashLoader fileHashLoader,
        ProjectFilesystem projectFilesystem, Path root) throws IOException {
    Preconditions.checkArgument(!root.equals(EMPTY_PATH), "Path to hash (%s) must not be empty", root);
    ImmutableSet.Builder<Path> children = ImmutableSet.builder();
    for (Path path : ImmutableSortedSet.copyOf(projectFilesystem.getFilesUnderPath(root))) {
        StringHashing.hashStringAndLength(hasher, MorePaths.pathWithUnixSeparators(path));
        if (!root.equals(path)) {
            children.add(root.relativize(path));
        }/*w w w .  ja v a 2  s  .c o m*/
        hasher.putBytes(fileHashLoader.get(projectFilesystem.resolve(path)).asBytes());
    }
    return children.build();
}

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From source file:com.facebook.buck.util.hashing.PathHashing.java

public static ImmutableSet<Path> hashPath(Hasher hasher, ProjectFileHashLoader fileHashLoader,
        ProjectFilesystem projectFilesystem, Path root) throws IOException {
    Preconditions.checkArgument(!root.equals(EMPTY_PATH), "Path to hash (%s) must not be empty", root);
    ImmutableSet.Builder<Path> children = ImmutableSet.builder();
    for (Path path : ImmutableSortedSet.copyOf(projectFilesystem.getFilesUnderPath(root))) {
        StringHashing.hashStringAndLength(hasher, MorePaths.pathWithUnixSeparators(path));
        if (!root.equals(path)) {
            children.add(root.relativize(path));
        }//from   w  w  w .j  ava2 s  . com
        hasher.putBytes(fileHashLoader.get(path).asBytes());
    }
    return children.build();
}

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From source file:io.crate.analyze.BlobTableAnalyzer.java

static TableIdent tableToIdent(Table table) {
    List<String> tableNameParts = table.getName().getParts();
    Preconditions.checkArgument(tableNameParts.size() < 3, "Invalid tableName \"%s\"", table.getName());

    if (tableNameParts.size() == 2) {
        Preconditions.checkArgument(tableNameParts.get(0).equalsIgnoreCase(BlobSchemaInfo.NAME),
                "The Schema \"%s\" isn't valid in a [CREATE | ALTER] BLOB TABLE clause", tableNameParts.get(0));

        return new TableIdent(tableNameParts.get(0), tableNameParts.get(1));
    }//from  w w w . ja v  a  2 s  . c  o m
    assert tableNameParts.size() == 1;
    return new TableIdent(BlobSchemaInfo.NAME, tableNameParts.get(0));
}

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From source file:org.janusgraph.graphdb.database.idhandling.VariableLong.java

public static byte unsignedByte(int value) {
    Preconditions.checkArgument(value >= 0 && value < 256, "Value overflow: %s", value);
    return (byte) (value & 0xFF);
}

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