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:com.google.devtools.build.android.resources.IntArrayFieldInitializer.java

public static FieldInitializer of(String name, String value) {
    Preconditions.checkArgument(value.startsWith("{ "), "Expected list starting with { ");
    Preconditions.checkArgument(value.endsWith(" }"), "Expected list ending with } ");
    // Check for an empty list, which is "{ }".
    if (value.length() < 4) {
        return new IntArrayFieldInitializer(name, ImmutableList.<Integer>of());
    }//from   w  w w .ja  va2 s  . c om
    ImmutableList.Builder<Integer> intValues = ImmutableList.builder();
    String trimmedValue = value.substring(2, value.length() - 2);
    Iterable<String> valueStrings = Splitter.on(',').trimResults().split(trimmedValue);
    for (String valueString : valueStrings) {
        intValues.add(Integer.decode(valueString));
    }
    return new IntArrayFieldInitializer(name, intValues.build());
}

From source file:com.qq.tars.service.SetTriple.java

public static SetTriple parseSet(String set) {
    Preconditions.checkArgument(null != set, "set is null");

    String[] tokens = StringUtils.split(set, '.');
    if (tokens.length != 3 || StringUtils.isAnyBlank(tokens)) {
        throw new IllegalArgumentException(String.format("set=%s", set));
    }/*  w ww  . jav  a2  s . c  o  m*/
    return SetTriple.formatSet(tokens[0], tokens[1], tokens[2]);
}

From source file:com.cloudera.flume.handlers.text.output.RawOutputFormat.java

public static OutputFormatBuilder builder() {
    return new OutputFormatBuilder() {

        @Override//from   w  w  w.  j  av  a 2  s.  c  om
        public OutputFormat build(String... args) {
            Preconditions.checkArgument(args.length == 0, "usage: raw");

            OutputFormat format = new RawOutputFormat();
            format.setBuilder(this);

            return format;
        }

        @Override
        public String getName() {
            return NAME;
        }

    };
}

From source file:com.jivesoftware.os.amza.api.wal.WALKey.java

public static byte[] compose(byte[] prefix, byte[] key) {
    Preconditions.checkNotNull(key, "Key cannot be null");

    int prefixLength = prefix != null ? prefix.length : 0;
    Preconditions.checkArgument(prefixLength <= Short.MAX_VALUE, "Max prefix length is 32767");

    byte[] pk = new byte[2 + prefixLength + key.length];
    UIO.shortBytes((short) prefixLength, pk, 0);
    if (prefix != null) {
        System.arraycopy(prefix, 0, pk, 2, prefixLength);
    }/*from  w  ww .ja v a 2  s . c o  m*/
    System.arraycopy(key, 0, pk, 2 + prefixLength, key.length);
    return pk;
}

From source file:org.opendaylight.protocol.bgp.util.HexDumpBGPFileParser.java

public static List<byte[]> parseMessages(final File file) throws IOException {
    Preconditions.checkArgument(file != null, "Filename cannot be null");
    return parseMessages(new FileInputStream(file));
}

From source file:org.zalando.crypto.Decrypters.java

public static List<Decrypter> findByPrefix(List<Decrypter> decrypters, String prefix) {
    Preconditions.checkNotNull(decrypters, "'Decrypter's-list should not be null");
    Preconditions.checkArgument(!Strings.isNullOrEmpty(prefix), "'prefix' should never be null or empty.");
    return Lists.newArrayList(Iterables.filter(decrypters,
            Predicates.and(new PrefixedDecrypterPredicate(), new PrefixPredicate(prefix))));
}

From source file:io.druid.java.util.common.parsers.TimestampParser.java

public static Function<String, DateTime> createTimestampParser(final String format) {
    if (format.equalsIgnoreCase("auto")) {
        // Could be iso or millis
        return new Function<String, DateTime>() {
            @Override/*  w ww  .  j a  v a  2s. co  m*/
            public DateTime apply(String input) {
                Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");

                for (int i = 0; i < input.length(); i++) {
                    if (input.charAt(i) < '0' || input.charAt(i) > '9') {
                        return new DateTime(ParserUtils.stripQuotes(input));
                    }
                }

                return new DateTime(Long.parseLong(input));
            }
        };
    } else if (format.equalsIgnoreCase("iso")) {
        return new Function<String, DateTime>() {
            @Override
            public DateTime apply(String input) {
                Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                return new DateTime(ParserUtils.stripQuotes(input));
            }
        };
    } else if (format.equalsIgnoreCase("posix") || format.equalsIgnoreCase("millis")
            || format.equalsIgnoreCase("nano")) {
        final Function<Number, DateTime> numericFun = createNumericTimestampParser(format);
        return new Function<String, DateTime>() {
            @Override
            public DateTime apply(String input) {
                Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                return numericFun.apply(Long.parseLong(ParserUtils.stripQuotes(input)));
            }
        };
    } else if (format.equalsIgnoreCase("ruby")) {
        // Numeric parser ignores millis for ruby.
        final Function<Number, DateTime> numericFun = createNumericTimestampParser(format);
        return new Function<String, DateTime>() {
            @Override
            public DateTime apply(String input) {
                Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                return numericFun.apply(Double.parseDouble(ParserUtils.stripQuotes(input)));
            }
        };
    } else {
        try {
            final DateTimeFormatter formatter = DateTimeFormat.forPattern(format);
            return new Function<String, DateTime>() {
                @Override
                public DateTime apply(String input) {
                    Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                    return formatter.parseDateTime(ParserUtils.stripQuotes(input));
                }
            };
        } catch (Exception e) {
            throw new IAE(e, "Unable to parse timestamps with format [%s]", format);
        }
    }
}

From source file:org.zanata.client.commands.DocNameWithExt.java

public static DocNameWithExt from(String filename) {
    String extension = FilenameUtils.getExtension(filename);
    Preconditions.checkArgument(!Strings.isNullOrEmpty(extension), "expected a full filename (with extension)");
    return new DocNameWithExt(filename);
}

From source file:org.haiku.haikudepotserver.dataobjects.PkgCategory.java

/**
 * <p>Given the codes supplied, this method will return all of the categories for
 * those codes.</p>//from   w  w w .  j  av a2s .  co  m
 */

public static List<PkgCategory> getByCodes(ObjectContext context, final Collection<String> codes) {
    Preconditions.checkArgument(null != context, "the context must be provided");
    Preconditions.checkArgument(null != codes, "the codes must be provided");
    return getAll(context).stream().filter(pc -> codes.contains(pc.getCode())).collect(Collectors.toList());
}

From source file:org.excalibur.service.manager.NodeManagerFactory.java

public static NodeManager getManagerReference() {
    try {//from  w w w.  ja va 2 s  . com
        LATCH.await();
        NodeManager manager = manager_.get();
        Preconditions.checkArgument(manager != null, "call setManager(manager)");

        return manager_.get();

    } catch (InterruptedException e) {
        Thread.interrupted();
        AnyThrow.throwUncheked(e);
    }

    return null;
}