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) 

Source Link

Document

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

Usage

From source file:org.thinkfree.axihome.NFC.record.TextRecord.java

public static TextRecord parse(NdefRecord record) {
    Preconditions.checkArgument(record.getTnf() == NdefRecord.TNF_WELL_KNOWN);
    Preconditions.checkArgument(Arrays.equals(record.getType(), NdefRecord.RTD_TEXT));
    try {/*from   w w w  .j  a v  a 2 s. c  om*/
        byte[] payload = record.getPayload();
        /*
         * payload[0] contains the "Status Byte Encodings" field, per the
         * NFC Forum "Text Record Type Definition" section 3.2.1.
         *
         * bit7 is the Text Encoding Field.
         *
         * if (Bit_7 == 0): The text is encoded in UTF-8 if (Bit_7 == 1):
         * The text is encoded in UTF16
         *
         * Bit_6 is reserved for future use and must be set to zero.
         *
         * Bits 5 to 0 are the length of the IANA language code.
         */
        String textEncoding = ((payload[0] & 0200) == 0) ? "UTF-8" : "UTF-16";
        int languageCodeLength = payload[0] & 0077;
        String languageCode = new String(payload, 1, languageCodeLength, "US-ASCII");
        String text = new String(payload, languageCodeLength + 1, payload.length - languageCodeLength - 1,
                textEncoding);
        return new TextRecord(languageCode, text);
    } catch (UnsupportedEncodingException e) {
        // should never happen unless we get a malformed tag.
        throw new IllegalArgumentException(e);
    }
}

---

From source file:org.b1.pack.standard.common.Numbers.java

public static byte[] serializeLong(Long value, int size) {
    try {/*w  ww .j a  v a  2s .co m*/
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        writeLong(value, stream);
        int minSize = stream.size();
        if (minSize == size) {
            return stream.toByteArray();
        }
        Preconditions.checkArgument(minSize < size);
        while (stream.size() < size - 1) {
            stream.write(0x80);
        }
        stream.write(0);
        byte[] result = stream.toByteArray();
        result[minSize - 1] |= 0x80;
        return result;
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

---

From source file:com.google.gplus.serializer.util.GPlusEventClassifier.java

public static Class detectClass(String json) {
    Preconditions.checkNotNull(json);// w w w. j  ava2  s  . c  om
    Preconditions.checkArgument(StringUtils.isNotEmpty(json));

    ObjectNode objectNode;
    try {
        objectNode = (ObjectNode) mapper.readTree(json);
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }

    if (objectNode.findValue("kind") != null && objectNode.get("kind").toString().equals(ACTIVITY_IDENTIFIER)) {
        return Activity.class;
    } else if (objectNode.findValue("kind") != null
            && objectNode.get("kind").toString().equals(PERSON_IDENTIFIER)) {
        return Person.class;
    } else {
        return ObjectNode.class;
    }
}

---

From source file:org.cinchapi.concourse.util.TLists.java

/**
 * Modify each list to retain only the elements that are contained in all of
 * the lists./*from  w  ww.  j  a v a2 s .  c  om*/
 * 
 * @param lists
 */
@SafeVarargs
public static void retainIntersection(List<?>... lists) {
    Preconditions.checkArgument(lists.length > 0);
    List<?> intersection = lists[0];
    for (int i = 1; i < lists.length; i++) {
        intersection.retainAll(lists[i]);
    }
    for (int i = 1; i < lists.length; i++) {
        lists[i].retainAll(intersection);
    }
}

---

From source file:com.anhth12.lambda.ml.param.DiscreteAround.java

public DiscreteAround(int around, int step) {
    Preconditions.checkArgument(step > 0);
    this.around = around;
    this.step = step;
}

---

From source file:com.cloudera.oryx.kmeans.common.ClusterValidityStatistics.java

public static ClusterValidityStatistics create(Iterable<WeightedRealVector> points, Centers test, Centers train,
        int replicaId) {
    Preconditions.checkArgument(test.size() == train.size());
    int k = test.size();
    double n = 0.0;
    double testCost = 0.0;
    double trainCost = 0.0;
    RealMatrix contingencyMatrix = new Array2DRowRealMatrix(k, k);
    double[] rowSums = new double[k];
    double[] colSums = new double[k];
    for (WeightedRealVector wv : points) {
        Distance d1 = test.getDistance(wv.thing());
        Distance d2 = train.getDistance(wv.thing());
        contingencyMatrix.addToEntry(d1.getClosestCenterId(), d2.getClosestCenterId(), wv.weight());
        rowSums[d1.getClosestCenterId()] += wv.weight();
        colSums[d2.getClosestCenterId()] += wv.weight();
        testCost += d1.getSquaredDistance() * wv.weight();
        trainCost += d2.getSquaredDistance() * wv.weight();
        n += wv.weight();//from  w  ww  .  j a  v a 2 s  . c  om
    }

    return new ClusterValidityStatistics(k, replicaId, testCost, trainCost,
            normVarInformation(contingencyMatrix, rowSums, colSums, n),
            normVanDongen(contingencyMatrix, rowSums, colSums, n));
}

---

From source file:com.anhth12.lambda.ml.param.ContinuousAround.java

ContinuousAround(double around, double step) {
    Preconditions.checkArgument(step > 0.0);
    this.around = around;
    this.step = step;
}

---

From source file:org.apache.streams.facebook.provider.FacebookEventClassifier.java

/**
 * detectClass from json string.//from   w  w  w  .  j  a v  a  2  s  . c  o  m
 * @param json json string
 * @return detected Class
 */
public static Class detectClass(String json) {

    Objects.requireNonNull(json);
    Preconditions.checkArgument(StringUtils.isNotEmpty(json));

    ObjectNode objectNode;
    try {
        objectNode = (ObjectNode) StreamsJacksonMapper.getInstance().readTree(json);
    } catch (IOException ex) {
        LOGGER.error("Exception while trying to detect class: {}", ex.getMessage());
        return null;
    }

    if (objectNode.findValue("about") != null) {
        return Page.class;
    } else if (objectNode.findValue("statusType") != null) {
        return Post.class;
    } else {
        return Post.class;
    }
}

---

From source file:eu.interedition.web.io.RangeConverter.java

private static long toLong(String str) {
    final long value = Long.valueOf(str);
    Preconditions.checkArgument(value >= 0);
    return value;
}

---

From source file:com.yahoo.yqlplus.engine.internal.plan.types.base.NullTestingComparisonAdapter.java

public NullTestingComparisonAdapter(TypeWidget nullableTarget, TypeWidget target) {
    Preconditions.checkArgument(nullableTarget.isNullable());
    Preconditions.checkArgument(!target.isNullable());
    this.nullableTarget = nullableTarget;
    this.target = target.getComparisionAdapter();
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• »