Examples of Tuple2

com.foundationdb.tuple.Tuple2
Represents a set of elements that make up a sortable, typed key. This object is comparable with other {@code Tuple}s and will sort in Java in the same order in which they would sort in FoundationDB. {@code Tuple}s sort first by the first element, then by the second, etc. This makes the tuple layer ideal for building a variety of higher-level data models.

Types
A {@code Tuple} cancontain byte arrays ( {@code byte[]}), {@link String}s, {@link Number}s, and {@code null}. Note that for numbers outside this range the way that Java truncates integral values may yield unexpected results.

{@code null} values
The FoundationDB tuple specification has a special type-code for {@code None}; {@code nil}; or, as Java would understand it, {@code null}. The behavior of the layer in the presence of {@code null} varies by type with the intentionof matching expected behavior in Java. {@code byte[]} and {@link String}s can be {@code null}, where integral numbers (i.e. {@code long}s) cannot. This means that the typed getters ( {@link #getBytes(int) getBytes()} and {@link #getString(int) getString()}) will return {@code null} if the entry at that location was {@code null} and the typed adds( {@link #add(byte[])} and {@link #add(String)}) will accept {@code null}. The {@link #getLong(int) typed get for integers}, however, will throw a {@code NullPointerException} ifthe entry in the {@code Tuple} was {@code null} at that position.

This class is not thread safe.
de.iritgo.simplelife.data.Tuple2
eu.stratosphere.api.java.tuple.Tuple2
A tuple with 2 fields. Tuples are strongly typed; each field may be of a separate type. The fields of the tuple can be accessed directly as public fields (f0, f1, ...) or via their position through the {@link #getField(int)} method. The tuple field positions start at zero.
Tuples are mutable types, meaning that their fields can be re-assigned. This allows functions that work with Tuples to reuse objects in order to reduce pressure on the garbage collector. @see Tuple @param < T0> The type of field 0 @param < T1> The type of field 1
org.apache.flink.api.java.tuple.Tuple2
A tuple with 2 fields. Tuples are strongly typed; each field may be of a separate type. The fields of the tuple can be accessed directly as public fields (f0, f1, ...) or via their position through the {@link #getField(int)} method. The tuple field positions start at zero.
Tuples are mutable types, meaning that their fields can be re-assigned. This allows functions that work with Tuples to reuse objects in order to reduce pressure on the garbage collector. @see Tuple @param < T0> The type of field 0 @param < T1> The type of field 1
scala.Tuple2
sg.edu.nus.iss.se07.common.Tuple2

Examples of com.foundationdb.tuple.Tuple2

        Map<List<String>,byte[]> result = new HashMap<>();
        for (KeyValue kv : kvs) {
            byte[] tupleBytes = new byte[kv.getKey().length - confKey.length];
            System.arraycopy(kv.getKey(), confKey.length, tupleBytes, 0, tupleBytes.length);
            // TODO: It's a shame that there isn't a fromBytes with index offets.
            Tuple2 tuple = Tuple2.fromBytes(tupleBytes);
            List<String> list = new ArrayList<>(tuple.size());
            for (int i = 0; i < tuple.size(); i++) {
                if (BINARY_STRINGS) {
                    try {
                        list.add(new String(tuple.getBytes(i), "UTF-8"));
                    }
                    catch (UnsupportedEncodingException ex) {
                        throw new AkibanInternalException("Error decoding binary string", ex);
                    }
                }
                else {
                    list.add(tuple.getString(i));
                }
            }
            result.put(list, kv.getValue());
        }
        // Initiate a watch (from this same transaction) for changes to the key

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Examples of com.foundationdb.tuple.Tuple2

                        .pack();
        }


        @Override
        protected List<FDBMetric.Value<Boolean>> decodeValues(byte[] bytes) {
            Tuple2 tuple = Tuple2.fromBytes(bytes);
            int nvalues = tuple.size();
            List<FDBMetric.Value<Boolean>> result = new ArrayList<>(nvalues);
            long tvalue = 0;
            for (int i = 0; i < nvalues; i++) {
                tvalue += tuple.getLong(i);
                long time = tvalue >>> 1;
                boolean value = ((tvalue & 1) != 0);
                result.add(new FDBMetric.Value<Boolean>(time, value));
            }
            return result;

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Examples of com.foundationdb.tuple.Tuple2

                         .pack();
        }


        @Override
        protected List<FDBMetric.Value<Long>> decodeValues(byte[] bytes) {
            Tuple2 tuple = Tuple2.fromBytes(bytes);
            int nvalues = tuple.size() / 2;
            List<FDBMetric.Value<Long>> result = new ArrayList<>(nvalues);
            long time = 0, value = 0;
            for (int i = 0; i < nvalues; i++) {
                time += tuple.getLong(i * 2);
                value += tuple.getLong(i * 2 + 1);
                result.add(new FDBMetric.Value<Long>(time, value));
            }
            return result;
        }

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Examples of com.foundationdb.tuple.Tuple2

     * reading the 'a's, pending holds 'b'. 
     */
    @Override
    public Void next() {
        Map<String,Object> value = new HashMap<>();
        Tuple2 lastKey = null;
        while (true) {
            KeyValue kv;
            if (pending != null) {
                kv = pending;
                pending = null;
            } else {
                try {
                    if (underlying.hasNext()) {
                        kv = underlying.next();
                    } else {
                        break;
                    }
                } catch (RuntimeException e) {
                    throw FDBAdapter.wrapFDBException(storeData.session, e);
                }
            }
            
            Tuple2 key = Tuple2.fromBytes(kv.getKey());
            String name = key.getString(key.size() - 1);
            key = key.popBack();
            if (lastKey == null) {
                lastKey = key;
            }
            else if (!key.equals(lastKey)) {
                pending = kv;
                break;
            }
            value.put(name, Tuple2.fromBytes(kv.getValue()).get(0));
        }

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Examples of com.foundationdb.tuple.Tuple2

    @Override
    public void packRowData(FDBStore store, Session session,
                            FDBStoreData storeData, RowData rowData) {
        if (usage == TupleUsage.KEY_AND_ROW) {
            RowDef rowDef = object.getAIS().getTable(rowData.getRowDefId()).rowDef();
            Tuple2 t = TupleRowDataConverter.tupleFromRowData(rowDef, rowData);
            storeData.rawValue = t.pack();
        }
        else {
            super.packRowData(store, session, storeData, rowData);
        }
    }

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Examples of com.foundationdb.tuple.Tuple2


    @Override
    public void expandRowData(FDBStore store, Session session,
                              FDBStoreData storeData, RowData rowData) {
        if (usage == TupleUsage.KEY_AND_ROW) {
            Tuple2 t = Tuple2.fromBytes(storeData.rawValue);
            RowDef rowDef = rowDefFromOrdinals((Group) object, storeData);
            TupleRowDataConverter.tupleToRowData(t, rowDef, rowData);
        }
        else {
            super.expandRowData(store, session, storeData, rowData);

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Examples of com.foundationdb.tuple.Tuple2

        } else {
            // TODO: Allow FDBStorageDescription to intervene?
            TransactionState txn = txnService.getTransaction(session);
            byte[] byteValue = txn.getValue(prefixBytes(sequence));
            if(byteValue != null) {
                Tuple2 tuple = Tuple2.fromBytes(byteValue);
                rawValue = tuple.getLong(0);
            }
        }
        return sequence.realValueForRawNumber(rawValue);
    }

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Examples of com.foundationdb.tuple.Tuple2

        Transaction tr = txnService.getTransaction(session).getTransaction();
        byte[] prefixBytes = prefixBytes(s);
        byte[] byteValue = tr.get(prefixBytes).get();
        final long rawValue;
        if(byteValue != null) {
            Tuple2 tuple = Tuple2.fromBytes(byteValue);
            rawValue = tuple.getLong(0);
        } else {
            rawValue = 1;
        }
        tr.set(prefixBytes, Tuple2.from(rawValue + sequenceCacheSize).pack());

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Examples of com.foundationdb.tuple.Tuple2

    }


    public static void unpackTuple(FDBStorageDescription storageDescription, Key key, byte[] tupleBytes) {
        byte[] treeBytes = prefixBytes(storageDescription);
        // TODO: Use fromBytes(byte[],int,int) when available.
        Tuple2 tuple = Tuple2.fromBytes(Arrays.copyOfRange(tupleBytes, treeBytes.length, tupleBytes.length));
        storageDescription.getTupleKey(tuple, key);
    }

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Examples of com.foundationdb.tuple.Tuple2

    }


    @Test
    public void doCompare() {
        try {
            Tuple2 actual = Tuple2.fromList(FDBHolderImpl.parseDirString(dirString));
            if(expected.size() != actual.size()) {
                fail(String.format("Tuple size mismatch: [%s] vs [%s]", expected.getItems(), actual.getItems()));
            }
            for(int i = 0; i < expected.size(); ++i) {
                Object e = expected.get(i);
                Object a = actual.get(i);
                assertEquals(String.format("tuple(%d)", i), e, a);
            }
        } catch(IllegalArgumentException e) {
            if(dirString != null) {
                throw e;

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Examples of Tuple2

Types

{@code null} values

Examples of com.foundationdb.tuple.Tuple2

Examples of com.foundationdb.tuple.Tuple2

Examples of com.foundationdb.tuple.Tuple2

Examples of com.foundationdb.tuple.Tuple2

Examples of com.foundationdb.tuple.Tuple2

Examples of com.foundationdb.tuple.Tuple2

Examples of com.foundationdb.tuple.Tuple2

Examples of com.foundationdb.tuple.Tuple2

Examples of com.foundationdb.tuple.Tuple2

Examples of com.foundationdb.tuple.Tuple2