Example usage for java.util Arrays copyOfRange

List of usage examples for java.util Arrays copyOfRange

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Introduction

In this page you can find the example usage for java.util Arrays copyOfRange.

Prototype

public static boolean[] copyOfRange(boolean[] original, int from, int to)

Source Link

Document

Copies the specified range of the specified array into a new array.

Usage

From source file:com.opengamma.maths.lowlevelapi.datatypes.primitive.CompressedSparseColumnFormatMatrix.java

/**
 * Construct from SparseCoordinateFormatMatrix type
 * @param m is a SparseCoordinateFormatMatrix
 *///  w  ww  . j  ava 2s  .  c om
public CompressedSparseColumnFormatMatrix(SparseCoordinateFormatMatrix m) {
    Validate.notNull(m);
    _els = m.getNumberOfElements();
    int[] colPtrTmp = new int[_els];
    int[] rowIdxTmp = new int[_els];
    double[] valuesTmp = new double[_els];
    double val;
    int ptr = 0, i;
    int localMaxEntrisInACol;
    _maxEntriesInAColumn = -1;
    for (i = 0; i < m.getNumberOfColumns(); i++) {
        colPtrTmp[i] = ptr;
        localMaxEntrisInACol = 0;
        for (int j = 0; j < m.getNumberOfRows(); j++) {
            val = m.getEntry(j, i);
            if (Double.doubleToLongBits(val) != 0L) {
                valuesTmp[ptr] = val;
                rowIdxTmp[ptr] = j;
                ptr++;
                localMaxEntrisInACol++;
            }
        }
        if (localMaxEntrisInACol > _maxEntriesInAColumn) {
            _maxEntriesInAColumn = localMaxEntrisInACol;
        }
    }
    colPtrTmp[i] = ptr; // adds in last entry to close access fields

    _values = Arrays.copyOfRange(valuesTmp, 0, ptr);
    _rowIdx = Arrays.copyOfRange(rowIdxTmp, 0, ptr);
    _colPtr = Arrays.copyOfRange(colPtrTmp, 0, i + 1); // yes, the +1 is correct!
    _rows = m.getNumberOfRows();
    _cols = m.getNumberOfColumns();
}

From source file:com.opengamma.maths.lowlevelapi.datatypes.primitive.CompressedSparseRowFormatMatrix.java

/**
 * Construct from SparseCoordinateFormatMatrix type
 * @param m is a SparseCoordinateFormatMatrix
 *//*  w w  w.jav a 2  s.c o m*/
public CompressedSparseRowFormatMatrix(SparseCoordinateFormatMatrix m) {
    Validate.notNull(m);
    _els = m.getNumberOfElements();
    int[] rowPtrTmp = new int[_els > 1 ? _els : 2];
    int localmaxEntriesInARow;
    _maxEntriesInARow = -1; // set max entries in a row negative, so that maximiser will work
    int ptr = 0;
    int i;
    for (i = 0; i < m.getNumberOfRows(); i++) {
        rowPtrTmp[i] = ptr;
        localmaxEntriesInARow = 0;
        for (int j = 0; j < m.getNumberOfColumns(); j++) {
            if (Double.doubleToLongBits(m.getEntry(i, j)) != 0L) {
                localmaxEntriesInARow++;
                ptr++;
            }
        }
        if (localmaxEntriesInARow > _maxEntriesInARow) { // is the number of entries on this row the largest?
            _maxEntriesInARow = localmaxEntriesInARow;
        }
    }
    rowPtrTmp[i] = ptr;
    _values = Arrays.copyOfRange(m.getNonZeroEntries(), 0, ptr);
    _colIdx = Arrays.copyOfRange(m.getColumnCoordinates(), 0, ptr);
    _rowPtr = Arrays.copyOfRange(rowPtrTmp, 0, i + 1); // yes, the +1 is correct!
    _rows = m.getNumberOfRows();
    _cols = m.getNumberOfColumns();
}

From source file:de.nx42.maps4cim.map.texture.osm.OsmHash.java

protected static String getQueryHashEntities(List<EntityDef> entities) {
    Hasher h = hf.newHasher();/* w w  w.  j a  va2s  .  c  om*/

    // add query
    for (EntityDef def : entities) {
        h.putInt(def.hashCode());
    }

    // get hash, cap length
    byte[] hash = h.hash().asBytes();
    if (hash.length > 4) {
        hash = Arrays.copyOfRange(hash, 0, 3);
    }

    // return hash, max 4 byte (6 chars)
    return Base64.encodeBase64URLSafeString(hash);
}

From source file:com.datatorrent.contrib.hdht.HDHTFileAccessTest.java

private void testSeqRead(long bucketKey, FileAccessFSImpl hfa, String fileName) throws IOException {
    FileAccess.FileReader in = hfa.getReader(bucketKey, fileName);
    Slice tkey = new Slice(null, 0, 0);
    Slice tvalue = new Slice(null, 0, 0);
    for (int i = 0; i < keys.length; i++) {
        assertTrue("If the cursor is currently not at the end. Next() method should return true ",
                in.next(tkey, tvalue));//from w  w w  .  ja  va2  s .  co  m
        assertArrayEquals("Key is not as expected", keys[i],
                Arrays.copyOfRange(tkey.buffer, tkey.offset, tkey.offset + tkey.length));
        assertArrayEquals("Value is not as expected", values[i].getBytes(),
                Arrays.copyOfRange(tvalue.buffer, tvalue.offset, tvalue.offset + tvalue.length));
    }
    assertFalse("Should return false because cursor is at the end", in.next(tkey, tvalue));
    in.close();
}

From source file:net.lethargiclion.informaban.InformaBanCommandExecutor.java

/**
 * Handles the /ban command.//from  w  w  w .j av  a 2  s.  co  m
 * 
 * @param sender
 *            The CommandSender executing this command.
 * @param args
 *            The command arguments.
 * @return False if a usage message should be displayed.
 */
private boolean commandBan(CommandSender sender, String[] args) {
    if (args.length == 1)
        sender.sendMessage(plugin.messages.getString("command.ban.reasonRequired"));
    if (args.length > 1) {
        Player victim = sender.getServer().getPlayer(args[0]);
        if (victim != null) {
            // Set up ban message
            String banReason = StringUtils.join(Arrays.copyOfRange(args, 1, args.length), ' ');

            // Log ban to console
            plugin.getLogger().info(MessageFormat.format(plugin.messages.getString("command.ban.consoleLog"),
                    new Object[] { sender.getName(), victim.getName() }));

            // Do the ban and record it
            Ban b = new Ban();
            b.apply(plugin.messages, victim, sender, banReason, Ban.PERMANENT);
            plugin.getDatabase().insert(b); // Record the banning event
            plugin.getDatabase().insert(b.makeActiveEvent()); // Set the actual ban
        } else
            sender.sendMessage(plugin.messages.getString("error.playerNotFound"));
        return true;
    }
    return false;
}

From source file:edu.iu.daal_subgraph.Graph.java

/**
 * @brief get adj vertices by absolute v_id
 *
 * @param v/*from www .  ja v  a2 s  .c  o m*/
 *
 * @return 
 */
int[] adjacent_vertices_abs(int v) {
    //return (&adjacency_array[degree_list[v]]);
    //this doesn't return original array.
    //Be aware of the difference
    int local_id = this.vertex_local_ids[v];
    if (local_id >= 0)
        return Arrays.copyOfRange(adjacency_array, degree_list[local_id], degree_list[local_id + 1]);
    else
        return null;
}

From source file:com.facebook.presto.accumulo.tools.Main.java

@SuppressWarnings("unchecked")
@Override//  w w  w  . ja v  a  2s.  c  om
public int run(String[] args) throws Exception {
    // If no arguments, print help
    if (args.length == 0) {
        printTools();
        return 1;
    }

    // Get the tool name from the first argument
    String toolName = args[0];
    Task t = Main.getTask(toolName);
    if (t == null) {
        System.err.println(format("Unknown tool %s", toolName));
        printTools();
        return 1;
    }

    // Add the help option and all options for the tool
    Options opts = new Options();
    opts.addOption(HELP);
    opts.addOption(CONFIG);
    for (Option o : (Collection<Option>) t.getOptions().getOptions()) {
        opts.addOption(o);
    }

    // Parse command lines
    CommandLine cmd;
    try {
        cmd = new GnuParser().parse(opts, Arrays.copyOfRange(args, 1, args.length));
    } catch (ParseException e) {
        System.err.println(e.getMessage());
        printHelp(t);
        return 1;
    }

    // Print help if the option is set
    if (cmd.hasOption(HELP.getLongOpt())) {
        printHelp(t);
        return 0;
    } else {
        AccumuloConfig config;
        if (cmd.hasOption(CONFIG.getLongOpt())) {
            config = fromFile(new File(cmd.getOptionValue(CONFIG.getLongOpt())));
        } else {
            // Validate PRESTO_HOME is set to pull accumulo properties from config path
            String prestoHome = System.getenv("PRESTO_HOME");
            if (prestoHome == null) {
                System.err.println(
                        "PRESTO_HOME is not set.  This is required to locate the etc/catalog/accumulo.properties file, or use --config option");
                System.exit(1);
            }

            // Create an AccumuloConfig from the accumulo properties file
            config = fromFile(new File(System.getenv("PRESTO_HOME"), "etc/catalog/accumulo.properties"));
        }

        // Run the tool and print help if anything bad happens
        int code = t.run(config, cmd);
        if (code != 0) {
            printHelp(t);
        }
        return code;
    }
}

From source file:org.apache.streams.data.util.JsonUtil.java

/**
 * Creates an empty array if missing/*from  w  w  w . j a v a  2  s  .  com*/
 * @param node objectnode to create the object within
 * @param field location to create the object
 * @return the Map representing the extensions property
 */
public static ObjectNode ensureObject(ObjectNode node, String field) {
    String[] path = Lists.newArrayList(Splitter.on('.').split(field)).toArray(new String[0]);
    ObjectNode current = node;
    ObjectNode result = null;
    for (int i = 0; i < path.length; i++) {
        if (node.get(field) == null)
            node.put(field, mapper.createObjectNode());
        current = (ObjectNode) node.get(field);
    }
    result = ensureObject((ObjectNode) node.get(path[path.length]),
            Joiner.on('.').join(Arrays.copyOfRange(path, 1, path.length)));
    return result;
}

From source file:ch.entwine.weblounge.kernel.command.SiteCommand.java

/**
 * Command signature that allows to do//from ww  w.ja v  a 2s  .  c  o m
 * <ul>
 * <li><code>site list</code></li>
 * <li><code>site &lt;id&gt; start</code></li>
 * <li><code>site &lt;id&gt; stop</code></li>
 * <li><code>site &lt;id&gt; restart</code></li>
 * <li><code>site &lt;id&gt; enable</code></li>
 * <li><code>site &lt;id&gt; disable</code></li>
 * <li><code>site &lt;id&gt; index</code></li>
 * <li><code>site &lt;id&gt; status</code></li>
 * <li><code>site &lt;id&gt; inspect &lt;url&gt;</code></li>
 * <li><code>site &lt;id&gt; search &lt;terms&gt;</code></li>
 * </ul>
 * 
 * @param args
 *          the list of arguments to this command
 */
public void site(String[] args) {
    if (args.length == 0) {
        list();
        return;
    } else if (args.length == 1) {
        if ("list".equals(args[0])) {
            list();
        } else {
            printUsage();
        }
    } else if (args.length > 1) {
        String id = args[0];

        // Look up the site
        Site site = getSite(id);
        if (site == null) {
            try {
                site = getSite(Integer.parseInt(id));
                if (site == null) {
                    System.out.println("Unknown site: " + id);
                    return;
                }
            } catch (NumberFormatException e) {
                System.out.println("Unknown site: " + id);
                return;
            }
        }

        // Process the command
        if ("start".equals(args[1]))
            start(site);
        else if ("stop".equals(args[1]))
            stop(site);
        else if ("restart".equals(args[1]))
            restart(site);
        else if ("index".equals(args[1]))
            index(site);
        else if ("status".equals(args[1]))
            status(site);
        else if ("inspect".equals(args[1]))
            inspect(site, Arrays.copyOfRange(args, 2, args.length));
        else if ("search".equals(args[1])) {
            search(site, Arrays.copyOfRange(args, 2, args.length));
        } else {
            System.out.println("Unknown command: " + args[1]);
            return;
        }
    } else {
        printUsage();
    }
}

From source file:hivemall.anomaly.SDAR2D.java

/**
 * @param x series of input in LIFO order
 * @param k AR window size/* www .j av a  2  s.c om*/
 * @return x_hat predicted x
 * @link https://en.wikipedia.org/wiki/Matrix_multiplication#Outer_product
 */
@Nonnull
public RealVector update(@Nonnull final ArrayRealVector[] x, final int k) {
    Preconditions.checkArgument(x.length >= 1, "x.length MUST be greater than 1: " + x.length);
    Preconditions.checkArgument(k >= 0, "k MUST be greater than or equals to 0: ", k);
    Preconditions.checkArgument(k < _C.length,
            "k MUST be less than |C| but " + "k=" + k + ", |C|=" + _C.length);

    final ArrayRealVector x_t = x[0];
    final int dims = x_t.getDimension();

    if (_initialized == false) {
        this._mu = x_t.copy();
        this._sigma = new BlockRealMatrix(dims, dims);
        assert (_sigma.isSquare());
        this._initialized = true;
        return new ArrayRealVector(dims);
    }
    Preconditions.checkArgument(k >= 1, "k MUST be greater than 0: ", k);

    // old parameters are accessible to compute the Hellinger distance
    this._muOld = _mu.copy();
    this._sigmaOld = _sigma.copy();

    // update mean vector
    // \hat{mu} := (1-r) \hat{} + r x_t
    this._mu = _mu.mapMultiply(1.d - _r).add(x_t.mapMultiply(_r));

    // compute residuals (x - \hat{})
    final RealVector[] xResidual = new RealVector[k + 1];
    for (int j = 0; j <= k; j++) {
        xResidual[j] = x[j].subtract(_mu);
    }

    // update covariance matrices
    // C_j := (1-r) C_j + r (x_t - \hat{}) (x_{t-j} - \hat{})'
    final RealMatrix[] C = this._C;
    final RealVector rxResidual0 = xResidual[0].mapMultiply(_r); // r (x_t - \hat{})
    for (int j = 0; j <= k; j++) {
        RealMatrix Cj = C[j];
        if (Cj == null) {
            C[j] = rxResidual0.outerProduct(x[j].subtract(_mu));
        } else {
            C[j] = Cj.scalarMultiply(1.d - _r).add(rxResidual0.outerProduct(x[j].subtract(_mu)));
        }
    }

    // solve A in the following Yule-Walker equation
    // C_j = _{i=1}^{k} A_i C_{j-i} where j = 1..k, C_{-i} = C_i'
    /*
     * /C_1\     /A_1\  /C_0     |C_1'    |C_2'    | .  .  .   |C_{k-1}' \
     * |---|     |---|  |--------+--------+--------+           +---------|
     * |C_2|     |A_2|  |C_1     |C_0     |C_1'    |               .     |
     * |---|     |---|  |--------+--------+--------+               .     |
     * |C_3|  =  |A_3|  |C_2     |C_1     |C_0     |               .     |
     * | . |     | . |  |--------+--------+--------+                     |
     * | . |     | . |  |   .                            .               |
     * | . |     | . |  |   .                            .               |
     * |---|     |---|  |--------+                              +--------|
     * \C_k/     \A_k/  \C_{k-1} | .  .  .                      |C_0     /
     */
    RealMatrix[][] rhs = MatrixUtils.toeplitz(C, k);
    RealMatrix[] lhs = Arrays.copyOfRange(C, 1, k + 1);
    RealMatrix R = MatrixUtils.combinedMatrices(rhs, dims);
    RealMatrix L = MatrixUtils.combinedMatrices(lhs);
    RealMatrix A = MatrixUtils.solve(L, R, false);

    // estimate x
    // \hat{x} = \hat{} + _{i=1}^k A_i (x_{t-i} - \hat{})
    RealVector x_hat = _mu.copy();
    for (int i = 0; i < k; i++) {
        int offset = i * dims;
        RealMatrix Ai = A.getSubMatrix(offset, offset + dims - 1, 0, dims - 1);
        x_hat = x_hat.add(Ai.operate(xResidual[i + 1]));
    }

    // update model covariance
    //  := (1-r)  + r (x - \hat{x}) (x - \hat{x})'
    RealVector xEstimateResidual = x_t.subtract(x_hat);
    this._sigma = _sigma.scalarMultiply(1.d - _r)
            .add(xEstimateResidual.mapMultiply(_r).outerProduct(xEstimateResidual));

    return x_hat;
}