+
−/*
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− * This Source Code Form is subject to the terms of the Mozilla Public
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− * License, v. 2.0.  If a copy of the MPL was not distributed with this
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− * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
− *
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− * Copyright 2016 MonetDB B.V.
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− */
+
−
+
−package nl.cwi.monetdb.embedded.resultset;
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−
+
−import nl.cwi.monetdb.embedded.env.MonetDBEmbeddedException;
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−
+
−/**
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− * A MonetDB column converted to an array of Java byte values.
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− *
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− * @author <a href="mailto:pedro.ferreira@monetdbsolutions.com">Pedro Ferreira</a>
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− */
+
−public final class QueryResultSetByteColumn extends AbstractQueryResultSetColumn<byte[]> {
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−
+
−    /**
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−     * Gets MonetDB's byte null constant
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−     *
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−     * @return MonetDB's byte null constant
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−     */
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−    public static native byte GetByteNullConstant();
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−
+
−    /**
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−     * Checks if the short value is null or not.
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−     *
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−     * @param value The value to evaluate
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−     * @return If the short value is null or not.
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−     */
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−    public static native boolean CheckByteIsNull(byte value);
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−
+
−    /**
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−     * Array with the retrieved values.
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−     */
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−    private final byte[] values;
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−
+
−    protected QueryResultSetByteColumn(String columnType, long tablePointer, int resultSetIndex, String columnName,
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−                                       int columnDigits, int columnScale, int numberOfRows) {
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−        super(columnType, tablePointer, resultSetIndex, columnName, columnDigits, columnScale, numberOfRows);
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−        if(!this.getMapping().getJavaClass().equals(Byte.class)) {
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−            throw new ClassCastException("The parameter must be of byte type!!");
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−        }
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−        this.values = new byte[numberOfRows];
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−    }
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−
+
−    @Override
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−    protected void fetchMoreData(int startIndex, int endIndex) throws MonetDBEmbeddedException {
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−        this.fetchValuesInternal(this.tablePointer, this.resultSetIndex, startIndex, endIndex, this.values, this.nullValues);
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−    }
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−
+
−    @Override
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−    protected byte[] storeNewDataAndGetResult(int startIndex, int numberOfRowsToRetrieve) {
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−        byte[] result = new byte[numberOfRowsToRetrieve];
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−        System.arraycopy(this.values, startIndex, result, 0, numberOfRowsToRetrieve);
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−        return result;
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−    }
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−
+
−    @Override
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−    protected Byte[] mapValuesToObjectArrayImplementation(int startIndex, int numberOfRowsToRetrieve) {
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−        Byte[] res = new Byte[numberOfRowsToRetrieve];
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−        int endIndex = startIndex + numberOfRowsToRetrieve;
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−        for(int i = startIndex, j = 0 ; i < endIndex ; i++, j++) {
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−            res[j] = (this.nullValues[i]) ? null : this.values[i];
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−        }
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−        return res;
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−    }
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−
+
−    /**
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−     * Internal implementation to fetch values from the column.
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−     */
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−    private native void fetchValuesInternal(long tablePointer, int resultSetIndex, int startIndex, int endIndex,
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−                                            byte[] values, boolean[] nullValues) throws MonetDBEmbeddedException;
+
−}