+
−/*
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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 boolean 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 QueryResultSetBooleanColumn extends AbstractQueryResultSetColumn<boolean[]> {
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−
+
−    /**
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−     * Gets MonetDB's boolean null constant
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−     *
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−     * @return MonetDB's boolean null constant
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−     */
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−    public static native boolean GetBooleanNullConstant();
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−
+
−    /**
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−     * Due to restrictions on the representation of boolean values in the Java language, this method should be called
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−     * to check if a boolean 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 value is null or not
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−     */
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−    public static native boolean CheckBooleanIsNull(boolean value);
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−
+
−    /**
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−     * Array with the retrieved values.
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−     */
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−    private final boolean[] values;
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−
+
−    protected QueryResultSetBooleanColumn(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(Boolean.class)) {
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−            throw new ClassCastException("The parameter must be of boolean type!!");
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−        }
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−        this.values = new boolean[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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−        boolean[] values = this.fetchValuesInternal(this.tablePointer, this.resultSetIndex, startIndex, endIndex);
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−        System.arraycopy(values, 0, this.values, startIndex, values.length);
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−    }
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−
+
−    @Override
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−    protected boolean[] storeNewDataAndGetResult(int startIndex, int numberOfRowsToRetrieve) {
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−        boolean[] result = new boolean[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 boolean[] checkIfIndexesAreNullImplementation(boolean[] values, boolean[] res) throws MonetDBEmbeddedException {
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−        boolean nil = GetBooleanNullConstant();
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−        for(int i = 0 ; i < values.length ; i++) {
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−            res[i] = (values[i] == nil);
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−        }
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−        return res;
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−    }
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−
+
−    @Override
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−    protected Boolean[] mapValuesToObjectArrayImplementation(boolean[] values) throws MonetDBEmbeddedException {
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−        boolean nil = GetBooleanNullConstant();
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−        Boolean[] res = new Boolean[values.length];
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−        for(int i = 0 ; i < values.length ; i++) {
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−            res[i] = (values[i] == nil) ? null : 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 boolean[] fetchValuesInternal(long tablePointer, int resultSetIndex, int startIndex, int endIndex)
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−            throws MonetDBEmbeddedException;
+
−}