+
−/*
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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.
+
− */
+
−
+
−package nl.cwi.monetdb.embedded.resultset;
+
−
+
−import nl.cwi.monetdb.embedded.env.MonetDBEmbeddedException;
+
−
+
−/**
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− * A MonetDB column converted to an array of Java float values.
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− *
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− * @author <a href="mailto:pedro.ferreira@monetdbsolutions.com">Pedro Ferreira</a>
+
− */
+
−public class QueryResultSetFloatColumn extends AbstractQueryResultSetColumn<float[]> {
+
−
+
−    /**
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−     * MonetDB's float null constant.
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−     */
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−    private static float FloatNullConstant;
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−
+
−    /**
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−     * Gets MonetDB's float null constant
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−     *
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−     * @return MonetDB's float null constant
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−     */
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−    public static float GetFloatNullConstant() { return FloatNullConstant; }
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−
+
−    /**
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−     * Array with the retrieved values.
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−     */
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−    private final float[] values;
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−
+
−    protected QueryResultSetFloatColumn(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(Float.class)) {
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−            throw new ClassCastException("The parameter must be of float type!!");
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−        }
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−        this.values = new float[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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−        float[] 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 float[] storeNewDataAndGetResult(int startIndex, int numberOfRowsToRetrieve) {
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−        float[] result = new float[numberOfRowsToRetrieve];
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−        System.arraycopy(this.values, startIndex, result, 0, numberOfRowsToRetrieve);
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−        return result;
+
−    }
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−
+
−    @Override
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−    protected boolean[] checkIfIndexesAreNullImplementation(float[] values, boolean[] res) throws MonetDBEmbeddedException {
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−        for(int i = 0 ; i < values.length ; i++) {
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−            res[i] = (values[i] == FloatNullConstant);
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−        }
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−        return res;
+
−    }
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−
+
−    @Override
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−    protected Float[] mapValuesToObjectArrayImplementation(float[] values) throws MonetDBEmbeddedException {
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−        Float[] res = new Float[values.length];
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−        for(int i = 0 ; i < values.length ; i++) {
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−            res[i] = (values[i] == FloatNullConstant) ? null : values[i];
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−        }
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−        return res;
+
−    }
+
−
+
−    /**
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−     * Internal implementation to fetch values from the column.
+
−     */
+
−    private native float[] fetchValuesInternal(long tablePointer, int resultSetIndex, int startIndex, int endIndex)
+
−            throws MonetDBEmbeddedException;
+
−}