+
−/*
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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 2008-2015 MonetDB B.V.
+
− */
+
−
+
−package nl.cwi.monetdb.embedded.column;
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−
+
−import nl.cwi.monetdb.embedded.EmbeddedQueryResult;
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−
+
−import java.util.Iterator;
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−
+
−/**
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− *  Am abstract class for accessing, 
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− *  materialised (Java-level) query result columns.
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− *
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− * @param <T> A primitive or String type
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− */
+
−public abstract class Column<T> implements Iterable<T> {
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−
+
−	/**
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−	 * The name of the column in the query result
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−	 */
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−	protected final String columnName;
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−
+
−	/**
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−	 * The type of the column in the query result
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−	 */
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−	protected final String columnType;
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−
+
−	/**
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−	 * The size/length of the column.
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−	 */
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−	protected final int columnSize;
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−
+
−    /**
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−     * Array with null values;
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−     */
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−    protected final boolean[] nullIndex;
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−
+
−	public Column(EmbeddedQueryResult result, int index, boolean[] nullIndex) {
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−		this.columnName = result.getColumnNames()[index];
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−		this.columnType = result.getColumnTypes()[index];
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−		this.columnSize = result.getColumnSizes()[index];
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−        this.nullIndex = nullIndex;
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− 	}
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−
+
−	/**
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−	 * Get the name of the column.
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−	 *
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−	 * @return Column name
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−	 */
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−	public String getColumnName() {
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−		return columnName;
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−	}
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−
+
−	/**
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−	 * Get the type of the column.
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−	 *
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−	 * @return Column type
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−	 */
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−	public String getColumnType() { return columnType; }
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−
+
−	/**
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−	 * Get the size of the column.
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−	 *
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−	 * @return Column size
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−	 */
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−	public int getColumnSize() { return columnSize; }
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−
+
−    /**
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−     * Get the array mapping of null values
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−     *
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−     * @return Null values
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−     */
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−    public boolean[] getNullindex() { return nullIndex; }
+
−
+
−    /**
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−	 * Get a (non-primary-type) value at index of a column.
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−	 *
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−	 * @param index Column index for the value
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−	 * @return Value, cloud be {@code null}
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−	 */
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−	public T getValue(int index) {
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−		if (index < 0) {
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−			throw new ArrayIndexOutOfBoundsException("The index must be larger than 0!");
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−		} else if (index >= this.columnSize) {
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−			throw new ArrayIndexOutOfBoundsException("The index must be smaller than the number of elements in the column!");
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−		}
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−		return this.getValueImplementation(index);
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−	}
+
−
+
−	/**
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−	 * Get all values of the column
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−	 *
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−	 * @return All values of the column
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−	 */
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−	public abstract T[] getAllValues();
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−
+
−	protected abstract T getValueImplementation(int index);
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−
+
−	@Override
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−	public Iterator<T> iterator() {
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−		return new Iterator<T>() {
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−			private int currentIndex = 0;
+
−
+
−			@Override
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−			public boolean hasNext() {
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−				return (currentIndex < getColumnSize());
+
−			}
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−
+
−			@Override
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−			public T next() {
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−				return getValue(currentIndex++);
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−			}
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−		};
+
−	}
+
−}