resultbase.java

来自「数据仓库展示程序」· Java 代码 · 共 129 行

/*
// $Id: //open/mondrian/src/main/mondrian/olap/ResultBase.java#7 $
// This software is subject to the terms of the Common Public License
// Agreement, available at the following URL:
// http://www.opensource.org/licenses/cpl.html.
// (C) Copyright 2001-2005 Kana Software, Inc. and others.
// All Rights Reserved.
// You must accept the terms of that agreement to use this software.
//
// jhyde, 10 August, 2001
*/

package mondrian.olap;

import org.apache.log4j.Logger;
import java.io.PrintWriter;

/**
 * Skeleton implementation of {@link Result}.
 *
 * @author jhyde
 * @since 10 August, 2001
 * @version $Id: //open/mondrian/src/main/mondrian/olap/ResultBase.java#7 $
 */
public abstract class ResultBase implements Result {
    protected final Query query;
    protected final Axis[] axes;
    protected Axis slicerAxis;

    protected ResultBase(Query query, Axis[] axes) {
        this.query = query;
        this.axes = axes;
    }

    protected abstract Logger getLogger();

    public Query getQuery() {
        return query;
    }

    // implement Result
    public Axis[] getAxes() {
        return axes;
    }
    // implement Result
    public Axis getSlicerAxis() {
        return slicerAxis;
    }
    // implement Result
    public void print(PrintWriter pw) {
        for (int i = -1; i < axes.length; i++) {
            pw.println("Axis #" + (i + 1) + ":");
            printAxis(pw, i < 0 ? slicerAxis : axes[i]);
        }
        // Usually there are 3 axes: {slicer, columns, rows}. Position is a
        // {column, row} pair. We call printRows with axis=2. When it recurses
        // to axis=-1, it prints.
        int[] pos = new int[axes.length];
        printRows(pw, axes.length - 1, pos);
    }
    private void printRows(PrintWriter pw, int axis, int[] pos) {
        Axis _axis = axis < 0 ? slicerAxis : axes[axis];
        for (int i = 0, count = _axis.positions.length; i < count; i++) {
            if (axis < 0) {
                if (i > 0) {
                    pw.print(", ");
                }
                printCell(pw, pos);
            } else {
                pos[axis] = i;
                if (axis == 0) {
                    int row = axis + 1 < pos.length ? pos[axis + 1] : 0;
                    pw.print("Row #" + row + ": ");
                }
                printRows(pw, axis - 1, pos);
                if (axis == 0) {
                    pw.println();
                }
            }
        }
    }
    private void printAxis(PrintWriter pw, Axis axis) {
        for (int i = 0; i < axis.positions.length; i++) {
            Position position = axis.positions[i];
            pw.print("{");
            for (int j = 0; j < position.members.length; j++) {
                Member member = position.members[j];
                if (j > 0) {
                    pw.print(", ");
                }
                pw.print(member.getUniqueName());
            }
            pw.println("}");
        }
    }
    private void printCell(PrintWriter pw, int[] pos) {
        Cell cell = getCell(pos);
        pw.print(cell.getFormattedValue());
    }

    /**
     * Returns the current member of a given dimension at a given location.
     **/
    public Member getMember(int[] pos, Dimension dimension) {
        for (int i = -1; i < axes.length; i++) {
            Axis axis = slicerAxis;
            int index = 0;
            if (i >= 0) {
                axis = axes[i];
                index = pos[i];
            }
            Position position = axis.positions[index];
            for (int j = 0; j < position.members.length; j++) {
                Member member = position.members[j];
                if (member.getDimension() == dimension) {
                    return member;
                }
            }
        }
        return dimension.getHierarchy().getDefaultMember();
    }

    public void close() {
    }
}


// End ResultBase.java