/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

package sun.tools.jstat;

import java.util.*;

/**

 * A class to represent the format for a column of data.

 *

 * @author Brian Doherty

 * @since 1.5

 */

public class ColumnFormat extends OptionFormat {

    private int number;

    private int width;

    private Alignment align = Alignment.CENTER;

    private Scale scale = Scale.RAW;

    private String format;

    private String header;

    private Expression expression;

    private Object previousValue;

    public ColumnFormat(int number) {

        super("Column" + number);

        this.number = number;

    }

    /*

     * method to apply various validation rules to the ColumnFormat object.

     */

    public void validate() throws ParserException {

        // if we allow column spanning, then this method must change. it

        // should allow null data statments

        if (expression == null) {

            // current policy is that a data statment must be specified

            throw new ParserException("Missing data statement in column " + number);

        }

        if (header == null) {

            // current policy is that if a header is not specified, then we

            // will use the last component of the name as the header and

            // insert the default anchor characters for center alignment..

            throw new ParserException("Missing header statement in column " + number);

        }

        if (format == null) {

            // if no formating is specified, then the format is set to output

            // the raw data.

            format="0";

        }

    }

    public void setWidth(int width) {

        this.width = width;

    }

    public void setAlignment(Alignment align) {

        this.align = align;

    }

    public void setScale(Scale scale) {

        this.scale = scale;

    }

    public void setFormat(String format) {

        this.format = format;

    }

    public void setHeader(String header) {

        this.header = header;

    }

    public String getHeader() {

        return header;

    }

    public String getFormat() {

        return format;

    }

    public int getWidth() {

        return width;

    }

    public Alignment getAlignment() {

        return align;

    }

    public Scale getScale() {

        return scale;

    }

    public Expression getExpression() {

        return expression;

    }

    public void setExpression(Expression e) {

        this.expression = e;

    }

    public void setPreviousValue(Object o) {

        this.previousValue = o;

    }

    public Object getPreviousValue() {

        return previousValue;

    }

    public void printFormat(int indentLevel) {

        String indentAmount = "  ";

        StringBuilder indent = new StringBuilder("");

        for (int j = 0; j < indentLevel; j++) {

            indent.append(indentAmount);

        }

        System.out.println(indent + name + " {");

        System.out.println(indent + indentAmount + "name=" + name

                + ";data=" + expression.toString() + ";header=" + header

                + ";format=" + format + ";width=" + width

                + ";scale=" + scale.toString() + ";align=" + align.toString());

        for (Iterator i = children.iterator();  i.hasNext(); /* empty */) {

            OptionFormat of = (OptionFormat)i.next();

            of.printFormat(indentLevel+1);

        }

        System.out.println(indent + "}");

    }

    public String getValue() {

        return null;

    }

}