de.ing_poetter.binview.variables.IntegerVariable.java Source code

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Here is the source code for de.ing_poetter.binview.variables.IntegerVariable.java

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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>
 *
 */
package de.ing_poetter.binview.variables;

import org.jdom2.Element;

/**
 * @author Lars P&ouml;tter
 * (<a href=mailto:Lars_Poetter@gmx.de>Lars_Poetter@gmx.de</a>)
 */
public class IntegerVariable extends Variable {
    public final static String SIGNED_ELEMENT_NAME = "signed";
    private final boolean signed;
    public final static String VALUE_PRESENTATION_ELEMENT_NAME = "valuePresentation";
    private String valuePresenation;

    /**
     * @param curVar
     *
     */
    public IntegerVariable(final Element variable) {
        super(variable);
        signed = Boolean.parseBoolean(variable.getChildText(SIGNED_ELEMENT_NAME));
        valuePresenation = variable.getChildText(VALUE_PRESENTATION_ELEMENT_NAME);
        checkVariablePresentation();
    }

    private IntegerVariable(final String name, final int bitNum, final boolean signed,
            final String valuePresentation) {
        super();
        this.Name = name;
        this.numBits = bitNum;
        this.signed = signed;
        this.valuePresenation = valuePresentation;
        checkVariablePresentation();
    }

    @Override
    public String getTypeName() {
        return "int";
    }

    @Override
    public String describeValue(final boolean[] data, final int requestedNameLength) {
        long val = 0;
        for (int i = 0; i < data.length; i++) {
            if (true == data[i]) {
                val = val + (1 << ((numBits - 1) - i));
            }
            // else 0 * something = nothing
        }
        if (true == signed) {
            // TODO
        }
        final StringBuffer sb = createNameDescription();
        final int spaces = requestedNameLength - sb.length();
        for (int i = 0; i < spaces; i++) {
            sb.append(" ");
        }
        return sb.toString() + ": " + String.format(valuePresenation, val);
        // return sb.toString() + ": " + val;
    }

    @Override
    protected Element[] getExtraConfiguration() {
        final Element[] res = new Element[2];
        final Element signEle = new Element(SIGNED_ELEMENT_NAME);
        signEle.setText("" + signed);
        res[0] = signEle;

        final Element descrEle = new Element(VALUE_PRESENTATION_ELEMENT_NAME);
        descrEle.setText(valuePresenation);
        res[1] = descrEle;
        return res;
    }

    public static Variable getVariable(final String name, final int bitNum, final boolean isSigned,
            final String valuePresentation) {
        if (false == isNameValid(name)) {
            return null;
        }
        return new IntegerVariable(name, bitNum, isSigned, valuePresentation);
    }

    private void checkVariablePresentation() {
        if (null == valuePresenation) {
            valuePresenation = "%d";
        } else {
            if (2 > valuePresenation.length()) {
                valuePresenation = "%d";
            }
        }
    }

    private StringBuffer createNameDescription() {
        final StringBuffer sb = new StringBuffer();
        sb.append(Name);
        sb.append(" (" + numBits + "bit ");
        if (true == signed) {
            sb.append("signed)");
        } else {
            sb.append("unsigned)");
        }
        return sb;
    }

    @Override
    public int getDescriptionLength() {
        final StringBuffer sb = createNameDescription();
        return sb.length();
    }

}