UspsPackage.java

/*
 * Copyright 2015 Robin Stuart
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package uk.org.okapibarcode.backend;

import java.awt.geom.Rectangle2D;

/**
 * USPS Intelligent Mail Package Barcode (IMpb)<br>
 * A linear barcode based on GS1-128. Includes additional data checks.
 * Specification at https://ribbs.usps.gov/intelligentmail_package/documents/tech_guides/BarcodePackageIMSpec.pdf
 *
 * @author <a href="mailto:rstuart114@gmail.com">Robin Stuart</a>
 */
public class UspsPackage extends Symbol{

    @Override
    public boolean encode() {
        String hrt;
        String spacedHrt;
        boolean fourTwenty = false;
        int bracketCount = 0;

        if (debug) {
            System.out.printf("IM Package Data Content = \"%s\"\n", content);
        }

        if (!(content.matches("[0-9\\[\\]]+"))) {
            /* Input must be numeric only */
            error_msg = "Invalid IMpd data";
            return false;
        }

        if ((content.length() % 2) != 0) {
            /* Input must be even length */
            error_msg = "Invalid IMpd data";
            return false;
        }

        Code128 code128 = new Code128();
        code128.unsetCc();
        code128.setDataType(Symbol.DataType.GS1);
        code128.setContent(content);

        if (content.length() > 4) {
            fourTwenty = ((content.charAt(1) == '4') && (content.charAt(2) == '2') &&
                    (content.charAt(3) == '0'));
        }

        hrt = "";
        for (int i = 0; i < content.length(); i++) {
            if (content.charAt(i) == '[') {
                bracketCount++;
            }
            if (!(fourTwenty && bracketCount < 2)) {
                if ((content.charAt(i) >= '0') && (content.charAt(i) <= '9')) {
                    hrt += content.charAt(i);
                }
            }
        }

        spacedHrt = "";
        for(int i = 0; i < hrt.length(); i++) {
            spacedHrt += hrt.charAt(i);
            if (i % 4 == 3) {
                spacedHrt += " ";
            }
        }

        readable = spacedHrt;
        pattern = new String[1];
        pattern[0] = code128.pattern[0];
        row_count = 1;
        row_height = new int[1];
        row_height[0] = -1;
        plotSymbol();

        return true;
    }

    @Override
    protected void plotSymbol() {
        int xBlock;
        int x, y, w, h;
        boolean black;
        int offset = 20;
        int yoffset = 15;
        String banner = "USPS TRACKING #";

        rectangles.clear();
        texts.clear();
        y = yoffset;
        h = 0;
        black = true;
        x = 0;
        for (xBlock = 0; xBlock < pattern[0].length(); xBlock++) {
            w = pattern[0].charAt(xBlock) - '0';
            if (black) {
                if (row_height[0] == -1) {
                    h = default_height;
                } else {
                    h = row_height[0];
                }
                if (w != 0 && h != 0) {
                    Rectangle2D.Double rect = new Rectangle2D.Double(x + offset, y, w, h);
                    rectangles.add(rect);
                }
                symbol_width = x + w + (2 * offset);
            }
            black = !black;
            x += w;
        }
        symbol_height = h + (2 * yoffset);

        // Add boundary bars
        Rectangle2D.Double topBar = new Rectangle2D.Double(0, 0, symbol_width, 2);
        Rectangle2D.Double bottomBar = new Rectangle2D.Double(0, symbol_height - 2, symbol_width, 2);
        rectangles.add(topBar);
        rectangles.add(bottomBar);

        double centerX = getWidth() / 2.0;
        texts.add(new TextBox(centerX, getHeight() - 6.0, readable));
        texts.add(new TextBox(centerX, 12.0, banner));
    }
}