PageAddress.java

package edu.stanford.hci.r3.pattern.coordinates;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import edu.stanford.hci.r3.util.DebugUtils;

public class PageAddress {

        private static final Pattern PATTERN_ADDRESS = Pattern.compile("(.*?)\\.(.*?)\\.(.*?)\\.(.*)");

        private int book;

        private int page;

        private int segment;

        private int shelf;

        public PageAddress(int theSegment, int theShelf, int theBook, int thePage) {
                segment = theSegment;
                shelf = theShelf;
                book = theBook;
                page = thePage;
        }

        public PageAddress(String pageAddress) {
                // extract the segment, shelf, book, and page from the pageAddress
                final Matcher matcherPageAddress = PATTERN_ADDRESS.matcher(pageAddress);
                if (matcherPageAddress.find()) {
                        String segmentStr = matcherPageAddress.group(1);
                        String shelfStr = matcherPageAddress.group(2);
                        String bookStr = matcherPageAddress.group(3);
                        String pageStr = matcherPageAddress.group(4);

                        // DebugUtils.println(segmentStr + "_" + shelfStr + "_" + bookStr + "_" + pageStr);

                        segment = Integer.parseInt(segmentStr);
                        shelf = Integer.parseInt(shelfStr);
                        book = Integer.parseInt(bookStr);
                        page = Integer.parseInt(pageStr);
                } else {
                        System.err.println("PageAddress: " + pageAddress
                                        + " is not a valid logical page address.");
                        // do nothing, and leave all the fields blank
                }
        }

        public int getBook() {
                return book;
        }

        public int getPage() {
                return page;
        }

        public int getSegment() {
                return segment;
        }

        public int getShelf() {
                return shelf;
        }

        public String toString() {
                return segment + "." + shelf + "." + book + "." + page;
        }

}

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