From b6869036b7839b4540cee1114f44bc5c9b33d9c4 Mon Sep 17 00:00:00 2001
From: Josh Walters <josh@joshwalters.com>
Date: Tue, 13 Dec 2011 17:35:57 -0800
Subject: Initial commit of code.

---
 .../bookcatalog/isbnlookup/GDataISBNLookup.java    | 158 +++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 src/com/joshwalters/bookcatalog/isbnlookup/GDataISBNLookup.java

(limited to 'src/com/joshwalters/bookcatalog/isbnlookup/GDataISBNLookup.java')

diff --git a/src/com/joshwalters/bookcatalog/isbnlookup/GDataISBNLookup.java b/src/com/joshwalters/bookcatalog/isbnlookup/GDataISBNLookup.java
new file mode 100644
index 0000000..dc670b3
--- /dev/null
+++ b/src/com/joshwalters/bookcatalog/isbnlookup/GDataISBNLookup.java
@@ -0,0 +1,158 @@
+/*
+ *      Book Catalog - Catalog your book collection.
+ *      
+ *      Copyright (C) 2009 Joshua Walters
+ *      URL: http://joshwalters.com
+ *      
+ *      This file is part of Book Catalog.
+ *      
+ *      Book Catalog is free software: you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation, either version 3 of the License, or
+ *      (at your option) any later version.
+ *      
+ *      Book Catalog 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 Book Catalog.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.joshwalters.bookcatalog.isbnlookup;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.List;
+
+import com.google.gdata.client.books.BooksService;
+import com.google.gdata.client.books.VolumeQuery;
+import com.google.gdata.data.books.VolumeEntry;
+import com.google.gdata.data.books.VolumeFeed;
+import com.google.gdata.data.dublincore.Creator;
+import com.google.gdata.data.dublincore.Subject;
+import com.google.gdata.data.dublincore.Title;
+import com.google.gdata.util.ServiceException;
+
+/**
+ * Performs book lookup with GData.
+ * 
+ * @author Josh Walters
+ */
+public class GDataISBNLookup extends ISBNLookup {
+
+	/**
+	 * Used for looking up the book.
+	 */
+	private BooksService service;
+	/**
+	 * The URL for the Google volumes feed.
+	 */
+	public final String FEED_URL = "http://books.google.com/books/feeds/volumes";
+
+	/**
+	 * Sets up the book service.
+	 */
+	public GDataISBNLookup() {
+		service = new BooksService("BookCatalog-1.0");
+	}
+
+	/**
+	 * Searches for a book.
+	 */
+	public void searchBooks(String barcode) throws NoBookFound,
+			InvalidSearchTerms {
+		// Clear all the book data fields
+		emptyDataFields();
+		// Purify the barcode, get the price if possible, and return just the
+		// ISBN
+		ISBN = purifyBarcode(barcode);
+		// Perform the query
+		VolumeQuery query;
+		try {
+			query = new VolumeQuery(new URL(FEED_URL));
+			query.setFullTextQuery(ISBN);
+			// Only return one result
+			query.setMaxResults(1);
+			VolumeFeed volumeFeed = service.query(query, VolumeFeed.class);
+			// Process the result
+			processVolumeFeed(volumeFeed);
+		} catch (MalformedURLException e) {
+			// Print the error to the error stream
+			System.err.println(e.getMessage());
+		} catch (IOException e) {
+			// Print the error to the error stream
+			System.err.println(e.getMessage());
+		} catch (ServiceException e) {
+			// Print the error to the error stream
+			System.err.println(e.getMessage());
+		}
+	}
+
+	/**
+	 * Processes the result feed to get the book data.
+	 * 
+	 * @param volumeFeed
+	 * @throws IOException
+	 * @throws ServiceException
+	 * @throws NoBookFound
+	 */
+	private void processVolumeFeed(VolumeFeed volumeFeed) throws IOException,
+			ServiceException, NoBookFound {
+		List<VolumeEntry> volumeEntries = volumeFeed.getEntries();
+		if (volumeEntries.size() == 0) {
+			throw new NoBookFound();
+		}
+		// Send the data to be stored in the class
+		storeVolumeEntry(volumeEntries.get(0));
+	}
+
+	/**
+	 * Store the data in the class variables.
+	 * 
+	 * @param entry
+	 * @throws IOException
+	 * @throws ServiceException
+	 */
+	private void storeVolumeEntry(VolumeEntry entry) throws IOException,
+			ServiceException {
+		// Get the book title(s).
+		for (Title t : entry.getTitles()) {
+			if (title == null) {
+				title = t.getValue();
+			} else {
+				title += ", " + t.getValue();
+			}
+		}
+		// Get the book creator(s).
+		for (Creator c : entry.getCreators()) {
+			if (author == null) {
+				author = c.getValue();
+			} else {
+				author += ", " + c.getValue();
+			}
+		}
+		// Get the book date.
+		if (entry.getDates().size() > 0) {
+			date = entry.getDates().get(0).getValue();
+		}
+		// Get the book description.
+		if (entry.getDescriptions().size() > 0) {
+			description = entry.getDescriptions().get(0).getValue();
+		}
+		// Get the book subject(s).
+		for (Subject s : entry.getSubjects()) {
+			if (subject == null) {
+				subject = s.getValue();
+			} else {
+				subject += ", " + s.getValue();
+			}
+		}
+		// Get the book publisher.
+		if (entry.getPublishers().size() > 0) {
+			publisher = entry.getPublishers().get(0).getValue();
+		}
+	}
+}
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