| // Copyright 2004 The Apache Software Foundation |
| // |
| // 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 org.apache.tapestry.vlib.ejb; |
| |
| import java.io.Serializable; |
| import java.sql.Timestamp; |
| |
| /** |
| * Represents a single result row from a {@link IBookQuery}. In effect, |
| * this is a light-wieght, serializable, read-only version of an {@link IBook} |
| * bean, plus it contains the owner and holder name (which means we don't |
| * have to go find the correct {@link IPerson} to dig out the name). |
| * |
| * <p>This is provided for efficient access when doing various queries. |
| * |
| * @version $Id$ |
| * @author Howard Lewis Ship |
| * |
| **/ |
| |
| public class Book implements Serializable |
| { |
| private static final long serialVersionUID = -3423550323411938995L; |
| |
| /** |
| * Column index for the Book's primary key. |
| * |
| **/ |
| |
| public static final int ID_COLUMN = 0; |
| |
| /** |
| * Column index for the book title. |
| * |
| **/ |
| |
| public static final int TITLE_COLUMN = 1; |
| |
| public static final int DESCRIPTION_COLUMN = 2; |
| public static final int ISBN_COLUMN = 3; |
| public static final int OWNER_ID_COLUMN = 4; |
| |
| /** |
| * Column index for a presentable version of the holder's name. |
| * |
| * @see IPerson#getNaturalName() |
| * |
| **/ |
| |
| public static final int OWNER_NAME_COLUMN = 5; |
| |
| public static final int HOLDER_ID_COLUMN = 6; |
| public static final int HOLDER_NAME_COLUMN = 7; |
| public static final int PUBLISHER_ID_COLUMN = 8; |
| public static final int PUBLISHER_NAME_COLUMN = 9; |
| public static final int AUTHOR_COLUMN = 10; |
| |
| public static final int HIDDEN_COLUMN = 11; |
| public static final int LENDABLE_COLUMN = 12; |
| public static final int DATE_ADDED_COLUMN = 13; |
| |
| /** |
| * Number of columns in the result. |
| * |
| **/ |
| |
| public static final int N_COLUMNS = 14; |
| |
| private Object[] columns; |
| |
| /** |
| * Constructs a new BookQueryResult, making an internal copy of the columns passed. |
| * |
| **/ |
| |
| public Book(Object[] columns) |
| { |
| if (columns == null) |
| throw new IllegalArgumentException("Must provide a non-null columns."); |
| |
| if (columns.length != N_COLUMNS) |
| throw new IllegalArgumentException("Wrong number of columns for a Book."); |
| |
| this.columns = new Object[N_COLUMNS]; |
| System.arraycopy(columns, 0, this.columns, 0, N_COLUMNS); |
| } |
| |
| private Object get(int index) |
| { |
| return columns[index]; |
| } |
| |
| public Integer getId() |
| { |
| return (Integer) get(ID_COLUMN); |
| } |
| |
| public String getTitle() |
| { |
| return (String) get(TITLE_COLUMN); |
| } |
| |
| public String getDescription() |
| { |
| return (String) get(DESCRIPTION_COLUMN); |
| } |
| |
| public String getISBN() |
| { |
| return (String) get(ISBN_COLUMN); |
| } |
| |
| public Integer getOwnerId() |
| { |
| return (Integer) get(OWNER_ID_COLUMN); |
| } |
| |
| public String getOwnerName() |
| { |
| return (String) get(OWNER_NAME_COLUMN); |
| } |
| |
| public Integer getHolderId() |
| { |
| return (Integer) get(HOLDER_ID_COLUMN); |
| } |
| |
| public String getHolderName() |
| { |
| return (String) get(HOLDER_NAME_COLUMN); |
| } |
| |
| public Integer getPublisherId() |
| { |
| return (Integer) get(PUBLISHER_ID_COLUMN); |
| } |
| |
| public String getPublisherName() |
| { |
| return (String) get(PUBLISHER_NAME_COLUMN); |
| } |
| |
| public String getAuthor() |
| { |
| return (String) get(AUTHOR_COLUMN); |
| } |
| |
| public Timestamp getDateAdded() |
| { |
| return (Timestamp) get(DATE_ADDED_COLUMN); |
| } |
| |
| public String toString() |
| { |
| StringBuffer buffer; |
| |
| buffer = new StringBuffer("Book["); |
| buffer.append(get(ID_COLUMN)); |
| buffer.append(' '); |
| buffer.append(get(TITLE_COLUMN)); |
| buffer.append(']'); |
| |
| return buffer.toString(); |
| } |
| |
| /** |
| * Returns true if the book is borrowed; that is, if its holder doesn't |
| * match its owner. |
| * |
| **/ |
| |
| public boolean isBorrowed() |
| { |
| return !get(HOLDER_ID_COLUMN).equals(get(OWNER_ID_COLUMN)); |
| } |
| |
| public boolean isHidden() |
| { |
| return getBit(HIDDEN_COLUMN); |
| } |
| |
| public boolean isLendable() |
| { |
| return getBit(LENDABLE_COLUMN); |
| } |
| |
| private boolean getBit(int column) |
| { |
| Boolean b = (Boolean) get(column); |
| |
| return b.booleanValue(); |
| } |
| } |