From: Roland Haeder <roland@mxchange.org>
Date: Fri, 16 Oct 2015 07:48:41 +0000 (+0200)
Subject: Continued:
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=9a60900169da6da6f2eed0c1d6f0b73aa827c50d;p=addressbook-mailer-ejb.git

Continued:
- implemented business method startSharing()
- added private method isUserAlreadySharingAddressbook() to check if the address book's owner is already sharing it with the sharee
Signed-off-by:Roland Häder <roland@mxchange.org>
---

diff --git a/src/java/org/mxchange/addressbook/model/shared/SharedAddressbooksSessionBean.java b/src/java/org/mxchange/addressbook/model/shared/SharedAddressbooksSessionBean.java
index 8407f00..b276bbb 100644
--- a/src/java/org/mxchange/addressbook/model/shared/SharedAddressbooksSessionBean.java
+++ b/src/java/org/mxchange/addressbook/model/shared/SharedAddressbooksSessionBean.java
@@ -18,9 +18,12 @@ package org.mxchange.addressbook.model.shared;
 
 import java.text.MessageFormat;
 import java.util.List;
+import java.util.Objects;
 import javax.ejb.Stateless;
 import javax.persistence.NoResultException;
 import javax.persistence.Query;
+import org.mxchange.addressbook.exceptions.UserAlreadySharingAddressbookException;
+import org.mxchange.addressbook.model.addressbook.Addressbook;
 import org.mxchange.addressbook.model.addressbook.shared.AddressbookShare;
 import org.mxchange.addressbook.model.addressbook.shared.ShareableAddressbook;
 import org.mxchange.jcoreee.database.BaseDatabaseBean;
@@ -85,7 +88,7 @@ public class SharedAddressbooksSessionBean extends BaseDatabaseBean implements S
 			this.shares = query.getResultList();
 
 			// Debug message
-			this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserSharingAddressbooks: shares.size()={0}", this.shares.size()));
+			this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserSharingAddressbooks: shares.size()={0}", this.shares.size())); //NOI18N
 
 			// Is it not empty?
 			isSharing = (!this.shares.isEmpty());
@@ -100,4 +103,99 @@ public class SharedAddressbooksSessionBean extends BaseDatabaseBean implements S
 		// Return it
 		return isSharing;
 	}
+
+	@Override
+	public ShareableAddressbook startSharing (final User sharee, final Addressbook addressbook) throws UserAlreadySharingAddressbookException {
+		// Trace message
+		this.getLoggerBeanLocal().logTrace(MessageFormat.format("startSharing: sharee={0},addressbook={1} - CALLED!", sharee, addressbook)); //NOI18N
+
+		// Check all conditions
+		if (null == sharee) {
+			// Throw NPE
+			throw new NullPointerException("sharee is null"); //NOI18N
+		} else if (sharee.getUserId() == null) {
+			// Throw NPE again
+			throw new NullPointerException("sharee.userId is null"); //NOI18N
+		} else if (sharee.getUserId() < 1) {
+			// Invalid id number
+			throw new IllegalStateException(MessageFormat.format("sharee.userId={0} is invalid", sharee.getUserId())); //NOI18N
+		} else if (null == addressbook) {
+			// Throw NPE again
+			throw new NullPointerException("addressbook is null"); //NOI18N
+		} else if (addressbook.getAddressbookId() == null) {
+			// Throw NPE again
+			throw new NullPointerException("addressbook.addressbookId is null"); //NOI18N
+		} else if (addressbook.getAddressbookId() < 1) {
+			// Invalid id number
+			throw new IllegalArgumentException(MessageFormat.format("addressbook.addressbookId={0} is invalid.", addressbook.getAddressbookId())); //NOI18N
+		} else if (Objects.equals(addressbook.getAddressbookUser(), sharee)) {
+			// Sharing with yourself!
+			throw new IllegalStateException("User tries to share with himself."); //NOI18N
+		}
+
+		// Is the entry already there?
+		if (this.isUserAlreadySharingAddressbook(addressbook, sharee)) {
+			// Abort here
+			throw new UserAlreadySharingAddressbookException(addressbook, sharee);
+		}
+
+		// All fine so far, then create the instance
+		ShareableAddressbook share = new AddressbookShare(addressbook, sharee);
+
+		// Debug message
+		this.getLoggerBeanLocal().logDebug(MessageFormat.format("startSharing: share={0}", share));
+
+		// Persist it
+		this.getEntityManager().persist(share);
+
+		// Flush to get id number
+		this.getEntityManager().flush();
+
+		// Return updated instance
+		return share;
+	}
+
+	/**
+	 * Checks whether the owner of the given address book is already sharing it
+	 * with the sharee.
+	 * <p>
+	 * @param addressbook Address book to be shared with
+	 * @param sharee User sharee instance
+	 * @return Wether the address book is already shared with the sharee
+	 */
+	private boolean isUserAlreadySharingAddressbook (final Addressbook addressbook, final User sharee) {
+		// Trace message
+		this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserAlreadySharingAddressbook: addressbook={0},sharee={1} - CALLED!", addressbook, sharee)); //NOI18N
+
+		// Get named query
+		Query query = this.getEntityManager().createNamedQuery("SearchShareeAddressbookShare", AddressbookShare.class); //NOI18N
+
+		// Set parameter
+		query.setParameter("addressbook", addressbook); //NOI18N
+		query.setParameter("sharee", sharee); //NOI18N
+
+		// Default is not found
+		boolean isFound = false;
+
+		// Try it
+		try {
+			// Get single instance
+			ShareableAddressbook share = (ShareableAddressbook) query.getSingleResult();
+
+			// Debug message
+			this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserAlreadySharingAddressbook: share={0} - FOUND!", share)); //NOI18N
+
+			// Set found
+			isFound = true;
+		} catch (final NoResultException ex) {
+			// Not found, log exception
+			this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserAlreadySharingAddressbook: Notfound. Exception: {0}", ex)); //NOI18N
+		}
+
+		// Trace message
+		this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserAlreadySharingAddressbook: isFound={0} - EXIT!", isFound)); //NOI18N
+
+		// Return it
+		return isFound;
+	}
 }