001: /**
002: * EasyBeans
003: * Copyright (C) 2006 Bull S.A.S.
004: * Contact: easybeans@ow2.org
005: *
006: * This library is free software; you can redistribute it and/or
007: * modify it under the terms of the GNU Lesser General Public
008: * License as published by the Free Software Foundation; either
009: * version 2.1 of the License, or any later version.
010: *
011: * This library is distributed in the hope that it will be useful,
012: * but WITHOUT ANY WARRANTY; without even the implied warranty of
013: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014: * Lesser General Public License for more details.
015: *
016: * You should have received a copy of the GNU Lesser General Public
017: * License along with this library; if not, write to the Free Software
018: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
019: * USA
020: *
021: * --------------------------------------------------------------------------
022: * $Id: SessionBusinessInterfaceFinder.java 1970 2007-10-16 11:49:25Z benoitf $
023: * --------------------------------------------------------------------------
024: */package org.ow2.easybeans.deployment.annotations.helper.bean.session;
025:
026: import org.ow2.easybeans.deployment.annotations.impl.JLocal;
027: import org.ow2.easybeans.deployment.annotations.impl.JRemote;
028: import org.ow2.easybeans.deployment.annotations.metadata.ClassAnnotationMetadata;
029:
030: /**
031: * This class finds the business interface if there are no business interfaces
032: * specified.
033: * @author Florent Benoit
034: */
035: public final class SessionBusinessInterfaceFinder {
036:
037: /**
038: * Helper class, no public constructor.
039: */
040: private SessionBusinessInterfaceFinder() {
041: }
042:
043: /**
044: * Finds business interface in a session bean.
045: * @see <a href="http://www.jcp.org/en/jsr/detail?id=220">EJB 3.0 Spec ?4.6.6</a>
046: * @param sessionBean Session bean to analyze
047: */
048: public static void resolve(final ClassAnnotationMetadata sessionBean) {
049:
050: JLocal jLocal = sessionBean.getLocalInterfaces();
051: JRemote jRemote = sessionBean.getRemoteInterfaces();
052:
053: // No business interface or empty annotation (@Remote or @Local)
054: if ((jLocal == null && jRemote == null)
055: || (jLocal == null && jRemote != null && jRemote
056: .getInterfaces().isEmpty())
057: || (jRemote == null && jLocal != null && jLocal
058: .getInterfaces().isEmpty())) {
059:
060: // The following interfaces are excluded when determining whether
061: // the bean class has
062: // more than one interface: java.io.Serializable;
063: // java.io.Externalizable;
064: // any of the interfaces defined by the javax.ejb package.
065: String[] interfaces = sessionBean.getInterfaces();
066: int numberItfFound = 0;
067: String itfFound = null;
068: for (String itf : interfaces) {
069: if (!itf.equals(java.io.Serializable.class.getName()
070: .replace(".", "/"))
071: && !itf.equals(java.io.Externalizable.class
072: .getName().replace(".", "/"))
073: && !itf.startsWith("javax/ejb")) {
074: itfFound = itf;
075: numberItfFound++;
076: }
077: }
078:
079: // No business interface found
080: if (numberItfFound == 0) {
081: // if this is a 2.1 bean, it could be normal
082: if (sessionBean.getRemoteHome() != null
083: || sessionBean.getLocalHome() != null) {
084: return;
085: }
086: throw new IllegalStateException(
087: "No business interface found on bean class '"
088: + sessionBean.getClassName() + "'.");
089: }
090:
091: if (numberItfFound > 1) {
092: throw new IllegalStateException(
093: "More than 1 itf on class '"
094: + sessionBean.getClassName() + "'.");
095: }
096:
097: // If bean class implements a single interface, that interface is
098: // assumed to be the business
099: // interface of the bean. This business interface will be a local
100: // interface unless the
101: // interface is designated as a remote business interface by use of
102: // the Remote annotation
103: // on the bean class or interface or by means of the deployment
104: // descriptor.
105:
106: // Build a local interface if no @Remote annotation, else add interface in the existing object
107: if (jRemote == null) {
108: JLocal addedJLocal = new JLocal();
109: addedJLocal.addInterface(itfFound);
110: sessionBean.setLocalInterfaces(addedJLocal);
111: } else {
112: jRemote.addInterface(itfFound);
113: sessionBean.setRemoteInterfaces(jRemote);
114: }
115:
116: }
117: }
118: }
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