1 files changed, 118 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6-TUSCANY-3909/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/jsp/ReferenceTag.java b/sca-java-1.x/tags/1.6-TUSCANY-3909/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/jsp/ReferenceTag.java
new file mode 100644
index 0000000000..b7eb93222e
--- /dev/null
+++ b/sca-java-1.x/tags/1.6-TUSCANY-3909/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/jsp/ReferenceTag.java
@@ -0,0 +1,118 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.tuscany.sca.host.webapp.jsp;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.jsp.JspException;
+import javax.servlet.jsp.PageContext;
+import javax.servlet.jsp.tagext.TagSupport;
+
+import org.apache.tuscany.sca.host.embedded.SCADomain;
+import org.apache.tuscany.sca.host.webapp.WebAppServletHost;
+import org.osoa.sca.ComponentContext;
+
+/**
+ * Tag to handle SCA references
+ * <sca:reference name="service" type="test.MyService" scope="1" />
+ *
+ * @version $Rev$ $Date$
+ */
+public class ReferenceTag extends TagSupport {
+    private static final long serialVersionUID = 1L;
+
+    protected String name;
+    protected String type;
+    protected Integer scope = PageContext.PAGE_SCOPE;
+
+    @Override
+    public int doStartTag() throws JspException {
+        return SKIP_BODY;
+    }
+
+    @Override
+    public int doEndTag() throws JspException {
+
+        try {
+            WebAppServletHost.getInstance().init(pageContext.getServletConfig());
+        } catch (ServletException e) {
+            throw new JspException("Exception initializing Tuscany webapp: " + e, e);
+        }
+ 
+        ServletContext servletContext = pageContext.getServletContext();
+        ComponentContext componentContext = (ComponentContext)servletContext.getAttribute("org.osoa.sca.ComponentContext");
+        SCADomain scaDomain = null;
+        if (componentContext == null) {
+            scaDomain = (SCADomain)servletContext.getAttribute(WebAppServletHost.SCA_DOMAIN_ATTRIBUTE);
+            if (scaDomain == null) {
+                throw new JspException("SCADomain is null. Check Tuscany configuration in web.xml");
+            }
+        }
+
+        Class<?> typeClass;
+        try {
+            typeClass = Class.forName(type, true, Thread.currentThread().getContextClassLoader());
+        } catch (ClassNotFoundException e) {
+            throw new JspException("Reference '" + name + "' type class not found: " + type);
+        }
+
+        Object o;
+        try {
+            if (componentContext != null) {
+                o = componentContext.getService(typeClass, name);
+            } else {
+                o = scaDomain.getService(typeClass, name);
+            }
+        } catch (Exception e) {
+            throw new JspException("Exception getting service for reference'" + name + "': " + e, e);
+        }
+        if (o == null) {
+            throw new JspException("Reference '" + name + "' not found");
+        }
+
+        pageContext.setAttribute(name, o, scope);
+
+        return EVAL_PAGE;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getScope() {
+        return scope;
+    }
+
+    public void setScope(Integer scope) {
+        this.scope = scope;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+}