diff options
Diffstat (limited to 'branches/sca-java-2.0-M4/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/runtime/jsp/ReferenceTag.java')
-rw-r--r-- | branches/sca-java-2.0-M4/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/runtime/jsp/ReferenceTag.java | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/branches/sca-java-2.0-M4/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/runtime/jsp/ReferenceTag.java b/branches/sca-java-2.0-M4/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/runtime/jsp/ReferenceTag.java new file mode 100644 index 0000000000..b4655e3d95 --- /dev/null +++ b/branches/sca-java-2.0-M4/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/runtime/jsp/ReferenceTag.java @@ -0,0 +1,97 @@ +/* + * 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.implementation.web.runtime.jsp; + +import javax.servlet.ServletContext; +import javax.servlet.jsp.JspException; +import javax.servlet.jsp.PageContext; +import javax.servlet.jsp.tagext.TagSupport; + +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.oasisopen.sca.ServiceReference; + +/** + * 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 { + + ServletContext servletContext = pageContext.getServletContext(); + RuntimeComponent component = (RuntimeComponent)servletContext.getAttribute("org.apache.tuscany.sca.implementation.web.RuntimeComponent"); + if (component == null) { + throw new JspException("No Web component found. Is there an <implementation.web> missing?"); + } + + Class<?> typeClass; + try { + typeClass = Class.forName(type, true, Thread.currentThread().getContextClassLoader()); + } catch (ClassNotFoundException e) { + throw new JspException("Reference '" + name + "' type class not found: " + type); + } + + ServiceReference<?> sr = component.getComponentContext().getServiceReference(typeClass, name); + if (sr == null) { + throw new JspException("Reference '" + name + "' undefined"); + } + + pageContext.setAttribute(name, sr.getService(), 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; + } +} |