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21 package org.apache.struts2.views.jsp;
22
23 import javax.servlet.http.HttpServletRequest;
24 import javax.servlet.http.HttpServletResponse;
25 import javax.servlet.jsp.JspException;
26
27 import org.apache.struts2.components.Component;
28 import org.apache.struts2.dispatcher.Dispatcher;
29 import org.apache.struts2.dispatcher.mapper.ActionMapper;
30
31 import com.opensymphony.xwork2.inject.Container;
32 import com.opensymphony.xwork2.inject.Inject;
33 import com.opensymphony.xwork2.util.ValueStack;
34
35 /***
36 */
37 public abstract class ComponentTagSupport extends StrutsBodyTagSupport {
38 protected Component component;
39
40 public abstract Component getBean(ValueStack stack, HttpServletRequest req, HttpServletResponse res);
41
42 public int doEndTag() throws JspException {
43 component.end(pageContext.getOut(), getBody());
44 component = null;
45 return EVAL_PAGE;
46 }
47
48 public int doStartTag() throws JspException {
49 component = getBean(getStack(), (HttpServletRequest) pageContext.getRequest(), (HttpServletResponse) pageContext.getResponse());
50 Container container = Dispatcher.getInstance().getContainer();
51 container.inject(component);
52
53 populateParams();
54 boolean evalBody = component.start(pageContext.getOut());
55
56 if (evalBody) {
57 return component.usesBody() ? EVAL_BODY_BUFFERED : EVAL_BODY_INCLUDE;
58 } else {
59 return SKIP_BODY;
60 }
61 }
62
63 protected void populateParams() {
64 component.setId(id);
65 }
66
67 public Component getComponent() {
68 return component;
69 }
70 }