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22 package org.apache.tiles.request.freemarker.render;
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24 import java.io.IOException;
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26 import javax.servlet.ServletException;
27 import javax.servlet.http.HttpServletRequest;
28 import javax.servlet.http.HttpServletResponse;
29
30 import org.apache.tiles.request.Request;
31 import org.apache.tiles.request.freemarker.FreemarkerRequestException;
32 import org.apache.tiles.request.render.CannotRenderException;
33 import org.apache.tiles.request.render.Renderer;
34 import org.apache.tiles.request.servlet.ExternalWriterHttpServletResponse;
35 import org.apache.tiles.request.servlet.ServletRequest;
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46 public class FreemarkerRenderer implements Renderer {
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51 private AttributeValueFreemarkerServlet servlet;
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58 public FreemarkerRenderer(AttributeValueFreemarkerServlet servlet) {
59 this.servlet = servlet;
60 }
61
62
63 @Override
64 public void render(String path, Request request) throws IOException {
65 if (path == null) {
66 throw new CannotRenderException("Cannot dispatch a null path");
67 }
68 ServletRequest servletRequest = org.apache.tiles.request.servlet.ServletUtil.getServletRequest(request);
69 HttpServletRequest httpRequest = servletRequest.getRequest();
70 HttpServletResponse httpResponse = servletRequest.getResponse();
71 servlet.setValue(path);
72 try {
73 servlet.doGet(httpRequest,
74 new ExternalWriterHttpServletResponse(httpResponse,
75 request.getPrintWriter()));
76 } catch (ServletException e) {
77 throw new FreemarkerRequestException("Exception when rendering a FreeMarker attribute", e);
78 }
79 }
80
81
82 public boolean isRenderable(String path, Request request) {
83 return path != null && path.startsWith("/") && path.endsWith(".ftl");
84 }
85 }