1 files changed, 110 insertions, 0 deletions
diff --git a/connector_lib/src/main/java/at/asitplus/eidas/specific/connector/gui/SpringMvcGuiFormBuilderImpl.java b/connector_lib/src/main/java/at/asitplus/eidas/specific/connector/gui/SpringMvcGuiFormBuilderImpl.java
new file mode 100644
index 00000000..63028db2
--- /dev/null
+++ b/connector_lib/src/main/java/at/asitplus/eidas/specific/connector/gui/SpringMvcGuiFormBuilderImpl.java
@@ -0,0 +1,110 @@
+package at.asitplus.eidas.specific.connector.gui;
+
+import java.util.Locale;
+import java.util.Map;
+
+import javax.annotation.Nullable;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.servlet.LocaleResolver;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.View;
+import org.springframework.web.servlet.ViewResolver;
+
+import at.gv.egiz.eaaf.core.api.gui.IGuiBuilderConfiguration;
+import at.gv.egiz.eaaf.core.api.gui.ISpringMvcGuiFormBuilder;
+import at.gv.egiz.eaaf.core.exceptions.GuiBuildException;
+
+public class SpringMvcGuiFormBuilderImpl implements ISpringMvcGuiFormBuilder {
+	private static final Logger log = LoggerFactory.getLogger(SpringMvcGuiFormBuilderImpl.class);
+	
+	private @Autowired(required=false) ViewResolver[] viewResolvers;
+	private @Autowired(required=false) LocaleResolver localeResolver;
+	
+	@Override
+	public void build(HttpServletRequest httpReq, HttpServletResponse httpResp, IGuiBuilderConfiguration config,
+			String loggerName) throws GuiBuildException {
+		build(httpReq, httpResp, config, null, loggerName);
+
+	}
+
+	@Override
+	public void build(HttpServletRequest httpReq, HttpServletResponse httpResp, IGuiBuilderConfiguration config,
+			String contentType, String loggerName) throws GuiBuildException {
+		try {
+			final ModelAndView mav = new ModelAndView(config.getViewName());		
+			if (config.getViewParameters() != null)
+				mav.addAllObjects(config.getViewParameters());
+					
+			render(mav, httpReq, httpResp);
+			
+		} catch (final Exception e) {
+			log.info("Can NOT generate GUI for illustration", e);
+			throw new GuiBuildException(e.getMessage(), e);
+			
+		}
+
+	}
+	
+	protected void render(ModelAndView mv, HttpServletRequest request, HttpServletResponse response) throws Exception {
+		// Determine locale for request and apply it to the response.
+		final Locale locale =
+				(this.localeResolver != null ? this.localeResolver.resolveLocale(request) : request.getLocale());
+		response.setLocale(locale);
+
+		View view;
+		final String viewName = mv.getViewName();
+		if (viewName != null) {
+			// We need to resolve the view name.
+			view = resolveViewName(viewName, mv.getModelMap(), locale, request);
+			if (view == null)
+				throw new ServletException("Could not resolve view with name '" + mv.getViewName() + "' ");
+			
+		} else {
+			// No need to lookup: the ModelAndView object contains the actual View object.
+			view = mv.getView();
+			if (view == null)
+				throw new ServletException("ModelAndView [" + mv + "] neither contains a view name nor a " + "View object ");
+				
+		}
+
+		// Delegate to the View object for rendering.
+		if (log.isTraceEnabled())
+			log.trace("Rendering view [" + view + "] ");
+			
+		try {
+			if (mv.getStatus() != null)
+				response.setStatus(mv.getStatus().value());
+				
+			view.render(mv.getModelMap(), request, response);
+			
+		} catch (final Exception ex) {
+			if (log.isDebugEnabled())
+				log.debug("Error rendering view [" + view + "]", ex);
+			
+			throw ex;
+			
+		}
+		
+	}
+	
+	protected View resolveViewName(String viewName, @Nullable Map<String, Object> model,
+			Locale locale, HttpServletRequest request) throws Exception {
+		if (viewResolvers != null) {
+			for (final ViewResolver viewResolver : this.viewResolvers) {
+				final View view = viewResolver.resolveViewName(viewName, locale);
+				if (view != null)
+					return view;
+				
+			}
+		}
+		
+		return null;
+	}
+
+}