integrate Spring ModelAndView into EAAF GUI framework

1 files changed, 47 insertions, 21 deletions

diff --git a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/gui/AbstractGUIFormBuilderImpl.java b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/gui/AbstractVelocityGUIFormBuilderImpl.java
index 7273ccc8..65e13b5a 100644
--- a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/gui/AbstractGUIFormBuilderImpl.java
+++ b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/gui/AbstractVelocityGUIFormBuilderImpl.java
@@ -35,6 +35,7 @@ import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;
 
+import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import org.apache.commons.lang3.StringUtils;
@@ -45,7 +46,8 @@ import org.slf4j.LoggerFactory;
 
 import at.gv.egiz.eaaf.core.api.data.EAAFConstants;
 import at.gv.egiz.eaaf.core.api.gui.IGUIBuilderConfiguration;
-import at.gv.egiz.eaaf.core.api.gui.IGUIFormBuilder;
+import at.gv.egiz.eaaf.core.api.gui.IVelocityGUIBuilderConfiguration;
+import at.gv.egiz.eaaf.core.api.gui.IVelocityGuiFormBuilder;
 import at.gv.egiz.eaaf.core.exceptions.GUIBuildException;
 import at.gv.egiz.eaaf.core.impl.gui.velocity.VelocityProvider;
 
@@ -53,43 +55,65 @@ import at.gv.egiz.eaaf.core.impl.gui.velocity.VelocityProvider;
  * @author tlenz 
  *
  */
-public abstract class AbstractGUIFormBuilderImpl implements IGUIFormBuilder {
-	private static final Logger log = LoggerFactory.getLogger(AbstractGUIFormBuilderImpl.class);
+public abstract class AbstractVelocityGUIFormBuilderImpl implements IVelocityGuiFormBuilder {
+	private static final Logger log = LoggerFactory.getLogger(AbstractVelocityGUIFormBuilderImpl.class);
 	private static final String DEFAULT_CONTENT_TYPE = EAAFConstants.CONTENTTYPE_HTML_UTF8;
 			
 	private VelocityEngine engine;
 		
-	public AbstractGUIFormBuilderImpl() throws GUIBuildException {
+	public AbstractVelocityGUIFormBuilderImpl() throws GUIBuildException {
 		try {
 			engine = VelocityProvider.getClassPathVelocityEngine();
 			
-		} catch (Exception e) {
+		} catch (final Exception e) {
 			log.error("Initialization of Velocity-Engine to render GUI components FAILED.", e);
 			throw new GUIBuildException("Initialization of Velocity-Engine to render GUI components FAILED.", e);
 			
 		}
 		
 	}
+
+	@Override
+	public final void build(HttpServletRequest httpReq, HttpServletResponse httpResp, IGUIBuilderConfiguration config,
+			String loggerName) throws GUIBuildException {
+		if (config instanceof IVelocityGUIBuilderConfiguration)
+			build(httpReq, httpResp, config, loggerName);
+		else
+			throw new IllegalStateException(this.getClass().getName() + " needs a " + IVelocityGUIBuilderConfiguration.class.getName());
 		
-	public void build(HttpServletResponse httpResp, IGUIBuilderConfiguration config, String loggerName) throws GUIBuildException {
-		build(httpResp, config, getInternalContentType(config), loggerName);
 		
 	}
+
+	@Override
+	public final void build(HttpServletRequest httpReq, HttpServletResponse httpResp, IGUIBuilderConfiguration config,
+			String contentType, String loggerName) throws GUIBuildException {
+		if (config instanceof IVelocityGUIBuilderConfiguration)
+			build(httpReq, httpResp, config, loggerName);
+		else
+			throw new IllegalStateException(this.getClass().getName() + " needs a " + IVelocityGUIBuilderConfiguration.class.getName());
 		
+	}
+	
 	@Override
-	public void build(HttpServletResponse httpResp, IGUIBuilderConfiguration config, 
+	public void build(HttpServletRequest httpReq, HttpServletResponse httpResp, IVelocityGUIBuilderConfiguration config, String loggerName) throws GUIBuildException {
+		build(httpReq, httpResp, config, getInternalContentType(config), loggerName);
+		
+	}
+	
+	@Override
+	public void build(HttpServletRequest httpReq, HttpServletResponse httpResp, IVelocityGUIBuilderConfiguration config, 
 			String contentType, String loggerName) throws GUIBuildException {
 		
 		InputStream is = null;
 		try {
-			String viewName = config.getViewName();			
+			final String viewName = config.getViewName();			
 			is = getTemplateInputStream(config);
 			
 			//build Velocity Context from input paramters
-			VelocityContext context = buildContextFromViewParams(config.getViewParameters());
+			final VelocityContext context = buildContextFromViewParams(config.getViewParameters());
 
 			//evaluate template
-			StringWriter writer = new StringWriter();
+			final StringWriter writer = new StringWriter();
 			engine.evaluate(context, writer, loggerName, new BufferedReader(new InputStreamReader(is)));
 							
 			//write template to response
@@ -104,12 +128,12 @@ public abstract class AbstractGUIFormBuilderImpl implements IGUIFormBuilder {
 						+ ". Contentsize:" + String.valueOf(content.length)
 						+ " BufferSize:" + httpResp.getBufferSize()
 						+ " ContentType:" + contentType);
-				for (String el : httpResp.getHeaderNames())
+				for (final String el : httpResp.getHeaderNames())
 					log.trace(" * Headername:" + el + " Value:" + httpResp.getHeader(el));
 				
 			}
 			
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			log.error("GUI form-builder has an internal error.", e);
 			throw new GUIBuildException("GUI form-builder has an internal error.", e);
 						
@@ -118,7 +142,7 @@ public abstract class AbstractGUIFormBuilderImpl implements IGUIFormBuilder {
 				try {
 					is.close();
 					
-				} catch (IOException e) {
+				} catch (final IOException e) {
 					log.error("Can NOT close GUI-Template InputStream.", e);
 					
 				}
@@ -132,7 +156,8 @@ public abstract class AbstractGUIFormBuilderImpl implements IGUIFormBuilder {
 	 * @param config
 	 * @return
 	 */
-	public VelocityContext generateVelocityContextFromConfiguration(IGUIBuilderConfiguration config) {
+	@Override
+	public VelocityContext generateVelocityContextFromConfiguration(IVelocityGUIBuilderConfiguration config) {
 		return buildContextFromViewParams(config.getViewParameters());
 		
 	}
@@ -144,7 +169,8 @@ public abstract class AbstractGUIFormBuilderImpl implements IGUIFormBuilder {
 	 * @return An {@link InputStream} but never null. The {@link InputStream} had to be closed be the invoking method
 	 * @throws GUIBuildException
 	 */
-	public InputStream getTemplateInputStream(IGUIBuilderConfiguration config) throws GUIBuildException {
+	@Override
+	public InputStream getTemplateInputStream(IVelocityGUIBuilderConfiguration config) throws GUIBuildException {
 		InputStream is = config.getTemplate(config.getViewName());
 		if (is == null) {
 			log.trace("Loading GUI template:" + config.getViewName() + " from default resources ... ");
@@ -167,13 +193,13 @@ public abstract class AbstractGUIFormBuilderImpl implements IGUIFormBuilder {
 	 * @return
 	 * @throws GUIBuildException
 	 */
-	abstract protected InputStream getInternalTemplate(IGUIBuilderConfiguration config) throws GUIBuildException;
+	abstract protected InputStream getInternalTemplate(IVelocityGUIBuilderConfiguration config) throws GUIBuildException;
 
 	
 	/**
 	 * @return
 	 */ 
-	protected String getInternalClasspathTemplateDir(IGUIBuilderConfiguration config, String defaultClassPathDir) {
+	protected String getInternalClasspathTemplateDir(IVelocityGUIBuilderConfiguration config, String defaultClassPathDir) {
 		String dir = config.getClasspathTemplateDir();
 		if (dir != null) {
 			if (!dir.endsWith("/"))
@@ -190,12 +216,12 @@ public abstract class AbstractGUIFormBuilderImpl implements IGUIFormBuilder {
 	 * @return
 	 */
 	private VelocityContext buildContextFromViewParams(Map<String, Object> viewParams) {
-		VelocityContext context = new VelocityContext();
+		final VelocityContext context = new VelocityContext();
 				
 		if (viewParams != null) {
-			Iterator<Entry<String, Object>> interator = viewParams.entrySet().iterator();
+			final Iterator<Entry<String, Object>> interator = viewParams.entrySet().iterator();
 			while (interator.hasNext()) {
-				Entry<String, Object> el = interator.next();
+				final Entry<String, Object> el = interator.next();
 				context.put(el.getKey(), el.getValue());
 			}