Added UI (JSF) and JPA to bayesian network entities.

[simdecs.git] / src / java / org / ufcspa / simdecs / bn / ui / util / JsfUtil.java

diff --git a/src/java/org/ufcspa/simdecs/bn/ui/util/JsfUtil.java b/src/java/org/ufcspa/simdecs/bn/ui/util/JsfUtil.java
new file mode 100644 (file)
index 0000000..8a83a97
--- /dev/null
+++ b/src/java/org/ufcspa/simdecs/bn/ui/util/JsfUtil.java
@@ -0,0 +1,59 @@
+package org.ufcspa.simdecs.bn.ui.util;
+
+import java.util.List;
+import javax.faces.application.FacesMessage;
+import javax.faces.component.UIComponent;
+import javax.faces.context.FacesContext;
+import javax.faces.convert.Converter;
+import javax.faces.model.SelectItem;
+
+public class JsfUtil {
+
+    public static SelectItem[] getSelectItems(List<?> entities, boolean selectOne) {
+        int size = selectOne ? entities.size() + 1 : entities.size();
+        SelectItem[] items = new SelectItem[size];
+        int i = 0;
+        if (selectOne) {
+            items[0] = new SelectItem("", "---");
+            i++;
+        }
+        for (Object x : entities) {
+            items[i++] = new SelectItem(x, x.toString());
+        }
+        return items;
+    }
+
+    public static void addErrorMessage(Exception ex, String defaultMsg) {
+        String msg = ex.getLocalizedMessage();
+        if (msg != null && msg.length() > 0) {
+            addErrorMessage(msg);
+        } else {
+            addErrorMessage(defaultMsg);
+        }
+    }
+
+    public static void addErrorMessages(List<String> messages) {
+        for (String message : messages) {
+            addErrorMessage(message);
+        }
+    }
+
+    public static void addErrorMessage(String msg) {
+        FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, msg);
+        FacesContext.getCurrentInstance().addMessage(null, facesMsg);
+    }
+
+    public static void addSuccessMessage(String msg) {
+        FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_INFO, msg, msg);
+        FacesContext.getCurrentInstance().addMessage("successInfo", facesMsg);
+    }
+
+    public static String getRequestParameter(String key) {
+        return FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get(key);
+    }
+
+    public static Object getObjectFromRequestParameter(String requestParameterName, Converter converter, UIComponent component) {
+        String theId = JsfUtil.getRequestParameter(requestParameterName);
+        return converter.getAsObject(FacesContext.getCurrentInstance(), component, theId);
+    }
+}
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