1 files changed, 122 insertions, 0 deletions
diff --git a/server/src/com/vaadin/terminal/CompositeErrorMessage.java b/server/src/com/vaadin/terminal/CompositeErrorMessage.java
new file mode 100644
index 0000000000..e86102ae3b
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+++ b/server/src/com/vaadin/terminal/CompositeErrorMessage.java
@@ -0,0 +1,122 @@
+/* 
+ * Copyright 2011 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.vaadin.terminal;
+
+import java.util.Collection;
+import java.util.Iterator;
+
+/**
+ * Class for combining multiple error messages together.
+ * 
+ * @author Vaadin Ltd
+ * @since 3.0
+ */
+@SuppressWarnings("serial")
+public class CompositeErrorMessage extends AbstractErrorMessage {
+
+    /**
+     * Constructor for CompositeErrorMessage.
+     * 
+     * @param errorMessages
+     *            the Array of error messages that are listed togeter. Nulls are
+     *            ignored, but at least one message is required.
+     */
+    public CompositeErrorMessage(ErrorMessage[] errorMessages) {
+        super(null);
+        setErrorLevel(ErrorLevel.INFORMATION);
+
+        for (int i = 0; i < errorMessages.length; i++) {
+            addErrorMessage(errorMessages[i]);
+        }
+
+        if (getCauses().size() == 0) {
+            throw new IllegalArgumentException(
+                    "Composite error message must have at least one error");
+        }
+
+    }
+
+    /**
+     * Constructor for CompositeErrorMessage.
+     * 
+     * @param errorMessages
+     *            the Collection of error messages that are listed together. At
+     *            least one message is required.
+     */
+    public CompositeErrorMessage(
+            Collection<? extends ErrorMessage> errorMessages) {
+        super(null);
+        setErrorLevel(ErrorLevel.INFORMATION);
+
+        for (final Iterator<? extends ErrorMessage> i = errorMessages
+                .iterator(); i.hasNext();) {
+            addErrorMessage(i.next());
+        }
+
+        if (getCauses().size() == 0) {
+            throw new IllegalArgumentException(
+                    "Composite error message must have at least one error");
+        }
+    }
+
+    /**
+     * Adds a error message into this composite message. Updates the level
+     * field.
+     * 
+     * @param error
+     *            the error message to be added. Duplicate errors are ignored.
+     */
+    private void addErrorMessage(ErrorMessage error) {
+        if (error != null && !getCauses().contains(error)) {
+            addCause(error);
+            if (error.getErrorLevel().intValue() > getErrorLevel().intValue()) {
+                setErrorLevel(error.getErrorLevel());
+            }
+        }
+    }
+
+    /**
+     * Gets Error Iterator.
+     * 
+     * @return the error iterator.
+     */
+    public Iterator<ErrorMessage> iterator() {
+        return getCauses().iterator();
+    }
+
+    /**
+     * Returns a comma separated list of the error messages.
+     * 
+     * @return String, comma separated list of error messages.
+     */
+    @Override
+    public String toString() {
+        String retval = "[";
+        int pos = 0;
+        for (final Iterator<ErrorMessage> i = getCauses().iterator(); i
+                .hasNext();) {
+            if (pos > 0) {
+                retval += ",";
+            }
+            pos++;
+            retval += i.next().toString();
+        }
+        retval += "]";
+
+        return retval;
+    }
+}