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/*
* 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;
}
}
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