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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/* $Id$ */
package org.apache.fop.layoutmgr;
import java.util.Locale;
import org.apache.fop.events.Event;
import org.apache.fop.events.EventFormatter;
import org.apache.fop.events.EventExceptionManager.ExceptionFactory;
/**
* Exception thrown by FOP if an unrecoverable layout error occurs. An example: An area overflows
* a viewport that has overflow="error-if-overflow".
*
* TODO Discuss if this should become a checked exception.
*/
public class LayoutException extends RuntimeException {
private static final long serialVersionUID = 5157080040923740433L;
private String localizedMessage;
private LayoutManager layoutManager;
/**
* Constructs a new layout exception with the specified detail message.
* @param message the detail message.
*/
public LayoutException(String message) {
this(message, null);
}
/**
* Constructs a new layout exception with the specified detail message.
* @param message the detail message
* @param lm the layout manager that throws the exception
*/
public LayoutException(String message, LayoutManager lm) {
super(message);
this.layoutManager = lm;
}
/**
* Sets the localized message for this exception.
* @param msg the localized message
*/
public void setLocalizedMessage(String msg) {
this.localizedMessage = msg;
}
/** {@inheritDoc} */
public String getLocalizedMessage() {
if (this.localizedMessage != null) {
return this.localizedMessage;
} else {
return super.getLocalizedMessage();
}
}
/**
* Returns the layout manager that detected the problem.
* @return the layout manager (or null)
*/
public LayoutManager getLayoutManager() {
return this.layoutManager;
}
/** Exception factory for {@link LayoutException}. */
public static class LayoutExceptionFactory implements ExceptionFactory {
/** {@inheritDoc} */
public Throwable createException(Event event) {
Object source = event.getSource();
LayoutManager lm = (source instanceof LayoutManager) ? (LayoutManager)source : null;
String msg = EventFormatter.format(event, Locale.ENGLISH);
LayoutException ex = new LayoutException(msg, lm);
if (!Locale.ENGLISH.equals(Locale.getDefault())) {
ex.setLocalizedMessage(EventFormatter.format(event));
}
return ex;
}
/** {@inheritDoc} */
public Class getExceptionClass() {
return LayoutException.class;
}
}
}
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