/*
* Copyright 2002-2007 the original author or authors.
*
* 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 org.springframework.web.servlet.view;
import org.springframework.beans.factory.InitializingBean;
/**
* Abstract base class for URL-based views. Provides a consistent way of
* holding the URL that a View wraps, in the form of a "url" bean property.
*
* @author Juergen Hoeller
* @since 13.12.2003
*/
public abstract class AbstractUrlBasedView extends AbstractView implements InitializingBean {
private String url;
/**
* Constructor for use as a bean.
*/
protected AbstractUrlBasedView() {
}
/**
* Create a new AbstractUrlBasedView with the given URL.
* @param url the URL to forward to
*/
protected AbstractUrlBasedView(String url) {
this.url = url;
}
/**
* Set the URL of the resource that this view wraps.
* The URL must be appropriate for the concrete View implementation.
*/
public void setUrl(String url) {
this.url = url;
}
/**
* Return the URL of the resource that this view wraps.
*/
public String getUrl() {
return this.url;
}
public void afterPropertiesSet() throws Exception {
if (isUrlRequired() && getUrl() == null) {
throw new IllegalArgumentException("Property 'url' is required");
}
}
/**
* Return whether the 'url' property is required.
* <p>The default implementation returns <code>true</code.
* This can be overridden in subclasses.
*/
protected boolean isUrlRequired() {
return true;
}
public String toString() {
StringBuffer sb = new StringBuffer(super.toString());
sb.append("; URL [").append(getUrl()).append("]");
return sb.toString();
}
}