/*
* Copyright 2012-2017 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.boot.web.servlet;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.servlet.Registration;
import org.springframework.core.Conventions;
import org.springframework.core.Ordered;
import org.springframework.util.Assert;
/**
* Base class for Servlet 3.0+ based registration beans.
*
* @author Phillip Webb
* @since 1.4.0
* @see ServletRegistrationBean
* @see FilterRegistrationBean
* @see DelegatingFilterProxyRegistrationBean
* @see ServletListenerRegistrationBean
*/
public abstract class RegistrationBean implements ServletContextInitializer, Ordered {
private String name;
private int order = Ordered.LOWEST_PRECEDENCE;
private boolean asyncSupported = true;
private boolean enabled = true;
private Map<String, String> initParameters = new LinkedHashMap<>();
/**
* Set the name of this registration. If not specified the bean name will be used.
* @param name the name of the registration
*/
public void setName(String name) {
Assert.hasLength(name, "Name must not be empty");
this.name = name;
}
/**
* Sets if asynchronous operations are support for this registration. If not specified
* defaults to {@code true}.
* @param asyncSupported if async is supported
*/
public void setAsyncSupported(boolean asyncSupported) {
this.asyncSupported = asyncSupported;
}
/**
* Returns if asynchronous operations are support for this registration.
* @return if async is supported
*/
public boolean isAsyncSupported() {
return this.asyncSupported;
}
/**
* Flag to indicate that the registration is enabled.
* @param enabled the enabled to set
*/
public void setEnabled(boolean enabled) {
this.enabled = enabled;
}
/**
* Return if the registration is enabled.
* @return if enabled (default {@code true})
*/
public boolean isEnabled() {
return this.enabled;
}
/**
* Set init-parameters for this registration. Calling this method will replace any
* existing init-parameters.
* @param initParameters the init parameters
* @see #getInitParameters
* @see #addInitParameter
*/
public void setInitParameters(Map<String, String> initParameters) {
Assert.notNull(initParameters, "InitParameters must not be null");
this.initParameters = new LinkedHashMap<>(initParameters);
}
/**
* Returns a mutable Map of the registration init-parameters.
* @return the init parameters
*/
public Map<String, String> getInitParameters() {
return this.initParameters;
}
/**
* Add a single init-parameter, replacing any existing parameter with the same name.
* @param name the init-parameter name
* @param value the init-parameter value
*/
public void addInitParameter(String name, String value) {
Assert.notNull(name, "Name must not be null");
this.initParameters.put(name, value);
}
/**
* Deduces the name for this registration. Will return user specified name or fallback
* to convention based naming.
* @param value the object used for convention based names
* @return the deduced name
*/
protected final String getOrDeduceName(Object value) {
return (this.name != null ? this.name : Conventions.getVariableName(value));
}
/**
* Configure registration base settings.
* @param registration the registration
*/
protected void configure(Registration.Dynamic registration) {
Assert.state(registration != null,
"Registration is null. Was something already registered for name=["
+ this.name + "]?");
registration.setAsyncSupported(this.asyncSupported);
if (!this.initParameters.isEmpty()) {
registration.setInitParameters(this.initParameters);
}
}
/**
* Set the order of the registration bean.
* @param order the order
*/
public void setOrder(int order) {
this.order = order;
}
/**
* Get the order of the registration bean.
* @return the order
*/
@Override
public int getOrder() {
return this.order;
}
}