/*
* Copyright 2002-2017 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.beans.factory.support;
import java.util.function.Supplier;
import org.springframework.beans.factory.config.BeanDefinitionCustomizer;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.util.ObjectUtils;
/**
* Programmatic means of constructing
* {@link org.springframework.beans.factory.config.BeanDefinition BeanDefinitions}
* using the builder pattern. Intended primarily for use when implementing Spring 2.0
* {@link org.springframework.beans.factory.xml.NamespaceHandler NamespaceHandlers}.
*
* @author Rod Johnson
* @author Rob Harrop
* @author Juergen Hoeller
* @since 2.0
*/
public class BeanDefinitionBuilder {
/**
* Create a new {@code BeanDefinitionBuilder} used to construct a {@link GenericBeanDefinition}.
*/
public static BeanDefinitionBuilder genericBeanDefinition() {
BeanDefinitionBuilder builder = new BeanDefinitionBuilder();
builder.beanDefinition = new GenericBeanDefinition();
return builder;
}
/**
* Create a new {@code BeanDefinitionBuilder} used to construct a {@link GenericBeanDefinition}.
* @param beanClassName the class name for the bean that the definition is being created for
*/
public static BeanDefinitionBuilder genericBeanDefinition(String beanClassName) {
BeanDefinitionBuilder builder = new BeanDefinitionBuilder();
builder.beanDefinition = new GenericBeanDefinition();
builder.beanDefinition.setBeanClassName(beanClassName);
return builder;
}
/**
* Create a new {@code BeanDefinitionBuilder} used to construct a {@link GenericBeanDefinition}.
* @param beanClass the {@code Class} of the bean that the definition is being created for
*/
public static BeanDefinitionBuilder genericBeanDefinition(Class<?> beanClass) {
BeanDefinitionBuilder builder = new BeanDefinitionBuilder();
builder.beanDefinition = new GenericBeanDefinition();
builder.beanDefinition.setBeanClass(beanClass);
return builder;
}
/**
* Create a new {@code BeanDefinitionBuilder} used to construct a {@link GenericBeanDefinition}.
* @param beanClass the {@code Class} of the bean that the definition is being created for
* @param instanceSupplier a callback for creating an instance of the bean
* @since 5.0
*/
public static <T> BeanDefinitionBuilder genericBeanDefinition(Class<T> beanClass, Supplier<T> instanceSupplier) {
BeanDefinitionBuilder builder = new BeanDefinitionBuilder();
builder.beanDefinition = new GenericBeanDefinition();
builder.beanDefinition.setBeanClass(beanClass);
builder.beanDefinition.setInstanceSupplier(instanceSupplier);
return builder;
}
/**
* Create a new {@code BeanDefinitionBuilder} used to construct a {@link RootBeanDefinition}.
* @param beanClassName the class name for the bean that the definition is being created for
*/
public static BeanDefinitionBuilder rootBeanDefinition(String beanClassName) {
return rootBeanDefinition(beanClassName, null);
}
/**
* Create a new {@code BeanDefinitionBuilder} used to construct a {@link RootBeanDefinition}.
* @param beanClassName the class name for the bean that the definition is being created for
* @param factoryMethodName the name of the method to use to construct the bean instance
*/
public static BeanDefinitionBuilder rootBeanDefinition(String beanClassName, String factoryMethodName) {
BeanDefinitionBuilder builder = new BeanDefinitionBuilder();
builder.beanDefinition = new RootBeanDefinition();
builder.beanDefinition.setBeanClassName(beanClassName);
builder.beanDefinition.setFactoryMethodName(factoryMethodName);
return builder;
}
/**
* Create a new {@code BeanDefinitionBuilder} used to construct a {@link RootBeanDefinition}.
* @param beanClass the {@code Class} of the bean that the definition is being created for
*/
public static BeanDefinitionBuilder rootBeanDefinition(Class<?> beanClass) {
return rootBeanDefinition(beanClass, null);
}
/**
* Create a new {@code BeanDefinitionBuilder} used to construct a {@link RootBeanDefinition}.
* @param beanClass the {@code Class} of the bean that the definition is being created for
* @param factoryMethodName the name of the method to use to construct the bean instance
*/
public static BeanDefinitionBuilder rootBeanDefinition(Class<?> beanClass, String factoryMethodName) {
BeanDefinitionBuilder builder = new BeanDefinitionBuilder();
builder.beanDefinition = new RootBeanDefinition();
builder.beanDefinition.setBeanClass(beanClass);
builder.beanDefinition.setFactoryMethodName(factoryMethodName);
return builder;
}
/**
* Create a new {@code BeanDefinitionBuilder} used to construct a {@link ChildBeanDefinition}.
* @param parentName the name of the parent bean
*/
public static BeanDefinitionBuilder childBeanDefinition(String parentName) {
BeanDefinitionBuilder builder = new BeanDefinitionBuilder();
builder.beanDefinition = new ChildBeanDefinition(parentName);
return builder;
}
/**
* The {@code BeanDefinition} instance we are creating.
*/
private AbstractBeanDefinition beanDefinition;
/**
* Our current position with respect to constructor args.
*/
private int constructorArgIndex;
/**
* Enforce the use of factory methods.
*/
private BeanDefinitionBuilder() {
}
/**
* Return the current BeanDefinition object in its raw (unvalidated) form.
* @see #getBeanDefinition()
*/
public AbstractBeanDefinition getRawBeanDefinition() {
return this.beanDefinition;
}
/**
* Validate and return the created BeanDefinition object.
*/
public AbstractBeanDefinition getBeanDefinition() {
this.beanDefinition.validate();
return this.beanDefinition;
}
/**
* Set the name of the parent definition of this bean definition.
*/
public BeanDefinitionBuilder setParentName(String parentName) {
this.beanDefinition.setParentName(parentName);
return this;
}
/**
* Set the name of a static factory method to use for this definition,
* to be called on this bean's class.
*/
public BeanDefinitionBuilder setFactoryMethod(String factoryMethod) {
this.beanDefinition.setFactoryMethodName(factoryMethod);
return this;
}
/**
* Set the name of a non-static factory method to use for this definition,
* including the bean name of the factory instance to call the method on.
* @since 4.3.6
*/
public BeanDefinitionBuilder setFactoryMethodOnBean(String factoryMethod, String factoryBean) {
this.beanDefinition.setFactoryMethodName(factoryMethod);
this.beanDefinition.setFactoryBeanName(factoryBean);
return this;
}
/**
* Add an indexed constructor arg value. The current index is tracked internally
* and all additions are at the present point.
*/
public BeanDefinitionBuilder addConstructorArgValue(Object value) {
this.beanDefinition.getConstructorArgumentValues().addIndexedArgumentValue(
this.constructorArgIndex++, value);
return this;
}
/**
* Add a reference to a named bean as a constructor arg.
* @see #addConstructorArgValue(Object)
*/
public BeanDefinitionBuilder addConstructorArgReference(String beanName) {
this.beanDefinition.getConstructorArgumentValues().addIndexedArgumentValue(
this.constructorArgIndex++, new RuntimeBeanReference(beanName));
return this;
}
/**
* Add the supplied property value under the given name.
*/
public BeanDefinitionBuilder addPropertyValue(String name, Object value) {
this.beanDefinition.getPropertyValues().add(name, value);
return this;
}
/**
* Add a reference to the specified bean name under the property specified.
* @param name the name of the property to add the reference to
* @param beanName the name of the bean being referenced
*/
public BeanDefinitionBuilder addPropertyReference(String name, String beanName) {
this.beanDefinition.getPropertyValues().add(name, new RuntimeBeanReference(beanName));
return this;
}
/**
* Set the init method for this definition.
*/
public BeanDefinitionBuilder setInitMethodName(String methodName) {
this.beanDefinition.setInitMethodName(methodName);
return this;
}
/**
* Set the destroy method for this definition.
*/
public BeanDefinitionBuilder setDestroyMethodName(String methodName) {
this.beanDefinition.setDestroyMethodName(methodName);
return this;
}
/**
* Set the scope of this definition.
* @see org.springframework.beans.factory.config.BeanDefinition#SCOPE_SINGLETON
* @see org.springframework.beans.factory.config.BeanDefinition#SCOPE_PROTOTYPE
*/
public BeanDefinitionBuilder setScope(String scope) {
this.beanDefinition.setScope(scope);
return this;
}
/**
* Set whether or not this definition is abstract.
*/
public BeanDefinitionBuilder setAbstract(boolean flag) {
this.beanDefinition.setAbstract(flag);
return this;
}
/**
* Set whether beans for this definition should be lazily initialized or not.
*/
public BeanDefinitionBuilder setLazyInit(boolean lazy) {
this.beanDefinition.setLazyInit(lazy);
return this;
}
/**
* Set the autowire mode for this definition.
*/
public BeanDefinitionBuilder setAutowireMode(int autowireMode) {
beanDefinition.setAutowireMode(autowireMode);
return this;
}
/**
* Set the depency check mode for this definition.
*/
public BeanDefinitionBuilder setDependencyCheck(int dependencyCheck) {
beanDefinition.setDependencyCheck(dependencyCheck);
return this;
}
/**
* Append the specified bean name to the list of beans that this definition
* depends on.
*/
public BeanDefinitionBuilder addDependsOn(String beanName) {
if (this.beanDefinition.getDependsOn() == null) {
this.beanDefinition.setDependsOn(beanName);
}
else {
String[] added = ObjectUtils.addObjectToArray(this.beanDefinition.getDependsOn(), beanName);
this.beanDefinition.setDependsOn(added);
}
return this;
}
/**
* Set the role of this definition.
*/
public BeanDefinitionBuilder setRole(int role) {
this.beanDefinition.setRole(role);
return this;
}
/**
* Apply the given customizers to the underlying bean definition.
* @since 5.0
*/
public BeanDefinitionBuilder applyCustomizers(BeanDefinitionCustomizer... customizers) {
if (customizers != null) {
for (BeanDefinitionCustomizer customizer : customizers) {
customizer.customize(beanDefinition);
}
}
return this;
}
}