spring BeanDefinitionResource 源码
spring BeanDefinitionResource 代码
文件路径：/spring-beans/src/main/java/org/springframework/beans/factory/support/BeanDefinitionResource.java
/*
* Copyright 2002-2018 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
*
* https://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.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.core.io.AbstractResource;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Descriptive {@link org.springframework.core.io.Resource} wrapper for
* a {@link org.springframework.beans.factory.config.BeanDefinition}.
*
* @author Juergen Hoeller
* @since 2.5.2
* @see org.springframework.core.io.DescriptiveResource
*/
class BeanDefinitionResource extends AbstractResource {
private final BeanDefinition beanDefinition;
/**
* Create a new BeanDefinitionResource.
* @param beanDefinition the BeanDefinition object to wrap
*/
public BeanDefinitionResource(BeanDefinition beanDefinition) {
Assert.notNull(beanDefinition, "BeanDefinition must not be null");
this.beanDefinition = beanDefinition;
}
/**
* Return the wrapped BeanDefinition object.
*/
public final BeanDefinition getBeanDefinition() {
return this.beanDefinition;
}
@Override
public boolean exists() {
return false;
}
@Override
public boolean isReadable() {
return false;
}
@Override
public InputStream getInputStream() throws IOException {
throw new FileNotFoundException(
"Resource cannot be opened because it points to " + getDescription());
}
@Override
public String getDescription() {
return "BeanDefinition defined in " + this.beanDefinition.getResourceDescription();
}
/**
* This implementation compares the underlying BeanDefinition.
*/
@Override
public boolean equals(@Nullable Object other) {
return (this == other || (other instanceof BeanDefinitionResource &&
((BeanDefinitionResource) other).beanDefinition.equals(this.beanDefinition)));
}
/**
* This implementation returns the hash code of the underlying BeanDefinition.
*/
@Override
public int hashCode() {
return this.beanDefinition.hashCode();
}
}
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