com.jn.langx.io.resource.ResourceLoader Maven / Gradle / Ivy
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package com.jn.langx.io.resource;
import com.jn.langx.annotation.Nullable;
public interface ResourceLoader {
/**
* Return a Resource handle for the specified resource location.
* The handle should always be a reusable resource descriptor,
* allowing for multiple {@link Resource#getInputStream()} calls.
*
* - Must support fully qualified URLs, e.g. "file:C:/test.dat".
*
- Must support classpath pseudo-URLs, e.g. "classpath:test.dat".
*
- Should support relative file paths, e.g. "WEB-INF/test.dat".
* (This will be implementation-specific, typically provided by an
* ApplicationContext implementation.)
*
* Note that a Resource handle does not imply an existing resource;
* you need to invoke {@link Resource#exists} to check for existence.
*
* @param location the resource location
* @return a corresponding Resource handle (never {@code null})
* @see Resource#exists()
* @see Resource#getInputStream()
*/
V loadResource(String location);
/**
* Expose the ClassLoader used by this ResourceLoader.
* Clients which need to access the ClassLoader directly can do so
* in a uniform manner with the ResourceLoader, rather than relying
* on the thread context ClassLoader.
*
* @return the ClassLoader
* (only {@code null} if even the system ClassLoader isn't accessible)
*/
@Nullable
ClassLoader getClassLoader();
}