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The Checker Framework enhances Java's type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

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package org.checkerframework.framework.stub;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

/** {@link File}-based implementation of {@link StubResource}. */
public class FileStubResource implements StubResource {
    private final File file;

    /**
     * Constructs a {@code StubResource} for the specified stub file.
     *
     * @param file the stub file
     */
    public FileStubResource(File file) {
        this.file = file;
    }

    @Override
    public String getDescription() {
        return file.getAbsolutePath();
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return new FileInputStream(file);
    }
}