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package com.moodysalem.phantomjs.wrapper;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.file.Files;

/**
 * This input stream deletes the file after closing. This is used to deliver the result of a render call so that
 * files are not left on disk after usage.
 */
class DeleteOnCloseFileInputStream extends FileInputStream {
    private File file;

    DeleteOnCloseFileInputStream(File file) throws FileNotFoundException {
        super(file);
        this.file = file;
    }

    @Override
    public void close() throws IOException {
        try {
            super.close();
        } finally {
            if (file != null) {
                Files.deleteIfExists(file.toPath());
            }
        }
    }
}