com.databasesandlife.util.TemporaryFile Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of java-common Show documentation

Utility classes developed at Adrian Smith Software (A.S.S.)

There is a newer version: 21.0.1

package com.databasesandlife.util;

import javax.annotation.Nonnull;
import java.io.File;
import java.io.IOException;

/**
 * Represents a temporary file.
 *   
 * Difference to simply creating a temporary file is that this can be used in a try block and is deleted afterwards.
 *   

 * Usage:
 * 
 *     try (var f = new TemporaryFile("myfile", "jpg")) {
 *         ...
 *     } // deleted here
 * 
 *
 * @author This source is copyright Adrian Smith and licensed under the LGPL 3.
 * @see Project on GitHub
 */
public class TemporaryFile implements AutoCloseable {
    
    public final @Nonnull File file;
    
    public TemporaryFile(@Nonnull String prefix, @Nonnull String extension) {
        try { file = File.createTempFile(prefix, "."+extension); }
        catch (IOException e) { throw new RuntimeException(e); }
    }
    
    @SuppressWarnings("ResultOfMethodCallIgnored")
    @Override public void close() {
        file.delete();
    }
}