com.g2forge.alexandria.java.resource.SingleThreadResource Maven / Gradle / Ivy

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Standard Java library and the basis of the ${alexandria.name} project.

There is a newer version: 0.0.18

package com.g2forge.alexandria.java.resource;

import com.g2forge.alexandria.java.close.ICloseable;

public class SingleThreadResource implements ICloseableResource {
	protected final ThreadLocal local = new ThreadLocal<>();

	public void close(T value) {
		if (local.get() != value) throw new IllegalStateException();
		local.remove();
	}

	@Override
	public T get() {
		return local.get();
	}

	@Override
	public ICloseable open(T value) {
		if (local.get() != null) throw new IllegalStateException();
		local.set(value);
		return () -> close(value);
	}
}