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/*
 * Copyright The WildFly Authors
 * SPDX-License-Identifier: Apache-2.0
 */
package org.wildfly.clustering.session.cache.attributes;

import java.util.Collections;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;

import org.wildfly.clustering.session.ImmutableSessionAttributes;

/**
 * An immutable "snapshot" of a session's attributes which can be accessed outside the scope of a transaction.
 * @author Paul Ferraro
 */
public class SimpleImmutableSessionAttributes implements ImmutableSessionAttributes {

	private final Map attributes;

	public SimpleImmutableSessionAttributes(ImmutableSessionAttributes attributes) {
		this(attributes.getAttributeNames().stream().collect(Collectors.toUnmodifiableMap(Function.identity(), attributes::getAttribute)));
	}

	public SimpleImmutableSessionAttributes(Map attributes) {
		this.attributes = Collections.unmodifiableMap(attributes);
	}

	@Override
	public Set getAttributeNames() {
		return this.attributes.keySet();
	}

	@Override
	public Object getAttribute(String name) {
		return this.attributes.get(name);
	}

	@Override
	public String toString() {
		return this.attributes.toString();
	}
}