org.eclipse.equinox.log.LogPermissionCollection Maven / Gradle / Ivy

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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/*******************************************************************************
 * Copyright (c) 2009, 2011 IBM Corporation and others
 *
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0 which
 * accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 ******************************************************************************/
package org.eclipse.equinox.log;

import java.security.Permission;
import java.security.PermissionCollection;
import java.util.Collections;
import java.util.Enumeration;

/**
 * Stores a set of LogPermission permissions.
 *
 * @ThreadSafe
 * @see java.security.Permission
 * @see java.security.Permissions
 * @see java.security.PermissionCollection
 * @since 3.7
 */
public final class LogPermissionCollection extends PermissionCollection {
	private static final long serialVersionUID = -1955409691185916778L;
	LogPermission logPermission;

	@Override
	public void add(Permission permission) {
		if (!(permission instanceof LogPermission))
			throw new IllegalArgumentException("invalid permission: " + permission); //$NON-NLS-1$
		if (isReadOnly())
			throw new SecurityException("attempt to add a LogPermission to a readonly LogPermissionCollection"); //$NON-NLS-1$
		if (permission != null)
			logPermission = (LogPermission) permission;
	}

	@Override
	public Enumeration elements() {
		return logPermission != null ? Collections.enumeration(Collections.singleton(logPermission)) : Collections.emptyEnumeration();
	}

	@Override
	public boolean implies(Permission permission) {
		return logPermission != null && logPermission.implies(permission);
	}

}