Copyright (c) 2000, 2009 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
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2009 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
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.env;

import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.core.compiler.IProblem;

public class AccessRule {

	public static final int IgnoreIfBetter = 0x02000000; // value must be greater than IProblem#ForbiddenReference and DiscouragedReference

	public char[] pattern;
	public int problemId;

	public AccessRule(char[] pattern, int problemId) {
		this(pattern, problemId, false);
	}

	public AccessRule(char[] pattern, int problemId, boolean keepLooking) {
		this.pattern = pattern;
		this.problemId = keepLooking ? problemId | IgnoreIfBetter : problemId;
	}

	@Override
	public int hashCode() {
		return this.problemId * 17 + CharOperation.hashCode(this.pattern);
	}

	@Override
	public boolean equals(Object obj) {
		if (!(obj instanceof AccessRule)) return false;
		AccessRule other = (AccessRule) obj;
		if (this.problemId != other.problemId) return false;
		return CharOperation.equals(this.pattern, other.pattern);
	}

	public int getProblemId() {
		return this.problemId & ~IgnoreIfBetter;
	}

	public boolean ignoreIfBetter() {
		return (this.problemId & IgnoreIfBetter) != 0;
	}

	@Override
	public String toString() {
		StringBuffer buffer = new StringBuffer();
		buffer.append("pattern="); //$NON-NLS-1$
		buffer.append(this.pattern);
		switch (getProblemId()) {
			case IProblem.ForbiddenReference:
				buffer.append(" (NON ACCESSIBLE"); //$NON-NLS-1$
				break;
			case IProblem.DiscouragedReference:
				buffer.append(" (DISCOURAGED"); //$NON-NLS-1$
				break;
			default:
				buffer.append(" (ACCESSIBLE"); //$NON-NLS-1$
				break;
		}
		if (ignoreIfBetter())
			buffer.append(" | IGNORE IF BETTER"); //$NON-NLS-1$
		buffer.append(')');
		return buffer.toString();
	}
}