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.problem;

import org.eclipse.jdt.core.compiler.CategorizedProblem;
import org.eclipse.jdt.internal.compiler.CompilationResult;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.lookup.InvocationSite;
import org.eclipse.jdt.internal.compiler.util.Util;

/*
 * Special unchecked exception type used
 * to abort from the compilation process
 *
 * should only be thrown from within problem handlers.
 */
public class AbortCompilation extends RuntimeException {

	public CompilationResult compilationResult;
	public Throwable exception;
	public CategorizedProblem problem;

	/* special fields used to abort silently (e.g. when canceling build process) */
	public boolean isSilent;
	public RuntimeException silentException;

	private static final long serialVersionUID = -2047226595083244852L; // backward compatible

	public AbortCompilation() {
		// empty
	}

	public AbortCompilation(CompilationResult compilationResult, CategorizedProblem problem) {
		this();
		this.compilationResult = compilationResult;
		this.problem = problem;
	}

	public AbortCompilation(CompilationResult compilationResult, Throwable exception) {
		this();
		this.compilationResult = compilationResult;
		this.exception = exception;
	}

	public AbortCompilation(boolean isSilent, RuntimeException silentException) {
		this();
		this.isSilent = isSilent;
		this.silentException = silentException;
	}
	@Override
	public String getMessage() {
		String message = super.getMessage();
		StringBuffer buffer = new StringBuffer(message == null ? Util.EMPTY_STRING : message);
		if (this.problem != null) {
			buffer.append(this.problem);
		} else if (this.exception != null) {
			message = this.exception.getMessage();
			buffer.append(message == null ? Util.EMPTY_STRING : message);
		} else if (this.silentException != null) {
			message = this.silentException.getMessage();
			buffer.append(message == null ? Util.EMPTY_STRING : message);
		}
		return String.valueOf(buffer);
	}
	public void updateContext(InvocationSite invocationSite, CompilationResult unitResult) {
		if (this.problem == null) return;
		if (this.problem.getSourceStart() != 0 || this.problem.getSourceEnd() != 0) return;
		this.problem.setSourceStart(invocationSite.sourceStart());
		this.problem.setSourceEnd(invocationSite.sourceEnd());
		int[] lineEnds = unitResult.getLineSeparatorPositions();
		this.problem.setSourceLineNumber(Util.getLineNumber(invocationSite.sourceStart(), lineEnds, 0, lineEnds.length-1));
		this.compilationResult = unitResult;
	}

	public void updateContext(ASTNode astNode, CompilationResult unitResult) {
		if (this.problem == null) return;
		if (this.problem.getSourceStart() != 0 || this.problem.getSourceEnd() != 0) return;
		this.problem.setSourceStart(astNode.sourceStart());
		this.problem.setSourceEnd(astNode.sourceEnd());
		int[] lineEnds = unitResult.getLineSeparatorPositions();
		this.problem.setSourceLineNumber(Util.getLineNumber(astNode.sourceStart(), lineEnds, 0, lineEnds.length-1));
		this.compilationResult = unitResult;
	}

	public String getKey() {
		StringBuffer buffer = new StringBuffer();
		if (this.problem != null) {
			buffer.append(this.problem);
		}
		return String.valueOf(buffer);
	}
}