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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) 2014, 2015 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:
 *     Gauthier JACQUES - initial API and implementation
 *******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.compiler.tool;

import java.io.File;
import java.util.Locale;

import javax.tools.Diagnostic;
import javax.tools.JavaFileObject;

import org.aspectj.org.eclipse.jdt.core.compiler.CategorizedProblem;
import org.aspectj.org.eclipse.jdt.internal.compiler.problem.DefaultProblem;
import org.aspectj.org.eclipse.jdt.internal.compiler.problem.DefaultProblemFactory;

public class EclipseDiagnostic implements Diagnostic {

    private final Kind kind;
    private final int problemId;
    private final String[] problemArguments;
    private final char[] originatingFileName;
    private final int lineNumber;
    private final int columnNumber;
    private final int startPosition;
    private final int endPosition;
    private final DefaultProblemFactory problemFactory;

    private EclipseDiagnostic(Kind kind,
                              int problemId,
                              String[] problemArguments,
                              char[] originatingFileName,
                              DefaultProblemFactory problemFactory,
                              int lineNumber,
                              int columnNumber,
                              int startPosition,
                              int endPosition) {
        this.kind = kind;
        this.problemId = problemId;
        this.problemArguments = problemArguments;
        this.originatingFileName = originatingFileName;
        this.problemFactory = problemFactory;
        this.lineNumber = lineNumber;
        this.columnNumber = columnNumber;
        this.startPosition = startPosition;
        this.endPosition = endPosition;
    }

    private EclipseDiagnostic(Kind kind,
                              int problemId,
                              String[] problemArguments,
                              char[] originatingFileName,
                              DefaultProblemFactory problemFactory) {
        this(kind, problemId, problemArguments, originatingFileName, problemFactory, (int)Diagnostic.NOPOS, (int)Diagnostic.NOPOS, (int)Diagnostic.NOPOS, (int)Diagnostic.NOPOS);
    }

    public static EclipseDiagnostic newInstance(CategorizedProblem problem, DefaultProblemFactory factory) {
        if(problem instanceof DefaultProblem) return newInstanceFromDefaultProblem((DefaultProblem) problem, factory);
        return new EclipseDiagnostic(getKind(problem),
              problem.getID(),
              problem.getArguments(),
              problem.getOriginatingFileName(),
              factory);
    }

    private static EclipseDiagnostic newInstanceFromDefaultProblem(DefaultProblem problem, DefaultProblemFactory factory) {
        return new EclipseDiagnostic(getKind(problem),
              problem.getID(),
              problem.getArguments(),
              problem.getOriginatingFileName(),
              factory,
              problem.getSourceLineNumber(),
              problem.getSourceColumnNumber(),
              problem.getSourceStart(),
              problem.getSourceEnd()
        );
    }

    private static Kind getKind(CategorizedProblem problem) {
        Kind kind = Kind.OTHER;
        if(problem.isError()) {
            kind = Kind.ERROR;
        } else if(problem.isWarning()) {
            kind = Kind.WARNING;
        } else if (problem instanceof DefaultProblem && ((DefaultProblem) problem).isInfo()) {
        	kind = Kind.NOTE;
        }
        return kind;
    }

    @Override
    public Kind getKind() {
        return this.kind;
    }

    @Override
    public EclipseFileObject getSource() {
        File f = new File(new String(this.originatingFileName));
        if (f.exists()) {
            return new EclipseFileObject(null, f.toURI(), JavaFileObject.Kind.SOURCE, null);
        }
        return null;
    }

    @Override
    public long getPosition() {
        return this.startPosition;  //To change body of implemented methods use File | Settings | File Templates.
    }

    @Override
    public long getStartPosition() {
        return this.startPosition;
    }

    @Override
    public long getEndPosition() {
        return this.endPosition;
    }

    @Override
    public long getLineNumber() {
        return this.lineNumber;
    }

    @Override
    public long getColumnNumber() {
        return this.columnNumber;
    }

    @Override
    public String getCode() {
        return Integer.toString(this.problemId);
    }

    @Override
    public String getMessage(Locale locale) {
        if (locale != null) {
        	this.problemFactory.setLocale(locale);
        }
        return this.problemFactory.getLocalizedMessage(this.problemId, this.problemArguments);
    }
}