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

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaModelStatus;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.internal.core.builder.JavaBuilder;

/*
 * Validates the raw classpath format and the resolved classpath of this project,
 * updating markers if necessary.
 */
public class ClasspathValidation {

	private JavaProject project;

	public ClasspathValidation(JavaProject project) {
		this.project = project;
	}

	public void validate() {
		JavaModelManager.PerProjectInfo perProjectInfo;
		try {
			perProjectInfo = this.project.getPerProjectInfo();
		} catch (JavaModelException e) {
			// project doesn't exist
			IProject resource = this.project.getProject();
			if (resource.isAccessible()) {
				this.project.flushClasspathProblemMarkers(true/*flush cycle markers*/, true/*flush classpath format markers*/, true /*flush overlapping output markers*/);

				// remove problems and tasks created  by the builder
				JavaBuilder.removeProblemsAndTasksFor(resource);
			}
			return;
		}

		// use synchronized block to ensure consistency
		IClasspathEntry[] rawClasspath;
		IPath outputLocation;
		IJavaModelStatus status;
		synchronized (perProjectInfo) {
			rawClasspath = perProjectInfo.rawClasspath;
			outputLocation = perProjectInfo.outputLocation;
			status = perProjectInfo.rawClasspathStatus; // status has been set during POST_CHANGE
		}

		// update classpath format problems
		this.project.flushClasspathProblemMarkers(false/*cycle*/, true/*format*/, false/*overlapping*/);
		if (!status.isOK())
			this.project.createClasspathProblemMarker(status);

		// update overlapping output problem markers 
		this.project.flushClasspathProblemMarkers(false/*cycle*/, false/*format*/, true/*overlapping*/);
		
		// update resolved classpath problems
		this.project.flushClasspathProblemMarkers(false/*cycle*/, false/*format*/, false/*overlapping*/);

		if (rawClasspath != JavaProject.INVALID_CLASSPATH && outputLocation != null) {
		 	for (int i = 0; i < rawClasspath.length; i++) {
				status = ClasspathEntry.validateClasspathEntry(this.project, rawClasspath[i], false/*src attach*/, false /*not referred by a container*/);
				if (!status.isOK()) {
					this.project.createClasspathProblemMarker(status);
				}
			 }
			status = ClasspathEntry.validateClasspath(this.project, rawClasspath, outputLocation);
			if (status.getCode() != IStatus.OK)
				this.project.createClasspathProblemMarker(status);
		 }
	}

}