Copyright (c) 2010, 2017 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
    Stephan Herrmann - Contribution for
							Bug 440687 - [compiler][batch][null] improve command line option for external annotations
/*******************************************************************************
 * Copyright (c) 2010, 2017 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
 *     Stephan Herrmann - Contribution for
 *								Bug 440687 - [compiler][batch][null] improve command line option for external annotations
 *******************************************************************************/
package org.eclipse.jdt.core.dom;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.batch.ClasspathDirectory;
import org.eclipse.jdt.internal.compiler.batch.FileSystem;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.problem.AbortCompilation;
import org.eclipse.jdt.internal.core.INameEnvironmentWithProgress;
import org.eclipse.jdt.internal.core.NameLookup;

Batch name environment that can be canceled using a monitor.
Since:
3.6/**
 * Batch name environment that can be canceled using a monitor.
 * @since 3.6
 */
class NameEnvironmentWithProgress extends FileSystem implements INameEnvironmentWithProgress {
	IProgressMonitor monitor;
	
	public NameEnvironmentWithProgress(Classpath[] paths, String[] initialFileNames, IProgressMonitor monitor) {
		super(paths, initialFileNames, false);
		setMonitor(monitor);
	}
	private void checkCanceled() {
		if (this.monitor != null && this.monitor.isCanceled()) {
			if (NameLookup.VERBOSE) {
				System.out.println(Thread.currentThread() + " CANCELLING LOOKUP "); //$NON-NLS-1$
			}
			throw new AbortCompilation(true/*silent*/, new OperationCanceledException());
		}
	}
	@Override
	public NameEnvironmentAnswer findType(char[] typeName, char[][] packageName, char[] moduleName) {
		return findType(typeName, packageName, true, moduleName);
	}
	@Override
	public NameEnvironmentAnswer findType(char[] typeName, char[][] packageName, boolean searchWithSecondaryTypes, char[] moduleName) {
		checkCanceled();
		NameEnvironmentAnswer answer = super.findType(typeName, packageName, moduleName);
		if (answer == null && searchWithSecondaryTypes) {
			NameEnvironmentAnswer suggestedAnswer = null;
			String qualifiedPackageName = new String(CharOperation.concatWith(packageName, '/'));
			String qualifiedTypeName = new String(CharOperation.concatWith(packageName, typeName, '/'));
			String qualifiedBinaryFileName = qualifiedTypeName + SUFFIX_STRING_class;
			for (int i = 0, length = this.classpaths.length; i < length; i++) {
				if (!(this.classpaths[i] instanceof ClasspathDirectory)) continue;
				ClasspathDirectory classpathDirectory = (ClasspathDirectory) this.classpaths[i];
				LookupStrategy strategy = LookupStrategy.get(moduleName);
				if (!strategy.matchesWithName(classpathDirectory,
						loc -> loc.getModule() != null,
						loc -> loc.servesModule(moduleName))) {
					continue;
				}
				answer = classpathDirectory.findSecondaryInClass(typeName, qualifiedPackageName, qualifiedBinaryFileName);
				if (answer != null) {
					if (!answer.ignoreIfBetter()) {
						if (answer.isBetter(suggestedAnswer))
							return answer;
					} else if (answer.isBetter(suggestedAnswer))
						// remember suggestion and keep looking
						suggestedAnswer = answer;
				}
			}
		}
		return answer;
	}

	@Override
	public NameEnvironmentAnswer findType(char[][] compoundName) {
		checkCanceled();
		return super.findType(compoundName);
	}
	@Override
	public boolean isPackage(char[][] compoundName, char[] packageName) {
		checkCanceled();
		return super.isPackage(compoundName, packageName);
	}
	
	@Override
	public void setMonitor(IProgressMonitor monitor) {
		this.monitor = monitor;
	}
}