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/*******************************************************************************
 * Copyright (c) 2004, 2011 QNX Software Systems 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:
 *     QNX Software Systems - initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.make.internal.core.scannerconfig;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import org.eclipse.cdt.core.model.CoreModel;
import org.eclipse.cdt.core.model.IPathEntry;
import org.eclipse.cdt.core.model.IPathEntryContainer;
import org.eclipse.cdt.make.core.MakeCorePlugin;
import org.eclipse.cdt.make.core.scannerconfig.IDiscoveredPathManager.IDiscoveredPathInfo;
import org.eclipse.cdt.make.internal.core.MakeMessages;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;

public class DiscoveredPathContainer implements IPathEntryContainer {
	public static final IPath CONTAINER_ID = new Path("org.eclipse.cdt.make.core.DISCOVERED_SCANNER_INFO"); //$NON-NLS-1$

	protected final IProject fProject;
	private IPathEntry[] fPathEntries;

	public DiscoveredPathContainer(IProject project) {
		fProject = project;
		fPathEntries = null;
	}

	//    public IPathEntry[] getPathEntries() {
	//        IPathEntry[] fPathEntries;
	//        try {
	//            fPathEntries = getPathEntries(getPathEntryMap());
	//        } catch (CoreException e) {
	//            MakeCorePlugin.log(e);
	//            return new IPathEntry[0];
	//        }
	//        return fPathEntries;
	//    }

	@Override
	public String getDescription() {
		return MakeMessages.getString("DiscoveredContainer.description"); //$NON-NLS-1$
	}

	@Override
	public IPath getPath() {
		return CONTAINER_ID;
	}

	@Override
	public IPathEntry[] getPathEntries() {
		if (fPathEntries == null) {
			try {
				fPathEntries = computeNewPathEntries();
			} catch (CoreException e) {
				MakeCorePlugin.log(e);
				return new IPathEntry[0];
			}
		}
		return fPathEntries;
	}

	private IPathEntry[] computeNewPathEntries() throws CoreException {
		IDiscoveredPathInfo info = MakeCorePlugin.getDefault().getDiscoveryManager().getDiscoveredInfo(fProject);
		IPath[] includes = info.getIncludePaths();
		Map<String, String> syms = info.getSymbols();
		List<IPathEntry> entries = new ArrayList<>(includes.length + syms.size());
		for (IPath inc : includes) {
			entries.add(CoreModel.newIncludeEntry(Path.EMPTY, Path.EMPTY, inc, true));
		}
		Set<Entry<String, String>> entrySet = syms.entrySet();
		for (Entry<String, String> entry : entrySet) {
			entries.add(CoreModel.newMacroEntry(Path.EMPTY, entry.getKey(), entry.getValue()));
		}
		return entries.toArray(new IPathEntry[entries.size()]);
	}

}

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