1 files changed, 174 insertions, 0 deletions
diff --git a/build/org.eclipse.cdt.build.core/src/org/eclipse/cdt/build/core/internal/ScannerInfoData.java b/build/org.eclipse.cdt.build.core/src/org/eclipse/cdt/build/core/internal/ScannerInfoData.java
new file mode 100644
index 00000000000..a1599081eaf
--- /dev/null
+++ b/build/org.eclipse.cdt.build.core/src/org/eclipse/cdt/build/core/internal/ScannerInfoData.java
@@ -0,0 +1,174 @@
+/*******************************************************************************
+ * Copyright (c) 2015 QNX Software Systems and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *******************************************************************************/
+package org.eclipse.cdt.build.core.internal;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.Reader;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.eclipse.cdt.build.core.CBuildConfiguration;
+import org.eclipse.cdt.core.CCorePlugin;
+import org.eclipse.cdt.core.model.ILanguage;
+import org.eclipse.cdt.core.model.LanguageManager;
+import org.eclipse.cdt.core.parser.IExtendedScannerInfo;
+import org.eclipse.cdt.core.parser.IScannerInfo;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.runtime.IPath;
+import org.eclipse.core.runtime.content.IContentType;
+
+import com.google.gson.Gson;
+
+/**
+ * Class representing scanner info data for a project as stored in the metadata
+ * area.
+ */
+public class ScannerInfoData {
+
+	private Set<ToolChainScannerInfo> perResourceInfo;
+	private Map<String, ToolChainScannerInfo> perLanguageInfo;
+
+	private transient Path savePath;
+	private transient Map<ToolChainScannerInfo, ToolChainScannerInfo> infoCache;
+	private transient Map<String, ToolChainScannerInfo> resourceCache;
+
+	public void createCache() {
+		infoCache = new HashMap<>();
+		resourceCache = new HashMap<>();
+		if (perResourceInfo != null) {
+			for (ToolChainScannerInfo info : perResourceInfo) {
+				infoCache.put(info, info);
+				for (String path : info.getResourcePaths()) {
+					resourceCache.put(path, info);
+				}
+			}
+		}
+	}
+
+	private boolean perResource() {
+		return perResourceInfo != null && !perResourceInfo.isEmpty();
+	}
+
+	private boolean perLanguage() {
+		return perLanguageInfo != null && !perLanguageInfo.isEmpty();
+	}
+
+	public IScannerInfo getScannerInfo(IResource resource) {
+		if (perResource()) {
+			ToolChainScannerInfo info = resourceCache.get(resource.getFullPath().toString());
+			if (info != null) {
+				return info.getScannerInfo();
+			}
+		}
+
+		// Else try language
+		if (perLanguage()) {
+			IProject project = resource.getProject();
+			IContentType contentType = CCorePlugin.getContentType(project, resource.getName());
+			if (contentType != null) {
+				ILanguage language = LanguageManager.getInstance().getLanguage(contentType, project);
+				ToolChainScannerInfo info = perLanguageInfo.get(language.getId());
+				if (info != null) {
+					return info.getScannerInfo();
+				}
+			}
+		}
+
+		return null;
+	}
+
+	public IScannerInfo getScannerInfo(ILanguage language) {
+		if (perLanguage()) {
+			ToolChainScannerInfo info = perLanguageInfo.get(language.getId());
+			if (info != null) {
+				return info.getScannerInfo();
+			}
+		}
+		return null;
+	}
+
+	public void putScannerInfo(IResource resource, ToolChainScannerInfo info) {
+		if (perResourceInfo == null) {
+			perResourceInfo = new HashSet<>();
+			infoCache = new HashMap<>();
+			infoCache.put(info, info);
+		} else {
+			ToolChainScannerInfo existing = infoCache.get(info);
+			if (existing != null) {
+				info = existing;
+			} else {
+				perResourceInfo.add(info);
+				infoCache.put(info, info);
+			}
+		}
+
+		info.addResource(resource);
+		resourceCache.put(resource.getFullPath().toString(), info);
+		queueSave();
+	}
+
+	public void putScannerInfo(ILanguage language, IExtendedScannerInfo info) {
+		if (perLanguageInfo == null) {
+			perLanguageInfo = new HashMap<>();
+		}
+		perLanguageInfo.put(language.getId(), new ToolChainScannerInfo(info));
+		queueSave();
+	}
+
+	public static ScannerInfoData load(CBuildConfiguration config) {
+		IPath stateLoc = Activator.getDefault().getStateLocation();
+		IPath scannerInfoPath = stateLoc.append(config.getProject().getName()).append(config.getName() + ".scInfo"); //$NON-NLS-1$
+		File scannerInfoFile = scannerInfoPath.toFile();
+		ScannerInfoData info = null;
+		if (scannerInfoFile.canRead()) {
+			try (Reader reader = new FileReader(scannerInfoFile)) {
+				info = new Gson().fromJson(reader, ScannerInfoData.class);
+			} catch (Exception e) {
+				CCorePlugin.log(e);
+			}
+		}
+
+		if (info == null) {
+			info = new ScannerInfoData();
+		}
+
+		info.savePath = scannerInfoFile.toPath();
+		info.createCache();
+		return info;
+	}
+
+	public void save() {
+		try {
+			String json = new Gson().toJson(this);
+			Files.createDirectories(savePath.getParent());
+			Files.write(savePath, json.getBytes(StandardCharsets.UTF_8));
+		} catch (IOException e) {
+			CCorePlugin.log(e);
+		}
+	}
+
+	public void queueSave() {
+		ScannerInfoSaveParticipant.getInstance().save(this);
+	}
+
+	public void clear() {
+		perLanguageInfo = null;
+		perResourceInfo = null;
+		createCache();
+		queueSave();
+	}
+
+}