Merge pull request #132 from xtext/cd_issue108_issue131

[#108][#131] ship custom IWorkspaceConfig to be compatible with multiple Xtext versions

Author: oehme

xtext-gradle-builder/src/main/java/org/xtext/gradle/builder/GradleProjectConfig.xtend

@@ -7,7 +7,6 @@ import org.eclipse.xtext.util.UriUtil
 import org.eclipse.xtext.workspace.IProjectConfig
 import org.eclipse.xtext.workspace.ISourceFolder
 import org.xtext.gradle.protocol.GradleBuildRequest
-import org.eclipse.xtext.workspace.SingleProjectWorkspaceConfig
 
 @FinalFieldsConstructor
 class GradleProjectConfig implements IProjectConfig {
@@ -34,7 +33,7 @@ class GradleProjectConfig implements IProjectConfig {
 	}
 
 	override getWorkspaceConfig() {
-		new SingleProjectWorkspaceConfig(this)
+		new GradleWorkspaceConfig(this)
 	}
 
 }

xtext-gradle-builder/src/main/java/org/xtext/gradle/builder/GradleWorkspaceConfig.xtend

@@ -0,0 +1,39 @@
+/*******************************************************************************
+ * Copyright (c) 2018 itemis AG (http://www.itemis.eu) 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.xtext.gradle.builder
+
+
+import org.eclipse.emf.common.util.URI
+import org.eclipse.xtend.lib.annotations.Data
+import org.eclipse.xtext.workspace.IProjectConfig
+import org.eclipse.xtext.workspace.IWorkspaceConfig
+import static extension org.eclipse.xtext.util.UriUtil.*
+
+/**
+ * @author dietrich - Initial contribution and API
+ */
+@Data
+class GradleWorkspaceConfig implements IWorkspaceConfig {
+	
+	IProjectConfig projectConfig
+	
+	override findProjectByName(String name) {
+		if (projectConfig.name == name)
+			return projectConfig
+	}
+	
+	override findProjectContaining(URI member) {
+		if (projectConfig.path.isPrefixOf(member))
+			return projectConfig
+	}
+	
+	override getProjects() {
+		return #{projectConfig}
+	}
+	
+}