More code moved from jdt.ls.extension to jdt.ls.commons

jdt.ls extension reduced to a simple wrapper that forwards requests
to commons implementation.

eclipse-language-servers/org.springframework.tooling.ls.eclipse.commons/src/org/springframework/tooling/ls/eclipse/commons/ClasspathListenerParams.java

@@ -0,0 +1,35 @@
+/*******************************************************************************
+ * Copyright (c) 2018 Pivotal, Inc.
+ * 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
+ *
+ * Contributors:
+ *     Pivotal, Inc. - initial API and implementation
+ *******************************************************************************/
+package org.springframework.tooling.ls.eclipse.commons;
+
+public class ClasspathListenerParams {
+
+	private String callbackCommandId;
+
+	public ClasspathListenerParams(String callbackCommandId) {
+		super();
+		this.callbackCommandId = callbackCommandId;
+	}
+
+	public String getCallbackCommandId() {
+		return callbackCommandId;
+	}
+
+	public void setCallbackCommandId(String callbackCommandId) {
+		this.callbackCommandId = callbackCommandId;
+	}
+
+	@Override
+	public String toString() {
+		return "ClasspathListenerParams [callbackCommandId=" + callbackCommandId + "]";
+	}
+
+}

eclipse-language-servers/org.springframework.tooling.ls.eclipse.commons/src/org/springframework/tooling/ls/eclipse/commons/STS4LanguageClient.java

@@ -10,7 +10,10 @@
  *******************************************************************************/
 package org.springframework.tooling.ls.eclipse.commons;
 
+import java.util.concurrent.CompletableFuture;
+
 import org.eclipse.lsp4j.jsonrpc.services.JsonNotification;
+import org.eclipse.lsp4j.jsonrpc.services.JsonRequest;
 import org.eclipse.lsp4j.services.LanguageClient;
 
 /**
@@ -29,4 +32,10 @@ public interface STS4LanguageClient extends LanguageClient {
 // TODO: @JsonRequest("sts/moveCursor")
 //	CompletableFuture<Object> moveCursor(CursorMovement cursorMovement);
 
+	@JsonRequest("sts/addClasspathListener")
+	CompletableFuture<Object> addClasspathListener(ClasspathListenerParams params);
+
+	@JsonRequest("sts/removeClasspathListener")
+	CompletableFuture<Object> removeClasspathListener(ClasspathListenerParams classpathListenerParams);
+	
 }

eclipse-language-servers/org.springframework.tooling.ls.eclipse.commons/src/org/springframework/tooling/ls/eclipse/commons/STS4LanguageClientImpl.java

@@ -16,6 +16,7 @@ import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.CompletableFuture;
 
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
@@ -42,6 +43,7 @@ import org.eclipse.ui.texteditor.AbstractTextEditor;
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.util.concurrent.Futures;
 
 @SuppressWarnings("restriction")
 public class STS4LanguageClientImpl extends LanguageClientImpl implements STS4LanguageClient {
@@ -174,5 +176,17 @@ public class STS4LanguageClientImpl extends LanguageClientImpl implements STS4La
 			return null;
 		}
 	}
+
+	@Override
+	public CompletableFuture<Object> addClasspathListener(ClasspathListenerParams params) {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+	@Override
+	public CompletableFuture<Object> removeClasspathListener(ClasspathListenerParams classpathListenerParams) {
+		// TODO Auto-generated method stub
+		return null;
+	}
 	
 }