implemented simple content-assist contributor for JDT that connects t…

…o an LS

eclipse-language-servers/org.springframework.boot.ide.java.servers.feature/build.properties

@@ -0,0 +1 @@
+bin.includes = feature.xml

eclipse-language-servers/org.springframework.boot.ide.java.servers.feature/feature.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<feature
+	id="org.springframework.boot.ide.java.servers.feature"
+	label="Spring Boot IDE Java Editing Language Server Feature"
+	version="4.0.0.qualifier"
+	provider-name="Pivotal, Inc.">
+
+	<requires>
+		<import plugin="org.eclipse.ui.genericeditor"/>
+		<import plugin="org.eclipse.lsp4e"/>
+	</requires>
+
+	<plugin
+		id="org.springframework.boot.ide.java.servers"
+		download-size="0"
+		install-size="0"
+		version="0.0.0"
+		unpack="false">
+	</plugin>
+
+</feature>

eclipse-language-servers/org.springframework.boot.ide.java.servers.feature/pom.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot.ide</groupId>
+		<artifactId>org.springframework.boot.ide.servers</artifactId>
+		<version>4.0.0-SNAPSHOT</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+
+	<artifactId>org.springframework.boot.ide.java.servers.feature</artifactId>
+	<packaging>eclipse-feature</packaging>
+
+</project>

eclipse-language-servers/org.springframework.boot.ide.java.servers/.classpath

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

eclipse-language-servers/org.springframework.boot.ide.java.servers/.project

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.springframework.boot.ide.java.servers</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

eclipse-language-servers/org.springframework.boot.ide.java.servers/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,7 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8

eclipse-language-servers/org.springframework.boot.ide.java.servers/META-INF/MANIFEST.MF

@@ -0,0 +1,21 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Servers
+Bundle-SymbolicName: org.springframework.boot.ide.java.servers;singleton:=true
+Bundle-Version: 4.0.0.qualifier
+Bundle-RequiredExecutionEnvironment: JavaSE-1.8
+Require-Bundle: org.eclipse.jdt.launching;bundle-version="3.9.0",
+ org.eclipse.core.runtime;bundle-version="3.12.0",
+ org.eclipse.lsp4e;bundle-version="0.1.0",
+ org.eclipse.ui.genericeditor;bundle-version="1.0.0",
+ org.eclipse.jface.text;bundle-version="3.11.100",
+ org.eclipse.jdt.ui;bundle-version="3.13.0",
+ org.eclipse.lsp4j,
+ org.eclipse.ui.workbench,
+ org.eclipse.jface,
+ org.eclipse.xtext.xbase.lib
+Import-Package: com.google.gson;version="2.7.0",
+ org.eclipse.jface.preference,
+ org.eclipse.lsp4j.jsonrpc.messages;version="0.1.0.v20170117-0759",
+ org.eclipse.lsp4j.services;version="0.1.0.v20170117-0759",
+ org.osgi.framework

eclipse-language-servers/org.springframework.boot.ide.java.servers/build.properties

@@ -0,0 +1,6 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .,\
+               plugin.xml,\
+               servers/

eclipse-language-servers/org.springframework.boot.ide.java.servers/plugin.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?eclipse version="3.4"?>
+<plugin>
+
+   <extension
+         point="org.eclipse.lsp4e.languageServer">
+      <server
+            class="org.springframework.boot.ide.java.servers.SpringBootJavaLanguageServer"
+            id="org.eclipse.languageserver.languages.springbootjava"
+            label="Spring Boot Java Language Server">
+      </server>
+      <contentTypeMapping
+            contentType="org.eclipse.jdt.core.javaSource"
+            id="org.eclipse.languageserver.languages.springbootjava">
+      </contentTypeMapping>
+   </extension>
+
+   <extension
+         id="springbootjava-completion-computer"
+         point="org.eclipse.jdt.ui.javaCompletionProposalComputer">
+      <javaCompletionProposalComputer
+            activate="true"
+            categoryId="org.eclipse.jdt.ui.defaultProposalCategory"
+            class="org.springframework.boot.ide.java.servers.SpringBootJavaCompletionProposalComputer"
+            needsSortingAfterFiltering="false">
+      </javaCompletionProposalComputer>
+   </extension>
+
+</plugin>

eclipse-language-servers/org.springframework.boot.ide.java.servers/pom.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot.ide</groupId>
+		<artifactId>org.springframework.boot.ide.servers</artifactId>
+		<version>4.0.0-SNAPSHOT</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+
+	<artifactId>org.springframework.boot.ide.java.servers</artifactId>
+	<packaging>eclipse-plugin</packaging>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.ide.vscode</groupId>
+			<artifactId>vscode-boot-java</artifactId>
+			<version>0.0.1-SNAPSHOT</version>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-dependency-plugin</artifactId>
+				<version>2.10</version>
+				<executions>
+					<execution>
+						<id>copy</id>
+						<phase>prepare-package</phase>
+						<goals>
+							<goal>copy</goal>
+						</goals>
+						<configuration>
+							<artifactItems>
+								<artifactItem>
+									<groupId>org.springframework.ide.vscode</groupId>
+									<artifactId>vscode-boot-java</artifactId>
+									<overWrite>true</overWrite>
+									<outputDirectory>${project.build.directory}/../servers</outputDirectory>
+								</artifactItem>
+							</artifactItems>
+							<overWriteReleases>true</overWriteReleases>
+							<overWriteSnapshots>true</overWriteSnapshots>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

eclipse-language-servers/org.springframework.boot.ide.java.servers/src/org/springframework/boot/ide/java/servers/Constants.java

@@ -0,0 +1,20 @@
+/*******************************************************************************
+ * Copyright (c) 2017 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.boot.ide.java.servers;
+
+/**
+ * @author Martin Lippert
+ */
+public class Constants {
+
+	public static final String PLUGIN_ID = "org.springframework.boot.ide.java.servers";
+
+}

eclipse-language-servers/org.springframework.boot.ide.java.servers/src/org/springframework/boot/ide/java/servers/SpringBootJavaCompletionProposalComputer.java

@@ -0,0 +1,64 @@
+/*******************************************************************************
+ * Copyright (c) 2017 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.boot.ide.java.servers;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.jdt.ui.text.java.ContentAssistInvocationContext;
+import org.eclipse.jdt.ui.text.java.IJavaCompletionProposalComputer;
+import org.eclipse.jface.text.contentassist.ICompletionProposal;
+import org.eclipse.jface.text.contentassist.IContextInformation;
+import org.eclipse.lsp4e.operations.completion.LSContentAssistProcessor;
+
+/**
+ * @author Martin Lippert
+ */
+@SuppressWarnings("restriction")
+public class SpringBootJavaCompletionProposalComputer implements IJavaCompletionProposalComputer {
+
+	private LSContentAssistProcessor lsContentAssistProcessor;
+
+	public SpringBootJavaCompletionProposalComputer() {
+		lsContentAssistProcessor = new LSContentAssistProcessor();
+	}
+
+	@Override
+	public void sessionStarted() {
+	}
+
+	@Override
+	public List<ICompletionProposal> computeCompletionProposals(ContentAssistInvocationContext context,
+			IProgressMonitor monitor) {
+		System.out.println("Spring Boot Java Completion Proposal - compute completion proposals");
+
+		ICompletionProposal[] proposals = lsContentAssistProcessor.computeCompletionProposals(context.getViewer(), context.getInvocationOffset());
+		return Arrays.asList(proposals);
+	}
+
+	@Override
+	public List<IContextInformation> computeContextInformation(ContentAssistInvocationContext context,
+			IProgressMonitor monitor) {
+		IContextInformation[] contextInformation = lsContentAssistProcessor.computeContextInformation(context.getViewer(), context.getInvocationOffset());
+		return Arrays.asList(contextInformation);
+	}
+
+	@Override
+	public String getErrorMessage() {
+		return lsContentAssistProcessor.getErrorMessage();
+	}
+
+	@Override
+	public void sessionEnded() {
+	}
+
+}