#2459 store and restore IDE state: opened files, opened part and thei…

…r size (#2880)

* #2459 store IDE state (opened files, opened part and size) and restore IDE state

assembly/assembly-ide-war/pom.xml

@@ -341,6 +341,22 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.eclipse.che.core</groupId>
+                <artifactId>che-core-dyna-provider-generator-maven-plugin</artifactId>
+                <version>${project.version}</version>
+                <executions>
+                    <execution>
+                        <phase>generate-sources</phase>
+                        <goals>
+                            <goal>generate</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <outputDirectory>${generated.sources.directory}</outputDirectory>
+                </configuration>
+            </plugin>
             <!-- GWT Maven Plugin -->
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>

ide/che-core-dyna-provider-generator-maven-plugin/pom.xml

@@ -0,0 +1,119 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Copyright (c) 2012-2016 Codenvy, S.A.
+    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:
+      Codenvy, S.A. - initial API and implementation
+
+-->
+<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>
+        <artifactId>che-core-ide-parent</artifactId>
+        <groupId>org.eclipse.che.core</groupId>
+        <version>5.0.0-M6-SNAPSHOT</version>
+    </parent>
+    <artifactId>che-core-dyna-provider-generator-maven-plugin</artifactId>
+    <packaging>maven-plugin</packaging>
+    <name>che-core-dyna-provider-generator-maven-plugin Maven Mojo</name>
+    <url>http://maven.apache.org</url>
+    <dependencies>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.antlr</groupId>
+            <artifactId>ST4</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.che.core</groupId>
+            <artifactId>che-core-commons-gwt</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.reflections</groupId>
+            <artifactId>reflections</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.maven</groupId>
+            <artifactId>maven-artifact</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.maven</groupId>
+            <artifactId>maven-model</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.maven</groupId>
+            <artifactId>maven-plugin-api</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.maven.plugin-tools</groupId>
+            <artifactId>maven-plugin-annotations</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.sisu</groupId>
+            <artifactId>org.eclipse.sisu.plexus</artifactId>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <artifactId>jsr250-api</artifactId>
+                    <groupId>javax.annotation</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.maven</groupId>
+            <artifactId>maven-compat</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.maven.plugin-testing</groupId>
+            <artifactId>maven-plugin-testing-harness</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.plexus</groupId>
+            <artifactId>plexus-utils</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-all</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-plugin-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>mojo-descriptor</id>
+                        <goals>
+                            <goal>descriptor</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

ide/che-core-dyna-provider-generator-maven-plugin/src/main/java/org/eclipse/che/providers/ClassModel.java

@@ -0,0 +1,37 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * 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:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.providers;
+
+/**
+ * Data class for generator.
+ * Holds class name and variable name for class.
+ *
+ * @author Evgen Vidolob
+ */
+public class ClassModel {
+
+    private String name;
+
+    private String varName;
+
+    public ClassModel(Class<?> clazz) {
+        name = clazz.getName();
+        varName = clazz.getName().replaceAll("\\.", "_");
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getVarName() {
+        return varName;
+    }
+}

ide/che-core-dyna-provider-generator-maven-plugin/src/main/java/org/eclipse/che/providers/DynaProviderGenerator.java

@@ -0,0 +1,115 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * 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:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.providers;
+
+import com.google.common.io.Resources;
+
+import org.reflections.Reflections;
+import org.reflections.scanners.SubTypesScanner;
+import org.reflections.scanners.TypeAnnotationsScanner;
+import org.reflections.util.ClasspathHelper;
+import org.reflections.util.ConfigurationBuilder;
+import org.stringtemplate.v4.ST;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+/**
+ * Generate implementation for {@link DynaProvider}.
+ * Find all types annotated with {@link DynaObject} and add {@link com.google.inject.Provider} for them to {@link DynaProvider} implementation.
+ *
+ * @author Evgen Vidolob
+ */
+public class DynaProviderGenerator {
+
+    private static final String TEMPLATE_PATH =
+            "/".concat(DynaProviderGenerator.class.getPackage().getName().replace(".", "/")).concat("/DynaProvider.st");
+
+    /**
+     * String template instance used
+     */
+    private ST st;
+
+    private final String           packageName;
+    private final String           className;
+    private final List<String>     classpath;
+    private       List<ClassModel> dynaClasses;
+
+
+    public DynaProviderGenerator(String packageName, String className, List<String> classpath) {
+        this.packageName = packageName;
+        this.className = className;
+        this.classpath = classpath;
+    }
+
+    public String generate() throws IOException {
+        dynaClasses = new ArrayList<>();
+        findDynaObjects();
+
+        ST st = getTemplate();
+        st.add("packageName", packageName);
+        st.add("className", className);
+        st.add("classes", dynaClasses);
+        return st.render();
+    }
+
+    private void findDynaObjects() throws IOException {
+        ConfigurationBuilder configuration = new ConfigurationBuilder();
+
+        List<URL> urls = new ArrayList<>();
+        for (String element : classpath) {
+            urls.add(new File(element).toURI().toURL());
+        }
+
+        ClassLoader contextClassLoader = URLClassLoader.newInstance(
+                urls.toArray(new URL[urls.size()]),
+                Thread.currentThread().getContextClassLoader());
+        Thread.currentThread().setContextClassLoader(contextClassLoader);
+        configuration.setUrls(ClasspathHelper.forClassLoader(contextClassLoader));
+        configuration.setScanners(new SubTypesScanner(),
+                                  new TypeAnnotationsScanner());
+        Reflections reflection = new Reflections(configuration);
+
+        Set<Class<?>> classes = reflection.getTypesAnnotatedWith(DynaObject.class);
+        for (Class clazz : classes) {
+            //accept only classes
+            if (clazz.isEnum() || clazz.isInterface() || clazz.isAnnotation()) {
+                continue;
+            }
+            dynaClasses.add(new ClassModel(clazz));
+            System.out.println(String.format("New Dyna Object Found: %s", clazz.getCanonicalName()));
+        }
+        System.out.println(String.format("Found: %d Dyna Objects", dynaClasses.size()));
+    }
+
+    /**
+     * Get the template for provider
+     * @return the String Template
+     */
+    protected ST getTemplate() {
+        if (st == null) {
+            URL url = Resources.getResource(DynaProviderGenerator.class, TEMPLATE_PATH);
+            try {
+                st = new ST(Resources.toString(url, UTF_8));
+            } catch (IOException e) {
+                throw new IllegalArgumentException("Unable to read template", e);
+            }
+        }
+        return st;
+    }
+}

ide/che-core-dyna-provider-generator-maven-plugin/src/main/java/org/eclipse/che/providers/DynaProviderMojo.java

@@ -0,0 +1,63 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * 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:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.providers;
+
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugin.MojoFailureException;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.plugins.annotations.ResolutionScope;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.List;
+
+/**
+ * Mojo for generation implementation of DynaProvider interface.
+ *
+ * @author Evgen Vidolob
+ */
+@Mojo(name = "generate", requiresDependencyResolution = ResolutionScope.COMPILE)
+public class DynaProviderMojo extends AbstractMojo {
+    @Parameter(property = "outputDir", required = true)
+    private String outputDirectory;
+
+    @Parameter(property = "typeName", defaultValue = "org.eclipse.che.providers.DynaProviderImpl")
+    private String typeName;
+
+    @Parameter(property = "project.compileClasspathElements", required = true, readonly = true)
+    private List<String> classpath;
+
+    @Override
+    public void execute() throws MojoExecutionException, MojoFailureException {
+        File outFile = new File(outputDirectory, typeName.replace('.', File.separatorChar) + ".java");
+        String packageName = typeName.substring(0, typeName.lastIndexOf('.'));
+        String className = typeName.substring(typeName.lastIndexOf('.') + 1, typeName.length());
+
+        DynaProviderGenerator generator = new DynaProviderGenerator(packageName, className, classpath);
+
+
+        try {
+            Files.createDirectories(outFile.toPath().getParent());
+        } catch (IOException e) {
+            throw new MojoExecutionException("Can't create packages folders", e);
+        }
+        try (BufferedWriter writer = new BufferedWriter(new FileWriter(outFile))) {
+            writer.write(generator.generate());
+        } catch (IOException e) {
+            throw new MojoExecutionException("Can't write file content", e);
+        }
+    }
+}

ide/che-core-dyna-provider-generator-maven-plugin/src/main/resources/org/eclipse/che/providers/DynaProvider.st

@@ -0,0 +1,38 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * 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:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package <packageName>;
+
+import com.google.inject.Provider;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.util.Map;
+import java.util.HashMap;
+
+// File has been generated automatically by Eclipse Che Dyna provider generator plugin
+@Singleton
+@SuppressWarnings("unchecked")
+public class <className> implements org.eclipse.che.providers.DynaProvider {
+
+    private final Map\<String, Provider\<?>> providers = new HashMap\<>();
+
+    @Override
+    public \<T> Provider\<T> getProvider(String className) {
+        return (Provider\<T>)providers.get(className);
+    }
+
+    @Inject
+    public <className>(<if(!classes.empty)>
+        <classes: {clazz | Provider\<<clazz.name>> <clazz.varName>};  separator=",\n"><endif>) {
+
+       <classes : {clazz | providers.put("<clazz.name>", <clazz.varName>);}; separator="\n">
+    }
+
+}