/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.zeppelin.groovy;
import java.io.StringWriter;
import org.slf4j.Logger;
import java.util.Properties;
import java.util.Collection;
import java.util.Map;
import java.util.List;
import java.util.LinkedList;
import groovy.xml.MarkupBuilder;
import groovy.lang.Closure;
import org.apache.zeppelin.interpreter.InterpreterContext;
import org.apache.zeppelin.interpreter.InterpreterContextRunner;
import org.apache.zeppelin.display.AngularObjectRegistry;
import org.apache.zeppelin.display.AngularObject;
import org.apache.zeppelin.display.GUI;
import org.apache.zeppelin.display.ui.OptionInput.ParamOption;
import org.apache.zeppelin.annotation.ZeppelinApi;
import org.apache.zeppelin.interpreter.RemoteWorksController;
import org.apache.zeppelin.interpreter.InterpreterException;
/**
* Groovy interpreter for Zeppelin.
*/
public class GObject extends groovy.lang.GroovyObjectSupport {
Logger log;
StringWriter out;
Properties props;
InterpreterContext interpreterContext;
Map<String, Object> bindings;
public GObject(Logger log, StringWriter out, Properties p, InterpreterContext ctx,
Map<String, Object> bindings) {
this.log = log;
this.out = out;
this.interpreterContext = ctx;
this.props = p;
this.bindings = bindings;
}
public Object getProperty(String key) {
if ("log".equals(key)) {
return log;
}
return props.getProperty(key);
}
public void setProperty(String key, Object value) {
throw new RuntimeException("Set properties not supported: " + key + "=" + value);
}
public Properties getProperties() {
return props;
}
private void startOutputType(String type) {
StringBuffer sb = out.getBuffer();
if (sb.length() > 0) {
if (sb.length() < type.length() || !type.equals(sb.substring(0, type.length()))) {
log.error("try to start output `" + type + "` after non-" + type + " started");
}
} else {
out.append(type);
out.append('\n');
}
}
/**
* returns gui object
*/
public GUI getGui() {
return interpreterContext.getGui();
}
@ZeppelinApi
public Object input(String name) {
return input(name, "");
}
@ZeppelinApi
public Object input(String name, Object defaultValue) {
return getGui().input(name, defaultValue);
}
private ParamOption[] toParamOptions(Map<Object, String> options) {
ParamOption[] paramOptions = new ParamOption[options.size()];
int i = 0;
for (Map.Entry<Object, String> e : options.entrySet()) {
paramOptions[i++] = new ParamOption(e.getKey(), e.getValue());
}
return paramOptions;
}
@ZeppelinApi
public Object select(String name, Map<Object, String> options) {
return select(name, "", options);
}
@ZeppelinApi
public Object select(String name, Object defaultValue, Map<Object, String> options) {
return getGui().select(name, defaultValue, toParamOptions(options));
}
@ZeppelinApi
public Collection<Object> checkbox(String name, Map<Object, String> options) {
return checkbox(name, options.keySet(), options);
}
@ZeppelinApi
public Collection<Object> checkbox(String name, Collection<Object> defaultChecked,
Map<Object, String> options) {
return getGui().checkbox(name, defaultChecked, toParamOptions(options));
}
/**
* Returns shared variable if it was previously set. The same as getting groovy script variables
* but this method will return null if script variable not assigned. To understand groovy script
* variables see groovy.transform.Field annotation for more information.
*
* @see #put
*/
public Object get(String varName) {
return bindings.get(varName);
}
/**
* Returns script (shared) variable value but if value was not set returns default value. The same
* as getting groovy script variables but this method will return default value if script variable
* not assigned. To understand groovy script variables see groovy.transform.Field annotation for
* more information.
*
* @see #put
*/
public Object get(String varName, Object defValue) {
return bindings.containsKey(varName) ? bindings.get(varName) : defValue;
}
/**
* Sets a new value to interpreter's shared variables.
* Could be set by <code>put('varName', newValue )</code>
* or by just assigning <code>varName = value</code> without declaring a variable.
*/
public Object put(String varName, Object newValue) {
return bindings.put(varName, newValue);
}
/**
* starts or continues rendering html/angular and returns MarkupBuilder to build html.
* <pre> g.html().with{
* h1("hello")
* h2("world")
* }</pre>
*/
public MarkupBuilder html() {
startOutputType("%angular");
return new MarkupBuilder(out);
}
/**
* starts or continues rendering table rows
*
* @param obj: 1. List(rows) of List(columns) where first line is a header
*/
public void table(Object obj) {
if (obj == null) {
return;
}
StringBuffer sb = out.getBuffer();
startOutputType("%table");
if (obj instanceof groovy.lang.Closure) {
//if closure run and get result collection
obj = ((Closure) obj).call();
}
if (obj instanceof Collection) {
int count = 0;
for (Object row : ((Collection) obj)) {
count++;
boolean rowStarted = false;
if (row instanceof Collection) {
for (Object field : ((Collection) row)) {
if (rowStarted) {
sb.append('\t');
}
sb.append(field);
rowStarted = true;
}
} else {
sb.append(row);
}
sb.append('\n');
}
} else {
throw new RuntimeException("Not supported table value :" + obj.getClass());
}
}
private AngularObject getAngularObject(String name) {
AngularObjectRegistry registry = interpreterContext.getAngularObjectRegistry();
String noteId = interpreterContext.getNoteId();
// try get local object
AngularObject paragraphAo = registry.get(name, noteId, interpreterContext.getParagraphId());
AngularObject noteAo = registry.get(name, noteId, null);
AngularObject ao = paragraphAo != null ? paragraphAo : noteAo;
if (ao == null) {
// then global object
ao = registry.get(name, null, null);
}
return ao;
}
/**
* Get angular object. Look up notebook scope first and then global scope
*
* @param name variable name
* @return value
*/
public Object angular(String name) {
AngularObject ao = getAngularObject(name);
if (ao == null) {
return null;
} else {
return ao.get();
}
}
@SuppressWarnings("unchecked")
public void angularBind(String name, Object o, String noteId) {
AngularObjectRegistry registry = interpreterContext.getAngularObjectRegistry();
if (registry.get(name, noteId, null) == null) {
registry.add(name, o, noteId, null);
} else {
registry.get(name, noteId, null).set(o);
}
}
/**
* Create angular variable in notebook scope and bind with front end Angular display system.
* If variable exists, it'll be overwritten.
*
* @param name name of the variable
* @param o value
*/
public void angularBind(String name, Object o) {
angularBind(name, o, interpreterContext.getNoteId());
}
/*------------------------------------------RUN----------------------------------------*/
@ZeppelinApi
public List<InterpreterContextRunner> getInterpreterContextRunner(String noteId,
String paragraphId, InterpreterContext interpreterContext) {
RemoteWorksController remoteWorksController = interpreterContext.getRemoteWorksController();
if (remoteWorksController != null) {
return remoteWorksController.getRemoteContextRunner(noteId, paragraphId);
}
return new LinkedList<InterpreterContextRunner>();
}
@ZeppelinApi
public List<InterpreterContextRunner> getInterpreterContextRunner(String noteId,
InterpreterContext interpreterContext) {
RemoteWorksController remoteWorksController = interpreterContext.getRemoteWorksController();
if (remoteWorksController != null) {
return remoteWorksController.getRemoteContextRunner(noteId);
}
return new LinkedList<InterpreterContextRunner>();
}
/**
* Run paragraph by id
*/
@ZeppelinApi
public void run(String noteId, String paragraphId) {
run(noteId, paragraphId, interpreterContext);
}
/**
* Run paragraph by id
*/
@ZeppelinApi
public void run(String paragraphId) {
String noteId = interpreterContext.getNoteId();
run(noteId, paragraphId, interpreterContext);
}
/**
* Run paragraph by id
*/
@ZeppelinApi
public void run(String noteId, String paragraphId, InterpreterContext context) {
if (paragraphId.equals(context.getParagraphId())) {
throw new InterpreterException("Can not run current Paragraph");
}
List<InterpreterContextRunner> runners = getInterpreterContextRunner(noteId, paragraphId,
context);
if (runners.size() <= 0) {
throw new InterpreterException("Paragraph " + paragraphId + " not found " + runners.size());
}
for (InterpreterContextRunner r : runners) {
r.run();
}
}
public void runNote(String noteId) {
runNote(noteId, interpreterContext);
}
public void runNote(String noteId, InterpreterContext context) {
String runningNoteId = context.getNoteId();
String runningParagraphId = context.getParagraphId();
List<InterpreterContextRunner> runners = getInterpreterContextRunner(noteId, context);
if (runners.size() <= 0) {
throw new InterpreterException("Note " + noteId + " not found " + runners.size());
}
for (InterpreterContextRunner r : runners) {
if (r.getNoteId().equals(runningNoteId) && r.getParagraphId().equals(runningParagraphId)) {
continue;
}
r.run();
}
}
/**
* Run all paragraphs. except this.
*/
@ZeppelinApi
public void runAll() {
runAll(interpreterContext);
}
/**
* Run all paragraphs. except this.
*/
@ZeppelinApi
public void runAll(InterpreterContext context) {
runNote(context.getNoteId());
}
}