/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.elasticsearch.script.javascript;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.Scorer;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.script.ExecutableScript;
import org.elasticsearch.script.ScriptEngineService;
import org.elasticsearch.script.SearchScript;
import org.elasticsearch.script.javascript.support.NativeList;
import org.elasticsearch.script.javascript.support.NativeMap;
import org.elasticsearch.script.javascript.support.ScriptValueConverter;
import org.elasticsearch.search.lookup.SearchLookup;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.Script;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptableObject;
import org.mozilla.javascript.WrapFactory;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;
/**
* @author kimchy (shay.banon)
*/
public class JavaScriptScriptEngineService extends AbstractComponent implements ScriptEngineService {
private final AtomicLong counter = new AtomicLong();
private static WrapFactory wrapFactory = new CustomWrapFactory();
private final int optimizationLevel;
private Scriptable globalScope;
@Inject public JavaScriptScriptEngineService(Settings settings) {
super(settings);
this.optimizationLevel = componentSettings.getAsInt("optimization_level", 1);
Context ctx = Context.enter();
try {
ctx.setWrapFactory(wrapFactory);
globalScope = ctx.initStandardObjects(null, true);
} finally {
Context.exit();
}
}
@Override public void close() {
}
@Override public String[] types() {
return new String[]{"js", "javascript"};
}
@Override public String[] extensions() {
return new String[]{"js"};
}
@Override public Object compile(String script) {
Context ctx = Context.enter();
try {
ctx.setWrapFactory(wrapFactory);
ctx.setOptimizationLevel(optimizationLevel);
return ctx.compileString(script, generateScriptName(), 1, null);
} finally {
Context.exit();
}
}
@Override public ExecutableScript executable(Object compiledScript, Map<String, Object> vars) {
Context ctx = Context.enter();
try {
ctx.setWrapFactory(wrapFactory);
Scriptable scope = ctx.newObject(globalScope);
scope.setPrototype(globalScope);
scope.setParentScope(null);
for (Map.Entry<String, Object> entry : vars.entrySet()) {
ScriptableObject.putProperty(scope, entry.getKey(), entry.getValue());
}
return new JavaScriptExecutableScript((Script) compiledScript, scope);
} finally {
Context.exit();
}
}
@Override public SearchScript search(Object compiledScript, SearchLookup lookup, @Nullable Map<String, Object> vars) {
Context ctx = Context.enter();
try {
ctx.setWrapFactory(wrapFactory);
Scriptable scope = ctx.newObject(globalScope);
scope.setPrototype(globalScope);
scope.setParentScope(null);
for (Map.Entry<String, Object> entry : lookup.asMap().entrySet()) {
ScriptableObject.putProperty(scope, entry.getKey(), entry.getValue());
}
if (vars != null) {
for (Map.Entry<String, Object> entry : vars.entrySet()) {
ScriptableObject.putProperty(scope, entry.getKey(), entry.getValue());
}
}
return new JavaScriptSearchScript((Script) compiledScript, scope, lookup);
} finally {
Context.exit();
}
}
@Override public Object execute(Object compiledScript, Map<String, Object> vars) {
Context ctx = Context.enter();
ctx.setWrapFactory(wrapFactory);
try {
Script script = (Script) compiledScript;
Scriptable scope = ctx.newObject(globalScope);
scope.setPrototype(globalScope);
scope.setParentScope(null);
for (Map.Entry<String, Object> entry : vars.entrySet()) {
ScriptableObject.putProperty(scope, entry.getKey(), entry.getValue());
}
Object ret = script.exec(ctx, scope);
return ScriptValueConverter.unwrapValue(ret);
} finally {
Context.exit();
}
}
@Override public Object unwrap(Object value) {
return ScriptValueConverter.unwrapValue(value);
}
private String generateScriptName() {
return "Script" + counter.incrementAndGet() + ".js";
}
public static class JavaScriptExecutableScript implements ExecutableScript {
private final Script script;
private final Scriptable scope;
public JavaScriptExecutableScript(Script script, Scriptable scope) {
this.script = script;
this.scope = scope;
}
@Override public Object run() {
Context ctx = Context.enter();
try {
ctx.setWrapFactory(wrapFactory);
return ScriptValueConverter.unwrapValue(script.exec(ctx, scope));
} finally {
Context.exit();
}
}
@Override public void setNextVar(String name, Object value) {
ScriptableObject.putProperty(scope, name, value);
}
@Override public Object unwrap(Object value) {
return ScriptValueConverter.unwrapValue(value);
}
}
public static class JavaScriptSearchScript implements SearchScript {
private final Script script;
private final Scriptable scope;
private final SearchLookup lookup;
public JavaScriptSearchScript(Script script, Scriptable scope, SearchLookup lookup) {
this.script = script;
this.scope = scope;
this.lookup = lookup;
}
@Override public void setScorer(Scorer scorer) {
lookup.setScorer(scorer);
}
@Override public void setNextReader(IndexReader reader) {
lookup.setNextReader(reader);
}
@Override public void setNextDocId(int doc) {
lookup.setNextDocId(doc);
}
@Override public void setNextScore(float score) {
ScriptableObject.putProperty(scope, "_score", score);
}
@Override public void setNextVar(String name, Object value) {
ScriptableObject.putProperty(scope, name, value);
}
@Override public void setNextSource(Map<String, Object> source) {
lookup.source().setNextSource(source);
}
@Override public Object run() {
Context ctx = Context.enter();
try {
ctx.setWrapFactory(wrapFactory);
return ScriptValueConverter.unwrapValue(script.exec(ctx, scope));
} finally {
Context.exit();
}
}
@Override public float runAsFloat() {
return ((Number) run()).floatValue();
}
@Override public long runAsLong() {
return ((Number) run()).longValue();
}
@Override public double runAsDouble() {
return ((Number) run()).doubleValue();
}
@Override public Object unwrap(Object value) {
return ScriptValueConverter.unwrapValue(value);
}
}
/**
* Wrap Factory for Rhino Script Engine
*/
public static class CustomWrapFactory extends WrapFactory {
public CustomWrapFactory() {
setJavaPrimitiveWrap(false); // RingoJS does that..., claims its annoying...
}
public Scriptable wrapAsJavaObject(Context cx, Scriptable scope, Object javaObject, Class staticType) {
if (javaObject instanceof Map) {
return new NativeMap(scope, (Map) javaObject);
}
if (javaObject instanceof List) {
return new NativeList(scope, (List) javaObject);
}
return super.wrapAsJavaObject(cx, scope, javaObject, staticType);
}
}
}