Author: sebb
Date: Fri Jul 31 02:24:07 2009
New Revision: 799492
URL: http://svn.apache.org/viewvc?rev=799492&view=rev
Log:
Initial implementation of Jexl Script engine and simple unit test
Added:
commons/proper/jexl/branches/2.0/src/java/org/apache/commons/jexl/scripting/JexlScriptEngine.java
(with props)
commons/proper/jexl/branches/2.0/src/test/org/apache/commons/jexl/scripting/JexlScriptEngineTest.java
(with props)
Added:
commons/proper/jexl/branches/2.0/src/java/org/apache/commons/jexl/scripting/JexlScriptEngine.java
URL:
http://svn.apache.org/viewvc/commons/proper/jexl/branches/2.0/src/java/org/apache/commons/jexl/scripting/JexlScriptEngine.java?rev=799492&view=auto
==============================================================================
---
commons/proper/jexl/branches/2.0/src/java/org/apache/commons/jexl/scripting/JexlScriptEngine.java
(added)
+++
commons/proper/jexl/branches/2.0/src/java/org/apache/commons/jexl/scripting/JexlScriptEngine.java
Fri Jul 31 02:24:07 2009
@@ -0,0 +1,202 @@
+/*
+ * 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.commons.jexl.scripting;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.Reader;
+import java.util.Collection;
+import java.util.Map;
+import java.util.Set;
+
+import javax.script.AbstractScriptEngine;
+import javax.script.Bindings;
+import javax.script.ScriptContext;
+import javax.script.ScriptEngineFactory;
+import javax.script.ScriptException;
+import javax.script.SimpleBindings;
+
+import org.apache.commons.jexl.JexlContext;
+import org.apache.commons.jexl.JexlEngine;
+import org.apache.commons.jexl.Script;
+
+// Note: this is a generated class, so won't be present until JavaCC has been
run
+import org.apache.commons.jexl.parser.ParseException;
+
+/**
+ * Implements the Jexl ScriptEngine for JSF-223.
+ * <p>
+ * See
+ * <a
href="http://java.sun.com/javase/6/docs/api/javax/script/package-summary.html";>Java
Scripting API</a>
+ * Javadoc.
+ */
+public class JexlScriptEngine extends AbstractScriptEngine {
+
+ private final ScriptEngineFactory factory;
+
+ private final JexlEngine engine;
+
+ public JexlScriptEngine() {
+ this(null);
+ }
+
+ public JexlScriptEngine(final ScriptEngineFactory _factory) {
+ factory = _factory;
+ engine = new JexlEngine();
+ }
+
+ /** {...@inheritdoc} */
+ public Bindings createBindings() {
+ return new SimpleBindings();
+ }
+
+ /** {...@inheritdoc} */
+ public Object eval(Reader script, ScriptContext context) throws
ScriptException {
+ BufferedReader reader = new BufferedReader(script);
+ StringBuilder buffer = new StringBuilder();
+ try {
+ String line;
+ try {
+ while ((line = reader.readLine()) != null) {
+ buffer.append(line).append('\n');
+ }
+ } catch (IOException e) {
+ throw new ScriptException(e);
+ }
+ } finally {
+ try {
+ reader.close();
+ } catch (IOException e) {
+ }
+ }
+ return eval(buffer.toString(), context);
+ }
+
+ /** {...@inheritdoc} */
+ @SuppressWarnings("unchecked")
+ public Object eval(String scriptText, final ScriptContext context) throws
ScriptException {
+ if (scriptText == null) {
+ return null;
+ }
+ context.setAttribute("context", context, ScriptContext.ENGINE_SCOPE);
+ try {
+ Script script = engine.createScript(scriptText);
+ JexlContext ctxt = new JexlContext(){
+ public void setVars(Map vars) {
+ context.setBindings(new SimpleBindings(vars),
ScriptContext.ENGINE_SCOPE);
+ }
+
+ public Map getVars() {
+ return new JexlContextWrapper(context);
+ }
+ };
+
+ ctxt.getVars().put("context", "value");
+
+ return script.execute(ctxt);
+ } catch (ParseException e) {
+ e.printStackTrace();
+ throw new ScriptException(e);
+ } catch (Exception e) {
+ e.printStackTrace();
+ throw new ScriptException(e.toString());
+ }
+ }
+
+ /** {...@inheritdoc} */
+ public ScriptEngineFactory getFactory() {
+ return factory == null ? new JexlScriptEngineFactory() : factory;
+ }
+
+ /**
+ * Wrapper to convert a JSR-223 ScriptContext into a JexlContext.
+ *
+ * Current implementation only gives access to ENGINE_SCOPE binding.
+ */
+ @SuppressWarnings("unchecked")
+ private static class JexlContextWrapper implements Map {
+
+ private final ScriptContext context;
+
+ private JexlContextWrapper (final ScriptContext _context){
+ context = _context;
+ }
+
+ public void clear() {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ bnd.clear();
+ }
+
+ public boolean containsKey(final Object key) {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.containsKey(key);
+ }
+
+ public boolean containsValue(final Object value) {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.containsValue(value);
+ }
+
+ public Set entrySet() {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.entrySet();
+ }
+
+ public Object get(final Object key) {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.get(key);
+ }
+
+ public boolean isEmpty() {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.isEmpty();
+ }
+
+ public Set keySet() {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.keySet();
+ }
+
+ public Object put(final Object key, final Object value) {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.put(key, value);
+ }
+
+ public void putAll(Map t) {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ bnd.putAll(t); // N.B. SimpleBindings checks for valid keys
+ }
+
+ public Object remove(Object key) {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.remove(key);
+ }
+
+ public int size() {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.size();
+ }
+
+ public Collection values() {
+ Bindings bnd = context.getBindings(ScriptContext.ENGINE_SCOPE);
+ return bnd.values();
+ }
+
+ }
+}
Propchange:
commons/proper/jexl/branches/2.0/src/java/org/apache/commons/jexl/scripting/JexlScriptEngine.java
------------------------------------------------------------------------------
svn:eol-style = native
Propchange:
commons/proper/jexl/branches/2.0/src/java/org/apache/commons/jexl/scripting/JexlScriptEngine.java
------------------------------------------------------------------------------
svn:keywords = Author Date Id Revision
Added:
commons/proper/jexl/branches/2.0/src/test/org/apache/commons/jexl/scripting/JexlScriptEngineTest.java
URL:
http://svn.apache.org/viewvc/commons/proper/jexl/branches/2.0/src/test/org/apache/commons/jexl/scripting/JexlScriptEngineTest.java?rev=799492&view=auto
==============================================================================
---
commons/proper/jexl/branches/2.0/src/test/org/apache/commons/jexl/scripting/JexlScriptEngineTest.java
(added)
+++
commons/proper/jexl/branches/2.0/src/test/org/apache/commons/jexl/scripting/JexlScriptEngineTest.java
Fri Jul 31 02:24:07 2009
@@ -0,0 +1,52 @@
+/*
+ * 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.commons.jexl.scripting;
+
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+
+import junit.framework.TestCase;
+
+public class JexlScriptEngineTest extends TestCase {
+
+ public void testScripting() throws Exception {
+ ScriptEngineManager manager = new ScriptEngineManager();
+ assertNotNull("Manager should not be null", manager);
+ ScriptEngine engine = manager.getEngineByName("jexl");
+ assertNotNull("Engine should not be null (name)", engine);
+ engine = manager.getEngineByExtension("jexl");
+ assertNotNull("Engine should not be null (ext)", engine);
+ final Integer initialValue = Integer.valueOf(123);
+ assertEquals(initialValue,engine.eval("123"));
+ assertEquals(initialValue,engine.eval("0;123"));// multiple statements
+ long time1 = System.currentTimeMillis();
+ Long time2 = (Long) engine.eval("" +
+ "sys=context.class.forName(\"java.lang.System\");"
+ +"now=sys.currentTimeMillis();"
+ );
+ assertTrue("Must take some time to process this",time1 <=
time2.longValue());
+ engine.put("value", initialValue);
+ assertEquals(initialValue,engine.get("value"));
+ final Long newValue = Long.valueOf(124);
+ assertEquals(newValue,engine.eval("old=value;value=value+1"));
+ assertEquals(initialValue,engine.get("old"));
+ assertEquals(newValue,engine.get("value"));
+ }
+
+}
Propchange:
commons/proper/jexl/branches/2.0/src/test/org/apache/commons/jexl/scripting/JexlScriptEngineTest.java
------------------------------------------------------------------------------
svn:eol-style = native
Propchange:
commons/proper/jexl/branches/2.0/src/test/org/apache/commons/jexl/scripting/JexlScriptEngineTest.java
------------------------------------------------------------------------------
svn:keywords = Author Date Id Revision
