| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nashorn.tools.jjs; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.WeakHashMap; |
| import java.util.stream.Collectors; |
| import jdk.nashorn.internal.runtime.JSType; |
| import jdk.nashorn.internal.runtime.NativeJavaPackage; |
| import jdk.nashorn.internal.runtime.PropertyMap; |
| import jdk.nashorn.internal.runtime.ScriptObject; |
| import jdk.nashorn.internal.runtime.ScriptRuntime; |
| import jdk.nashorn.internal.objects.NativeJava; |
| |
| /* |
| * A helper class to get properties of a given object for source code completion. |
| */ |
| final class PropertiesHelper { |
| // Java package properties helper, may be null |
| private PackagesHelper pkgsHelper; |
| // cached properties list |
| private final WeakHashMap<Object, List<String>> propsCache = new WeakHashMap<>(); |
| |
| /** |
| * Construct a new PropertiesHelper. |
| * |
| * @param classPath Class path to compute properties of java package objects |
| */ |
| PropertiesHelper(final String classPath) { |
| if (PackagesHelper.isAvailable()) { |
| try { |
| this.pkgsHelper = new PackagesHelper(classPath); |
| } catch (final IOException exp) { |
| if (Main.DEBUG) { |
| exp.printStackTrace(); |
| } |
| this.pkgsHelper = null; |
| } |
| } |
| } |
| |
| void close() throws Exception { |
| propsCache.clear(); |
| pkgsHelper.close(); |
| } |
| |
| /** |
| * returns the list of properties of the given object. |
| * |
| * @param obj object whose property list is returned |
| * @return the list of properties of the given object |
| */ |
| List<String> getProperties(final Object obj) { |
| assert obj != null && obj != ScriptRuntime.UNDEFINED; |
| |
| // wrap JS primitives as objects before gettting properties |
| if (JSType.isPrimitive(obj)) { |
| return getProperties(JSType.toScriptObject(obj)); |
| } |
| |
| // Handle Java package prefix case first. Should do it before checking |
| // for its super class ScriptObject! |
| if (obj instanceof NativeJavaPackage) { |
| if (pkgsHelper != null) { |
| return pkgsHelper.getPackageProperties(((NativeJavaPackage)obj).getName()); |
| } else { |
| return Collections.<String>emptyList(); |
| } |
| } |
| |
| // script object - all inherited and non-enumerable, non-index properties |
| if (obj instanceof ScriptObject) { |
| final ScriptObject sobj = (ScriptObject)obj; |
| final PropertyMap pmap = sobj.getMap(); |
| if (propsCache.containsKey(pmap)) { |
| return propsCache.get(pmap); |
| } |
| final String[] keys = sobj.getAllKeys(); |
| List<String> props = Arrays.asList(keys); |
| props = props.stream() |
| .filter(s -> Character.isJavaIdentifierStart(s.charAt(0))) |
| .collect(Collectors.toList()); |
| Collections.sort(props); |
| // cache properties against the PropertyMap |
| propsCache.put(pmap, props); |
| return props; |
| } |
| |
| // java class case - don't refer to StaticClass directly |
| if (NativeJava.isType(ScriptRuntime.UNDEFINED, obj)) { |
| if (propsCache.containsKey(obj)) { |
| return propsCache.get(obj); |
| } |
| final List<String> props = NativeJava.getProperties(obj); |
| Collections.sort(props); |
| // cache properties against the StaticClass representing the class |
| propsCache.put(obj, props); |
| return props; |
| } |
| |
| // any other Java object |
| final Class<?> clazz = obj.getClass(); |
| if (propsCache.containsKey(clazz)) { |
| return propsCache.get(clazz); |
| } |
| |
| final List<String> props = NativeJava.getProperties(obj); |
| Collections.sort(props); |
| // cache properties against the Class object |
| propsCache.put(clazz, props); |
| return props; |
| } |
| |
| /** |
| * Returns the list of properties of the given object that start with the given prefix. |
| * |
| * @param obj object whose property list is returned |
| * @param prefix property prefix to be matched |
| * @return the list of properties of the given object |
| */ |
| List<String> getProperties(final Object obj, final String prefix) { |
| assert prefix != null && !prefix.isEmpty(); |
| return getProperties(obj).stream() |
| .filter(s -> s.startsWith(prefix)) |
| .collect(Collectors.toList()); |
| } |
| } |