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/*
* Copyright (c) 2010, 2013, 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.internal.objects;
import jdk.internal.dynalink.CallSiteDescriptor;
import jdk.internal.dynalink.beans.StaticClass;
import jdk.internal.dynalink.linker.GuardedInvocation;
import jdk.internal.dynalink.linker.LinkRequest;
import jdk.nashorn.internal.objects.annotations.Attribute;
import jdk.nashorn.internal.objects.annotations.Constructor;
import jdk.nashorn.internal.objects.annotations.Function;
import jdk.nashorn.internal.objects.annotations.ScriptClass;
import jdk.nashorn.internal.runtime.NativeJavaPackage;
import jdk.nashorn.internal.runtime.ScriptObject;
/**
* This is "JavaImporter" constructor. This constructor allows you to use Java types omitting explicit package names.
* Objects of this constructor are used along with {@code "with"} statements and as such are not usable in ECMAScript
* strict mode. Example:
* <pre>
* var imports = new JavaImporter(java.util, java.io);
* with (imports) {
* var m = new HashMap(); // java.util.HashMap
* var f = new File("."); // java.io.File
* ...
* }
* </pre>
* Note however that the preferred way for accessing Java types in Nashorn is through the use of
* {@link NativeJava#type(Object, Object) Java.type()} method.
*/
@ScriptClass("JavaImporter")
public final class NativeJavaImporter extends ScriptObject {
private final Object[] args;
NativeJavaImporter(final Object[] args) {
this.args = args;
this.setProto(Global.instance().getJavaImporterPrototype());
}
@Override
public String getClassName() {
return "JavaImporter";
}
/**
* Constructor
* @param isNew is the new operator used for instantiating this NativeJavaImporter
* @param self self reference
* @param args arguments
* @return NativeJavaImporter instance
*/
@Constructor(arity = 1)
public static Object constructor(final boolean isNew, final Object self, final Object... args) {
return new NativeJavaImporter(args);
}
/**
* "No such property" call placeholder.
*
* This can never be called as we override {@link ScriptObject#noSuchProperty}. We do declare it here as it's a signal
* to {@link jdk.nashorn.internal.runtime.WithObject} that it's worth trying doing a {@code noSuchProperty} on this object.
*
* @param self self reference
* @param name property name
* @return never returns
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static Object __noSuchProperty__(final Object self, final Object name) {
throw new AssertionError("__noSuchProperty__ placeholder called");
}
/**
* "No such method call" placeholder
*
* This can never be called as we override {@link ScriptObject#noSuchMethod}. We do declare it here as it's a signal
* to {@link jdk.nashorn.internal.runtime.WithObject} that it's worth trying doing a noSuchProperty on this object.
*
* @param self self reference
* @param args arguments to method
* @return never returns
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static Object __noSuchMethod__(final Object self, final Object... args) {
throw new AssertionError("__noSuchMethod__ placeholder called");
}
@Override
public GuardedInvocation noSuchProperty(final CallSiteDescriptor desc, final LinkRequest request) {
return createAndSetProperty(desc) ? super.lookup(desc, request) : super.noSuchProperty(desc, request);
}
@Override
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
return createAndSetProperty(desc) ? super.lookup(desc, request) : super.noSuchMethod(desc, request);
}
private boolean createAndSetProperty(final CallSiteDescriptor desc) {
final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
final Object value = createProperty(name);
if(value != null) {
set(name, value, isStrictContext());
return true;
}
return false;
}
private Object createProperty(final String name) {
final int len = args.length;
for (int i = len - 1; i > -1; i--) {
final Object obj = args[i];
if (obj instanceof StaticClass) {
if (((StaticClass)obj).getRepresentedClass().getSimpleName().equals(name)) {
return obj;
}
} else if (obj instanceof NativeJavaPackage) {
final String pkgName = ((NativeJavaPackage)obj).getName();
final String fullName = pkgName.isEmpty() ? name : (pkgName + "." + name);
try {
return StaticClass.forClass(Class.forName(fullName));
} catch (final ClassNotFoundException e) {
// IGNORE
}
}
}
return null;
}
}
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