Mercurial > hg > graal-jvmci-8
diff graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/access/SLReadPropertyNode.java @ 18411:dc2e000bed40
SL: add basic support for creating objects and accessing properties
author | Andreas Woess <andreas.woess@jku.at> |
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date | Tue, 18 Nov 2014 23:02:58 +0100 |
parents | |
children | 997bc9764a9a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/access/SLReadPropertyNode.java Tue Nov 18 23:02:58 2014 +0100 @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2013, 2014, 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. + * + * 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 com.oracle.truffle.sl.nodes.access; + +import java.util.*; + +import com.oracle.truffle.api.frame.*; +import com.oracle.truffle.api.nodes.*; +import com.oracle.truffle.api.source.*; +import com.oracle.truffle.sl.*; +import com.oracle.truffle.sl.nodes.*; + +/** + * The node for accessing a property of an object. When executed, this node first evaluates the + * object expression on the left side of the dot operator and then reads the named property. + */ +@NodeInfo(shortName = ".") +public final class SLReadPropertyNode extends SLExpressionNode { + + public static SLReadPropertyNode create(SourceSection src, SLExpressionNode receiverNode, String propertyName) { + return new SLReadPropertyNode(src, receiverNode, propertyName); + } + + @Child protected SLExpressionNode receiverNode; + protected final String propertyName; + + private SLReadPropertyNode(SourceSection src, SLExpressionNode receiverNode, String propertyName) { + super(src); + this.receiverNode = receiverNode; + this.propertyName = propertyName; + } + + @Override + public Object executeGeneric(VirtualFrame frame) { + Object object = receiverNode.executeGeneric(frame); + if (object instanceof Map) { + return ((Map<?, ?>) object).get(propertyName); + } else { + throw new SLException("unexpected receiver type"); + } + } +}