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Truffle is a multi-language framework for executing dynamic languages that achieves high performance when combined with Graal.

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/*
 * Copyright (c) 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.  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 com.oracle.truffle.api.instrument.impl;

import com.oracle.truffle.api.*;
import com.oracle.truffle.api.frame.*;
import com.oracle.truffle.api.instrument.*;
import com.oracle.truffle.api.nodes.*;
import com.oracle.truffle.api.source.*;

public class DefaultVisualizer implements Visualizer {

    private final ASTPrinter astPrinter;

    public DefaultVisualizer() {
        this.astPrinter = new DefaultASTPrinter();
    }

    public ASTPrinter getASTPrinter() {
        return astPrinter;
    }

    public String displaySourceLocation(Node node) {
        if (node == null) {
            return "";
        }
        SourceSection section = node.getSourceSection();
        boolean estimated = false;
        if (section == null) {
            section = node.getEncapsulatingSourceSection();
            estimated = true;
        }
        return section.getShortDescription() + (estimated ? "~" : "");
    }

    public String displayMethodName(Node node) {
        if (node == null) {
            return null;
        }
        RootNode root = node.getRootNode();
        if (root == null) {
            return "unknown";
        }
        return root.getCallTarget().toString();
    }

    public String displayCallTargetName(CallTarget callTarget) {
        return callTarget.toString();
    }

    public String displayValue(ExecutionContext context, Object value) {
        return value.toString();
    }

    public String displayIdentifier(FrameSlot slot) {
        return slot.getIdentifier().toString();
    }

}