/* | |
* Copyright (C) 2007-2010 JĂșlio Vilmar Gesser. | |
* Copyright (C) 2011, 2013-2016 The JavaParser Team. | |
* | |
* This file is part of JavaParser. | |
* | |
* JavaParser can be used either under the terms of | |
* a) the GNU Lesser General Public License as published by | |
* the Free Software Foundation, either version 3 of the License, or | |
* (at your option) any later version. | |
* b) the terms of the Apache License | |
* | |
* You should have received a copy of both licenses in LICENCE.LGPL and | |
* LICENCE.APACHE. Please refer to those files for details. | |
* | |
* JavaParser 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 Lesser General Public License for more details. | |
*/ | |
package com.github.javaparser.printer; | |
import static com.github.javaparser.utils.Utils.EOL; | |
import static com.github.javaparser.utils.Utils.assertNotNull; | |
import static java.util.stream.Collectors.toList; | |
import java.util.List; | |
import com.github.javaparser.ast.Node; | |
import com.github.javaparser.ast.NodeList; | |
import com.github.javaparser.metamodel.NodeMetaModel; | |
import com.github.javaparser.metamodel.PropertyMetaModel; | |
/** | |
* Outputs a Graphviz diagram of the AST. | |
*/ | |
public class DotPrinter { | |
private int nodeCount; | |
private final boolean outputNodeType; | |
public DotPrinter(boolean outputNodeType) { | |
this.outputNodeType = outputNodeType; | |
} | |
public String output(Node node) { | |
nodeCount = 0; | |
StringBuilder output = new StringBuilder(); | |
output.append("digraph {"); | |
output(node, null, "root", output); | |
output.append(EOL + "}"); | |
return output.toString(); | |
} | |
public void output(Node node, String parentNodeName, String name, StringBuilder builder) { | |
assertNotNull(node); | |
NodeMetaModel metaModel = node.getMetaModel(); | |
List<PropertyMetaModel> allPropertyMetaModels = metaModel.getAllPropertyMetaModels(); | |
List<PropertyMetaModel> attributes = allPropertyMetaModels.stream().filter(PropertyMetaModel::isAttribute) | |
.filter(PropertyMetaModel::isSingular).collect(toList()); | |
List<PropertyMetaModel> subNodes = allPropertyMetaModels.stream().filter(PropertyMetaModel::isNode) | |
.filter(PropertyMetaModel::isSingular).collect(toList()); | |
List<PropertyMetaModel> subLists = allPropertyMetaModels.stream().filter(PropertyMetaModel::isNodeList) | |
.collect(toList()); | |
String ndName = nextNodeName(); | |
if (outputNodeType) | |
builder.append(EOL + ndName + " [label=\"" + escape(name) + " (" + metaModel.getTypeName() | |
+ ")\"];"); | |
else | |
builder.append(EOL + ndName + " [label=\"" + escape(name) + "\"];"); | |
if (parentNodeName != null) | |
builder.append(EOL + parentNodeName + " -> " + ndName + ";"); | |
for (PropertyMetaModel a : attributes) { | |
String attrName = nextNodeName(); | |
builder.append(EOL + attrName + " [label=\"" + escape(a.getName()) + "='" | |
+ escape(a.getValue(node).toString()) + "'\"];"); | |
builder.append(EOL + ndName + " -> " + attrName + ";"); | |
} | |
for (PropertyMetaModel sn : subNodes) { | |
Node nd = (Node) sn.getValue(node); | |
if (nd != null) | |
output(nd, ndName, sn.getName(), builder); | |
} | |
for (PropertyMetaModel sl : subLists) { | |
NodeList<? extends Node> nl = (NodeList<? extends Node>) sl.getValue(node); | |
if (nl != null && nl.isNonEmpty()) { | |
String ndLstName = nextNodeName(); | |
builder.append(EOL + ndLstName + " [label=\"" + escape(sl.getName()) + "\"];"); | |
builder.append(EOL + ndName + " -> " + ndLstName + ";"); | |
String slName = sl.getName().substring(0, sl.getName().length() - 1); | |
for (Node nd : nl) | |
output(nd, ndLstName, slName, builder); | |
} | |
} | |
} | |
private String nextNodeName() { | |
return "n" + (nodeCount++); | |
} | |
private static String escape(String value) { | |
return value.replace("\"", "\\\""); | |
} | |
} |