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DotGraphEdge.java
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100 lines (90 loc) · 2.59 KB
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package soot.util.dot;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2002 Sable Research Group
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program 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 Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>.
* #L%
*/
import java.io.IOException;
import java.io.OutputStream;
import java.util.Collection;
/**
* Graph edges are the major elements of a graph
*
* @author Feng Qian
*/
public class DotGraphEdge extends AbstractDotGraphElement implements Renderable {
private final DotGraphNode start;
private final DotGraphNode end;
private final boolean isDirected;
/**
* Draws a directed edge.
*
* @param src,
* the source node
* @param dst,
* the end node
*/
public DotGraphEdge(DotGraphNode src, DotGraphNode dst) {
this.start = src;
this.end = dst;
this.isDirected = true;
}
/**
* Draws a graph edge by specifying directed or undirected.
*
* @param src,
* the source node
* @param dst,
* the end node
* @param directed,
* the edge is directed or not
*/
public DotGraphEdge(DotGraphNode src, DotGraphNode dst, boolean directed) {
this.start = src;
this.end = dst;
this.isDirected = directed;
}
/**
* Sets the edge style.
*
* @param style,
* a style of edge
* @see DotGraphConstants
*/
public void setStyle(String style) {
this.setAttribute("style", style);
}
@Override
public void render(OutputStream out, int indent) throws IOException {
StringBuilder line = new StringBuilder();
line.append(this.start.getName());
line.append(this.isDirected ? "->" : "--");
line.append(this.end.getName());
Collection<DotGraphAttribute> attrs = this.getAttributes();
if (!attrs.isEmpty()) {
line.append(" [");
for (DotGraphAttribute attr : attrs) {
line.append(attr.toString()).append(',');
}
line.append(']');
}
line.append(';');
DotGraphUtility.renderLine(out, line.toString(), indent);
}
}