import com.sun.hotspot.igv.data.InputEdge; //导入依赖的package包/类
@Override
protected InputEdge start() throws SAXException {
    int toIndex = 0;
    int from = -1;
    int to = -1;

    try {
        String toIndexString = readAttribute(TO_INDEX_PROPERTY);
        if (toIndexString != null) {
            toIndex = Integer.parseInt(toIndexString);
        }

        from = lookupID(readRequiredAttribute(FROM_PROPERTY));
        to = lookupID(readRequiredAttribute(TO_PROPERTY));
    } catch (NumberFormatException e) {
        throw new SAXException(e);
    }


    InputEdge conn = new InputEdge((char) toIndex, from, to);
    return start(conn);
}
 

import com.sun.hotspot.igv.data.InputEdge; //导入依赖的package包/类
private Properties createProperties(InputEdge edge) {
    Properties p = new Properties();
    p.setProperty(Parser.TO_INDEX_PROPERTY, Integer.toString(edge.getToIndex()));
    p.setProperty(Parser.TO_PROPERTY, Integer.toString(edge.getTo()));
    p.setProperty(Parser.FROM_PROPERTY, Integer.toString(edge.getFrom()));
    return p;
}
 

import com.sun.hotspot.igv.data.InputEdge; //导入依赖的package包/类
@Override
public int compare(InputEdge o1, InputEdge o2) {
    return o1.getToIndex() - o2.getToIndex();
}
 

import com.sun.hotspot.igv.data.InputEdge; //导入依赖的package包/类
private static void markAsNew(InputEdge e) {
    e.setState(InputEdge.State.NEW);
}
 

import com.sun.hotspot.igv.data.InputEdge; //导入依赖的package包/类
private static void markAsSame(InputEdge e) {
    e.setState(InputEdge.State.SAME);
}
 

import com.sun.hotspot.igv.data.InputEdge; //导入依赖的package包/类
public int compare(InputEdge o1, InputEdge o2) {
    return o1.getToIndex() - o2.getToIndex();
}