import com.sun.tools.internal.xjc.reader.gbind.Expression; //导入依赖的package包/类
public void build(XSParticle p, Collection<XSParticle> forcedProps) {
    // this class isn't about spec conformance, but
    // for the ease of use.
    // so we don't give a damn about 'forcedProps'.
    // although, for a future note, it's conceivable to expand
    // the binding algorithm to cover this notion.

    Expression tree = ExpressionBuilder.createTree(p);
    Graph g = new Graph(tree);
    for (ConnectedComponent cc : g) {
        buildProperty(cc);
    }
}
 

import com.sun.tools.internal.xjc.reader.gbind.Expression; //导入依赖的package包/类
/**
 * We can only have one {@link XmlAnyElement} property,
 * so all the wildcards need to be treated as one node.
 */
public Expression wildcard(XSWildcard wc) {
    if(wildcard==null)
        wildcard = new GWildcardElement();
    wildcard.merge(wc);
    wildcard.particles.add(current);
    return wildcard;
}
 

import com.sun.tools.internal.xjc.reader.gbind.Expression; //导入依赖的package包/类
public static Expression createTree(XSParticle p) {
    return new ExpressionBuilder().particle(p);
}
 

import com.sun.tools.internal.xjc.reader.gbind.Expression; //导入依赖的package包/类
public Expression modelGroupDecl(XSModelGroupDecl decl) {
    return modelGroup(decl.getModelGroup());
}