| /* |
| * Copyright (c) 1997, 2012, 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.sun.tools.internal.xjc.reader.xmlschema; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import javax.xml.bind.annotation.XmlAnyElement; |
| import javax.xml.namespace.QName; |
| |
| import com.sun.tools.internal.xjc.reader.gbind.Choice; |
| import com.sun.tools.internal.xjc.reader.gbind.Element; |
| import com.sun.tools.internal.xjc.reader.gbind.Expression; |
| import com.sun.tools.internal.xjc.reader.gbind.OneOrMore; |
| import com.sun.tools.internal.xjc.reader.gbind.Sequence; |
| import com.sun.xml.internal.xsom.XSElementDecl; |
| import com.sun.xml.internal.xsom.XSModelGroup; |
| import com.sun.xml.internal.xsom.XSModelGroupDecl; |
| import com.sun.xml.internal.xsom.XSParticle; |
| import com.sun.xml.internal.xsom.XSWildcard; |
| import com.sun.xml.internal.xsom.visitor.XSTermFunction; |
| import java.math.BigInteger; |
| |
| /** |
| * Visits {@link XSParticle} and creates a corresponding {@link Expression} tree. |
| * @author Kohsuke Kawaguchi |
| */ |
| public final class ExpressionBuilder implements XSTermFunction<Expression> { |
| |
| public static Expression createTree(XSParticle p) { |
| return new ExpressionBuilder().particle(p); |
| } |
| |
| private ExpressionBuilder() {} |
| |
| /** |
| * Wildcard instance needs to be consolidated to one, |
| * and this is such instance (if any.) |
| */ |
| private GWildcardElement wildcard = null; |
| |
| private final Map<QName,GElementImpl> decls = new HashMap<QName,GElementImpl>(); |
| |
| private XSParticle current; |
| |
| /** |
| * 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; |
| } |
| |
| public Expression modelGroupDecl(XSModelGroupDecl decl) { |
| return modelGroup(decl.getModelGroup()); |
| } |
| |
| public Expression modelGroup(XSModelGroup group) { |
| XSModelGroup.Compositor comp = group.getCompositor(); |
| if(comp==XSModelGroup.CHOICE) { |
| // empty choice is not epsilon, but empty set, |
| // so this initial value is incorrect. But this |
| // kinda works. |
| // properly handling empty set requires more work. |
| Expression e = Expression.EPSILON; |
| for (XSParticle p : group.getChildren()) { |
| if(e==null) e = particle(p); |
| else e = new Choice(e,particle(p)); |
| } |
| return e; |
| } else { |
| Expression e = Expression.EPSILON; |
| for (XSParticle p : group.getChildren()) { |
| if(e==null) e = particle(p); |
| else e = new Sequence(e,particle(p)); |
| } |
| return e; |
| } |
| } |
| |
| public Element elementDecl(XSElementDecl decl) { |
| QName n = BGMBuilder.getName(decl); |
| |
| GElementImpl e = decls.get(n); |
| if(e==null) |
| decls.put(n,e=new GElementImpl(n,decl)); |
| |
| e.particles.add(current); |
| assert current.getTerm()==decl; |
| |
| return e; |
| } |
| |
| public Expression particle(XSParticle p) { |
| current = p; |
| Expression e = p.getTerm().apply(this); |
| |
| if(p.isRepeated()) |
| e = new OneOrMore(e); |
| |
| if (BigInteger.ZERO.equals(p.getMinOccurs())) |
| e = new Choice(e,Expression.EPSILON); |
| |
| return e; |
| } |
| |
| } |