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 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * 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

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package com.sun.tools.internal.xjc.reader.xmlschema;

import java.util.Collection;

import com.sun.tools.internal.xjc.model.CPropertyInfo;

import com.sun.tools.internal.xjc.model.Multiplicity;

import com.sun.tools.internal.xjc.reader.RawTypeSet;

import com.sun.tools.internal.xjc.reader.gbind.ConnectedComponent;

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.Graph;

import com.sun.tools.internal.xjc.reader.xmlschema.bindinfo.BIProperty;

import com.sun.xml.internal.bind.v2.model.core.WildcardMode;

import com.sun.xml.internal.xsom.XSParticle;

/**

 * {@link ParticleBinder} that uses {@link ExpressionBuilder} et al

 * for better, more intuitive (but non spec-conforming) binding.

 *

 * @author Kohsuke Kawaguchi

 */

final class ExpressionParticleBinder extends ParticleBinder {

    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);

        }

    }

    /**

     * Builds a property ouf ot a connected component.

     */

    private void buildProperty(ConnectedComponent cc) {

        StringBuilder propName = new StringBuilder(); // property name

        int nameTokenCount = 0; // combine only up to 3

        RawTypeSetBuilder rtsb = new RawTypeSetBuilder();

        for (Element e : cc) {

            GElement ge = (GElement)e;

            if(nameTokenCount<3) {

                if(nameTokenCount!=0)

                    propName.append("And");

                propName.append(makeJavaName(cc.isCollection(),ge.getPropertyNameSeed()));

                nameTokenCount++;

            }

            if(e instanceof GElementImpl) {

                GElementImpl ei = (GElementImpl) e;

                rtsb.elementDecl(ei.decl);

                continue;

            }

            if(e instanceof GWildcardElement) {

                GWildcardElement w = (GWildcardElement)e;

                rtsb.getRefs().add(new RawTypeSetBuilder.WildcardRef(

                    w.isStrict() ? WildcardMode.STRICT : WildcardMode.SKIP));

                continue;

            }

            assert false : e;   // no other kind should be here

        }

        Multiplicity m = Multiplicity.ONE;

        if(cc.isCollection())

            m = m.makeRepeated();

        if(!cc.isRequired())

            m = m.makeOptional();

        RawTypeSet rts = new RawTypeSet(rtsb.getRefs(),m);

        XSParticle p = findSourceParticle(cc);

        BIProperty cust = BIProperty.getCustomization(p);

        CPropertyInfo prop = cust.createElementOrReferenceProperty(

            propName.toString(), false, p, rts );

        getCurrentBean().addProperty(prop);

    }

    /**

     * Finds a {@link XSParticle} that can serve as the representative property of

     * the given {@link ConnectedComponent}.

     *

     * The representative property is used for reporting an error location and

     * taking {@link BIProperty} customization. Right now, the algorithm is just pick

     * the first one with {@link BIProperty}, but one can think of a better algorithm,

     * such as taking a choice of (A|B) if CC={A,B}.

     */

    private XSParticle findSourceParticle(ConnectedComponent cc) {

        XSParticle first = null;

        for (Element e : cc) {

            GElement ge = (GElement)e;

            for (XSParticle p : ge.particles) {

                if(first==null)

                    first = p;

                if(getLocalPropCustomization(p)!=null)

                    return p;

            }

            // if there are multiple property customizations,

            // all but one will be left unused, which will be detected as an error

            // later, so no need to check that now.

        }

        // if no customization was found, just use the first one.

        return first;

    }

    public boolean checkFallback(XSParticle p) {

        // this algorithm never falls back to 'getContent'.

        return false;

    }

}