ValueHolderRule.java

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package com.sun.faces.facelets.tag.jsf;

import com.sun.faces.facelets.el.LegacyValueBinding;

import javax.faces.component.UIComponent;
import javax.faces.component.UISelectBoolean;
import javax.faces.component.ValueHolder;
import javax.faces.convert.Converter;
import javax.faces.view.facelets.*;

/**
 * 
 * @author Jacob Hookom
 * @version $Id$
 */
final class ValueHolderRule extends MetaRule {

    final static class LiteralConverterMetadata extends Metadata {

        private final String converterId;

        public LiteralConverterMetadata(String converterId) {
            this.converterId = converterId;
        }

        @Override
        public void applyMetadata(FaceletContext ctx, Object instance) {
            ((ValueHolder) instance).setConverter(ctx.getFacesContext()
                    .getApplication().createConverter(this.converterId));
        }
    }

    final static class DynamicConverterMetadata extends Metadata {

        private final TagAttribute attr;

        public DynamicConverterMetadata(TagAttribute attr) {
            this.attr = attr;
        }

        @Override
        public void applyMetadata(FaceletContext ctx, Object instance) {
            ((UIComponent) instance).setValueBinding("converter",
                    new LegacyValueBinding(attr.getValueExpression(ctx,
                            Converter.class)));
        }
    }

    final static class DynamicConverterMetadata2 extends Metadata {

        private final TagAttribute attr;

        public DynamicConverterMetadata2(TagAttribute attr) {
            this.attr = attr;
        }

        @Override
        public void applyMetadata(FaceletContext ctx, Object instance) {
            ((UIComponent) instance).setValueExpression("converter", attr
                    .getValueExpression(ctx, Converter.class));
        }
    }

    final static class DynamicValueExpressionMetadata extends Metadata {

        private final TagAttribute attr;

        public DynamicValueExpressionMetadata(TagAttribute attr) {
            this.attr = attr;
        }

        @Override
        public void applyMetadata(FaceletContext ctx, Object instance) {
            UIComponent c = (UIComponent) instance;
            c.setValueExpression("value", attr.getValueExpression(ctx, ((c instanceof UISelectBoolean)
                                                                        ? Boolean.class
                                                                        : Object.class)));
        }
    }

    final static class DynamicValueBindingMetadata extends Metadata {

        private final TagAttribute attr;

        public DynamicValueBindingMetadata(TagAttribute attr) {
            this.attr = attr;
        }

        @Override
        public void applyMetadata(FaceletContext ctx, Object instance) {
            ((UIComponent) instance).setValueBinding("value",
                    new LegacyValueBinding(attr.getValueExpression(ctx,
                            Object.class)));
        }
    }

    public final static ValueHolderRule Instance = new ValueHolderRule();

    @Override
    public Metadata applyRule(String name, TagAttribute attribute,
            MetadataTarget meta) {
        if (meta.isTargetInstanceOf(ValueHolder.class)) {

            if ("converter".equals(name)) {
                if (attribute.isLiteral()) {
                    return new LiteralConverterMetadata(attribute.getValue());
                } else {
                    return new DynamicConverterMetadata2(attribute);
                }
            }

            if ("value".equals(name)) {
                //if (attribute.isLiteral()) {
                //    return new LiteralValueMetadata(attribute.getValue());
                //} else {
                return new DynamicValueExpressionMetadata(attribute);
                //}
            }
        }
        return null;
    }

}