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 * obtain a copy of the License at
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package com.sun.faces.facelets.tag.composite;

import com.sun.faces.facelets.el.TagValueExpression;
import com.sun.faces.util.Util;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.TagAttribute;
import javax.faces.component.UIComponent;
import javax.faces.application.ProjectStage;
import javax.el.ValueExpression;
import java.util.Map;
import java.util.HashMap;
import java.util.Arrays;
import java.beans.FeatureDescriptor;


class PropertyHandlerManager {
    
    private static final Map ALL_HANDLERS =
          new HashMap(12, 1.0f);
    static {
        ALL_HANDLERS.put("targets", new StringValueExpressionPropertyHandler());
        ALL_HANDLERS.put("targetAttributeName", new StringValueExpressionPropertyHandler());
        ALL_HANDLERS.put("method-signature", new StringValueExpressionPropertyHandler());
        ALL_HANDLERS.put("type", new StringValueExpressionPropertyHandler());
        ALL_HANDLERS.put("default", new DefaultPropertyHandler());
        ALL_HANDLERS.put("displayName", new DisplayNamePropertyHandler());
        ALL_HANDLERS.put("shortDescription", new ShortDescriptionPropertyHandler());
        ALL_HANDLERS.put("expert", new ExpertPropertyHandler());
        ALL_HANDLERS.put("hidden", new HiddenPropertyHandler());
        ALL_HANDLERS.put("preferred", new PreferredPropertyHandler());
        ALL_HANDLERS.put("required", new BooleanValueExpressionPropertyHandler());
        ALL_HANDLERS.put("name", new NamePropertyHandler());
        ALL_HANDLERS.put("componentType", new ComponentTypePropertyHandler());
    }

    private static final String[] DEV_ONLY_ATTRIBUTES = {
          "displayName",
          "shortDescription",
          "export",
          "hidden",
          "preferred"
    };
    static {
        Arrays.sort(DEV_ONLY_ATTRIBUTES);
    }

    private Map managedHandlers;
    private PropertyHandler genericHandler =
          new ObjectValueExpressionPropertyHandler();


    // -------------------------------------------------------- Constructors


    private PropertyHandlerManager(Map managedHandlers) {

        this.managedHandlers = managedHandlers;

    }


    // ------------------------------------------------- Package Private Methods


    static PropertyHandlerManager getInstance(String[] attributes) {

        
        Map handlers =
              new HashMap(attributes.length, 1.0f);
        for (String attribute : attributes) {
            handlers.put(attribute, ALL_HANDLERS.get(attribute));
        }

        return new PropertyHandlerManager(handlers);

    }


    PropertyHandler getHandler(FaceletContext ctx, String name) {

        if (!ctx.getFacesContext().isProjectStage(ProjectStage.Development)) {
            if (Arrays.binarySearch(DEV_ONLY_ATTRIBUTES, name) >= 0) {
                return null;
            }
        }
        
        PropertyHandler h = managedHandlers.get(name);
        return ((h != null) ? h : genericHandler);

    }


    // ---------------------------------------------------------- Nested Classes
    
    
    private abstract static class BooleanFeatureDescriptorPropertyHandler
          implements TypedPropertyHandler {

        public Class getEvalType() {
            return Boolean.class;
        }

    } // END BooleanFeatureDescriptorPropertyHandler
    
    
    private abstract static class StringFeatureDescriptorPropertyHandler
          implements TypedPropertyHandler {

        public Class getEvalType() {
            return String.class;
        }

    } // END StringPropertyDescriptionPropertyHandler

    
    private abstract static class TypedValueExpressionPropertyHandler
          implements TypedPropertyHandler {

        public void apply(FaceletContext ctx,
                          String propName,
                          FeatureDescriptor target,
                          TagAttribute attribute) {

            target.setValue(propName,
                            attribute.getValueExpression(ctx, getEvalType()));

        }

        public abstract Class getEvalType();

    } // END TypeValueExpressionPropertyHandler

    
    private static final class NamePropertyHandler 
          extends StringFeatureDescriptorPropertyHandler {

        public void apply(FaceletContext ctx, 
                          String propName, 
                          FeatureDescriptor target, 
                          TagAttribute attribute) {
            
            ValueExpression ve = attribute.getValueExpression(ctx, getEvalType());
            String v = (String) ve.getValue(ctx);
            if (v != null) {
                target.setShortDescription((String) ve.getValue(ctx));
            }
            
        }
    }

    
    private static final class ShortDescriptionPropertyHandler
          extends StringFeatureDescriptorPropertyHandler {

        public void apply(FaceletContext ctx, 
                          String propName, 
                          FeatureDescriptor target, 
                          TagAttribute attribute) {

            ValueExpression ve = attribute.getValueExpression(ctx, getEvalType());
            String v = (String) ve.getValue(ctx);
            if (v != null) {
                target.setShortDescription((String) ve.getValue(ctx));
            }

        }

    } // END ShortDescriptionPropertyHandler
    

    private static class StringValueExpressionPropertyHandler
          extends TypedValueExpressionPropertyHandler {

        public Class getEvalType() {
            return String.class;
        }

    } // END StringValueExpressionPropertyHandler


    private static class ObjectValueExpressionPropertyHandler
          extends TypedValueExpressionPropertyHandler {

        @Override
        public Class getEvalType() {
            return Object.class;
        }

    } // END ObjectValueExpressionPropertyHandler

    /**
     * This PropertyHandler will apply the default-value of a cc:attribute
     * tag, taking an eventually provided type into account.
     */
    private static class DefaultPropertyHandler
            implements PropertyHandler {

        public void apply(FaceletContext ctx,
                String propName,
                FeatureDescriptor target,
                TagAttribute attribute) {

            // try to get the type from the 'type'-attribute and default to
            // Object.class, if no type-attribute was set.
            Class type = Object.class;
            Object obj = target.getValue("type");
            if ((null != obj) && !(obj instanceof Class)) {
                TagValueExpression typeVE = (TagValueExpression) obj;
                Object value = typeVE.getValue(ctx);
                if (value instanceof Class) {
                    type = (Class) value;
                } else if (value != null) {
                    try {
                        type = Util.loadClass(String.valueOf(value), this);
                    } catch (ClassNotFoundException ex) {
                        // Wrap the ClassNotFoundException into a
                        // RuntimeException, so that it can be unwrapped in the
                        // caller
                        throw new IllegalArgumentException(ex);
                    }
                }
            } else {
                type = null != obj ? (Class) obj : Object.class;
            }
            target.setValue(propName, attribute.getValueExpression(ctx, type));
        }
        
    }

    private static class ComponentTypePropertyHandler
          extends StringValueExpressionPropertyHandler {

        @Override
        public void apply(FaceletContext ctx,
                          String propName,
                          FeatureDescriptor target,
                          TagAttribute attribute) {
            super.apply(ctx,
                        UIComponent.COMPOSITE_COMPONENT_TYPE_KEY,
                        target,
                        attribute);

        }

    } // END ComponentTypePropertyHandler
    

    private static final class PreferredPropertyHandler
          extends BooleanFeatureDescriptorPropertyHandler {

        public void apply(FaceletContext ctx, String propName, FeatureDescriptor target, TagAttribute attribute) {

            ValueExpression ve = attribute
                  .getValueExpression(ctx, getEvalType());
            target.setPreferred((Boolean) ve.getValue(ctx));

        }

    } // END PreferredPropertyHandler

    
    private static final class HiddenPropertyHandler
          extends BooleanFeatureDescriptorPropertyHandler {

        public void apply(FaceletContext ctx, String propName, FeatureDescriptor target, TagAttribute attribute) {

            ValueExpression ve = attribute
                  .getValueExpression(ctx, getEvalType());
            target.setHidden((Boolean) ve.getValue(ctx));

        }

    } // END HiddenPropertyHandler
    

    private static final class ExpertPropertyHandler
          extends BooleanFeatureDescriptorPropertyHandler {

        public void apply(FaceletContext ctx, String propName, FeatureDescriptor target, TagAttribute attribute) {

            ValueExpression ve = attribute
                  .getValueExpression(ctx, getEvalType());
            target.setExpert((Boolean) ve.getValue(ctx));

        }

    } // END ExpertPropertyHandler

    
    private static final class DisplayNamePropertyHandler
          extends StringFeatureDescriptorPropertyHandler {

        public void apply(FaceletContext ctx, String propName, FeatureDescriptor target, TagAttribute attribute) {

            ValueExpression ve = attribute
                  .getValueExpression(ctx, getEvalType());
            target.setDisplayName((String) ve.getValue(ctx));
        }

    } // END DisplayNamePropertyHandler

    
    private static class BooleanValueExpressionPropertyHandler
          extends TypedValueExpressionPropertyHandler {

        public Class getEvalType() {
            return Boolean.class;
        }

    } // END BooleanValueExpressionPropertyHandler
    
}




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