/*******************************************************************************
 * Copyright (c) 2001, 2007 Oracle Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Oracle Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.jsf.validation.internal.appconfig;

import java.util.List;

import org.eclipse.core.resources.IFile;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jst.jsf.facesconfig.emf.ComponentClassType;
import org.eclipse.jst.jsf.facesconfig.emf.FacesConfigPackage;
import org.eclipse.jst.jsf.facesconfig.emf.FacetNameType;

/**
 * Validator for a <component>
 * 
 * @author cbateman
 *
 */
public class ComponentValidatorVisitor extends EObjectValidationVisitor 
{
    /**
     * @param version
     */
    public ComponentValidatorVisitor(final String version)
    {
        super(FacesConfigPackage.eINSTANCE.getFacesConfigType_Component(),
                version);
    }
    
    protected void doValidate(EObject object, List messages, IFile file) {
        // nothing in the tag to validate
    }

    protected EObjectValidationVisitor[] getChildNodeValidators() {
        return new EObjectValidationVisitor[]
        {
            new ComponentClassValidationVisitor(getVersion()),
            new AttributeValidationVisitor(FacesConfigPackage.eINSTANCE.getComponentType_Attribute(), getVersion()),
            new PropertyValidationVisitor
                (FacesConfigPackage.eINSTANCE.getComponentType_Property()
                ,FacesConfigPackage.eINSTANCE.getComponentType_ComponentClass()
                ,getVersion()),
            new ComponentFacetValidationVisitor(getVersion())
        };
    }

    private static class ComponentClassValidationVisitor extends ClassNameEObjectValidationVisitor
    {
        ComponentClassValidationVisitor(final String version)
        {
            super(FacesConfigPackage.eINSTANCE.getComponentType_ComponentClass(),
                    version);
        }
        
        protected String getFullyQualifiedName(EObject eobj) 
        {
            return ((ComponentClassType)eobj).getTextContent();
        }

        protected String getInstanceOf() {
            return "javax.faces.component.UIComponent";
        }

        protected EObjectValidationVisitor[] getChildNodeValidators() {
            return NO_CHILDREN;
        }

        @Override
        protected boolean mustBeClass() {
            // must a class
            return true;
        }
    }
    
    private static class ComponentFacetValidationVisitor extends EObjectValidationVisitor
    {
        /**
         * @param version
         */
        public ComponentFacetValidationVisitor(String version) 
        {
            super(FacesConfigPackage.eINSTANCE.getComponentType_Facet(), version);
        }

        protected void doValidate(EObject object, List messages, IFile file) {
            // do nothing
        }

        protected EObjectValidationVisitor[] getChildNodeValidators() {
            return new EObjectValidationVisitor[]
            {
                    new FacetNameValidationVisitor(getVersion())
            };
        }
        
        private static class FacetNameValidationVisitor extends EObjectValidationVisitor
        {
            /**
             * @param version
             */
            public FacetNameValidationVisitor(String version) {
                super(FacesConfigPackage.eINSTANCE.getFacetType_FacetName(),
                        version);
            }

            protected void doValidate(EObject object, List messages, IFile file) {
                FacetNameType name = (FacetNameType) object;
                boolean   isValid = false;
                
                if (name.getTextContent() != null
                        || "".equals(name.getTextContent().trim()))
                {
                    String nameValue = name.getTextContent().trim();

                    // TODO: isJavaIdentifierStart seems broken...
                    if (Character.isJavaIdentifierStart(nameValue.charAt(0)))
                    {
                        isValid = true;
                        for (int i = 1; i < nameValue.length(); i++)
                        {
                            if (!Character.isJavaIdentifierPart(nameValue.charAt(i)))
                            {
                                isValid = false;
                            }
                        }
                    }
                }
                
                if (!isValid)
                {
                    addMessageInfo(messages, 
                            DiagnosticFactory.create_MUST_BE_A_VALID_JAVA_IDENT("Facet name")
                            , object, file);
                }
            }

            protected EObjectValidationVisitor[] getChildNodeValidators() {
                return NO_CHILDREN;
            }
            
        }
    }
}