/*******************************************************************************
 * Copyright (c) 2007 IBM 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.html.core.internal.contentmodel;


import java.lang.reflect.Field;

import org.eclipse.wst.xml.core.internal.contentmodel.CMAttributeDeclaration;
import org.eclipse.wst.xml.core.internal.contentmodel.CMDataType;
import org.eclipse.wst.xml.core.internal.contentmodel.CMElementDeclaration;
import org.eclipse.wst.xml.core.internal.contentmodel.CMGroup;
import org.eclipse.wst.xml.core.internal.contentmodel.CMNode;

/**
 * Factory for element declarations of JSP 1.1 and JSP 1.2.
 */
final class JSP20ElementCollection extends JSPElementCollection implements JSP20Namespace.ElementName {

	// element IDs
	private static class Ids20 extends Ids {
		public static final int ID_BODY = 17;
		public static final int ID_ATTRIBUTE = 18;
		public static final int ID_ELEMENT = 19;
		public static final int ID_OUTPUT = 20;

		public static int getNumOfIds() {
			if (numofids != -1)
				return numofids;

			// NOTE: If the reflection is too slow, this method should
			// just return the literal value, like 105.
			// -- 5/25/2001
			Class clazz = Ids20.class;
			Field[] fields = clazz.getFields();
			numofids = 0;
			for (int i = 0; i < fields.length; i++) {
				String name = fields[i].getName();
				if (name.startsWith("ID_"))//$NON-NLS-1$
					numofids++;
			}
			return numofids;
		}

		// chache the result of the reflection.
		private static int numofids = -1;
	}

	// attribute creater
	private class JACreater20 extends JACreater {
		public JACreater20() {
			super();
		}

		public CMNamedNodeMapImpl getDeclarations(int eid) {
			switch (eid) {
				case Ids20.ID_ATTRIBUTE :
					createForAttribute();
					break;
				case Ids20.ID_ELEMENT :
					createForElement();
					break;
				case Ids20.ID_BODY :
					createForBody();
					break;
				case Ids20.ID_OUTPUT :
					createForOutput();
					break;
				case Ids.ID_DIRECTIVE_TAGLIB :
					createForDirTaglib();
					break;
				default :
					super.getDeclarations(eid);
			}
			return declarations;
		}

		private void createForBody() {
		}

		private void createForOutput() {
			AttrDecl adec = new AttrDecl(JSP20Namespace.ElementName.OUTPUT);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.ENUM);
			String[] values = {ATTR_VALUE_TRUE, ATTR_VALUE_FALSE, JSP20Namespace.ATTR_VALUE_YES, JSP20Namespace.ATTR_VALUE_NO};
			adec.type.setEnumValues(values);
			adec.type.setImpliedValue(CMDataType.IMPLIED_VALUE_DEFAULT, JSP20Namespace.ATTR_VALUE_NO);
			adec.usage = CMAttributeDeclaration.OPTIONAL;
			declarations.putNamedItem(JSP20Namespace.ElementName.OUTPUT, adec);

			adec = new AttrDecl(JSP20Namespace.ATTR_NAME_DOCTYPE_ROOT_ELEMENT);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.CDATA);
			adec.usage = CMAttributeDeclaration.OPTIONAL;
			declarations.putNamedItem(JSP20Namespace.ATTR_NAME_DOCTYPE_ROOT_ELEMENT, adec);

			adec = new AttrDecl(JSP20Namespace.ATTR_NAME_DOCTYPE_SYSTEM);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.CDATA);
			adec.usage = CMAttributeDeclaration.OPTIONAL;
			declarations.putNamedItem(JSP20Namespace.ATTR_NAME_DOCTYPE_SYSTEM, adec);

			adec = new AttrDecl(JSP20Namespace.ATTR_NAME_DOCTYPE_PUBLIC);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.CDATA);
			adec.usage = CMAttributeDeclaration.OPTIONAL;
			declarations.putNamedItem(JSP20Namespace.ATTR_NAME_DOCTYPE_PUBLIC, adec);
		}

		/**
		 * Changed in 2.0
		 */
		void createForDirTaglib() {
			// ("uri" URI OPTIONAL)
			AttrDecl adec = new AttrDecl(ATTR_NAME_URI);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.URI);
			adec.usage = CMAttributeDeclaration.OPTIONAL;
			declarations.putNamedItem(ATTR_NAME_URI, adec);

			// ("tagdir" URI OPTIONAL)
			adec = new AttrDecl(JSP20Namespace.ATTR_NAME_TAGDIR);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.URI);
			adec.usage = CMAttributeDeclaration.OPTIONAL;
			declarations.putNamedItem(JSP20Namespace.ATTR_NAME_TAGDIR, adec);

			// ("prefix" CDATA REQUIRED)
			adec = new AttrDecl(ATTR_NAME_PREFIX);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.CDATA);
			adec.usage = CMAttributeDeclaration.REQUIRED;
			declarations.putNamedItem(ATTR_NAME_PREFIX, adec);
		}
		
		private void createForElement() {
			AttrDecl adec = new AttrDecl(ATTR_NAME_NAME);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.CDATA);
			adec.usage = CMAttributeDeclaration.REQUIRED;
			declarations.putNamedItem(ATTR_NAME_NAME, adec);
		}

		private void createForAttribute() {
			AttrDecl adec = new AttrDecl(ATTR_NAME_NAME);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.CDATA);
			adec.usage = CMAttributeDeclaration.REQUIRED;
			declarations.putNamedItem(ATTR_NAME_NAME, adec);

			adec = new AttrDecl(JSP20Namespace.ATTR_NAME_TRIM);
			adec.type = new HTMLCMDataTypeImpl(CMDataType.ENUM);
			String[] values = {ATTR_VALUE_TRUE, ATTR_VALUE_FALSE};
			adec.type.setEnumValues(values);
			adec.type.setImpliedValue(CMDataType.IMPLIED_VALUE_DEFAULT, ATTR_VALUE_FALSE);
			adec.usage = CMAttributeDeclaration.OPTIONAL;
			declarations.putNamedItem(JSP20Namespace.ATTR_NAME_TRIM, adec);
		}
	}

	private static String[] names = null;

	static {
		names = new String[Ids20.getNumOfIds()];
		names[Ids.ID_SCRIPTLET] = SCRIPTLET;
		names[Ids.ID_EXPRESSION] = EXPRESSION;
		names[Ids.ID_DECLARATION] = DECLARATION;
		names[Ids.ID_DIRECTIVE_PAGE] = DIRECTIVE_PAGE;
		names[Ids.ID_DIRECTIVE_INCLUDE] = DIRECTIVE_INCLUDE;
		names[Ids.ID_DIRECTIVE_TAGLIB] = DIRECTIVE_TAGLIB;
		names[Ids.ID_USEBEAN] = USEBEAN;
		names[Ids.ID_SETPROPERTY] = SETPROPERTY;
		names[Ids.ID_GETPROPERTY] = GETPROPERTY;
		names[Ids.ID_INCLUDE] = INCLUDE;
		names[Ids.ID_FORWARD] = FORWARD;
		names[Ids.ID_PLUGIN] = PLUGIN;
		names[Ids.ID_PARAMS] = PARAMS;
		names[Ids.ID_FALLBACK] = FALLBACK;
		names[Ids.ID_PARAM] = PARAM;
		names[Ids.ID_ROOT] = ROOT;
		names[Ids.ID_TEXT] = TEXT;
		names[Ids20.ID_BODY] = JSP20Namespace.ElementName.BODY;
		names[Ids20.ID_ATTRIBUTE] = JSP20Namespace.ElementName.ATTRIBUTE;
		names[Ids20.ID_ELEMENT] = JSP20Namespace.ElementName.ELEMENT;
		names[Ids20.ID_OUTPUT] = JSP20Namespace.ElementName.OUTPUT;
	}

	/**
	 */
	public JSP20ElementCollection() {
		super(JSP20ElementCollection.names, TOLERANT_CASE);
	}

	/**
	 * @param eid
	 *            int
	 */
	CMGroupImpl createContent(int eid) {
		if (eid == ID_UNKNOWN)
			return null;

		CMGroupImpl content = null;
		CMNode child = null;

		switch (eid) {
			case Ids.ID_ROOT :
				content = new CMGroupImpl(CMGroup.CHOICE, 0, CMContentImpl.UNBOUNDED);
				int validChildren[] = {
				// %Directives;
							Ids.ID_TEXT, Ids.ID_DIRECTIVE_PAGE, Ids.ID_DIRECTIVE_INCLUDE, Ids20.ID_BODY, Ids20.ID_ATTRIBUTE,
							// %Scripts;
							Ids.ID_SCRIPTLET, Ids.ID_DECLARATION, Ids.ID_EXPRESSION,
							// %Actions;
							Ids.ID_USEBEAN, Ids.ID_SETPROPERTY, Ids.ID_GETPROPERTY, Ids.ID_INCLUDE, Ids.ID_FORWARD, Ids.ID_PLUGIN};
				for (int i = 0; i < validChildren.length; i++) {
					child = item(validChildren[i]);
					if (child != null)
						content.appendChild(child);
				}
				break;
			default :
				content = super.createContent(eid);
				break;
		}

		return content;
	}

	/**
	 * @param eid
	 *            int
	 */
	HTMLElementDeclaration createElemDecl(int eid) {
		if (eid == ID_UNKNOWN)
			return null;

		TypePacket packet = new TypePacket();
		switch (eid) {
			case Ids20.ID_BODY :
				// declaration
				packet.name = JSP20Namespace.ElementName.BODY;
				packet.content = CMElementDeclaration.CDATA;
				packet.layout = HTMLElementDeclaration.LAYOUT_OBJECT;
				packet.indentChild = true;
				packet.format = HTMLElementDeclaration.FORMAT_JSP_SCRIPT;
				break;
			case Ids20.ID_ELEMENT :
				// declaration
				packet.name = JSP20Namespace.ElementName.ELEMENT;
				packet.content = CMElementDeclaration.CDATA;
				packet.layout = HTMLElementDeclaration.LAYOUT_OBJECT;
				packet.indentChild = true;
				packet.format = HTMLElementDeclaration.FORMAT_JSP_SCRIPT;
				break;
			case Ids20.ID_ATTRIBUTE :
				// declaration
				packet.name = JSP20Namespace.ElementName.ATTRIBUTE;
				packet.content = CMElementDeclaration.CDATA;
				packet.layout = HTMLElementDeclaration.LAYOUT_OBJECT;
				packet.indentChild = true;
				packet.format = HTMLElementDeclaration.FORMAT_JSP_SCRIPT;
				break;
			case Ids20.ID_OUTPUT :
				// declaration
				packet.name = JSP20Namespace.ElementName.OUTPUT;
				packet.content = CMElementDeclaration.CDATA;
				packet.layout = HTMLElementDeclaration.LAYOUT_OBJECT;
				packet.indentChild = true;
				packet.format = HTMLElementDeclaration.FORMAT_JSP_SCRIPT;
				break;
			case Ids.ID_DIRECTIVE_TAGLIB :
				// directive.taglib
				packet.name = DIRECTIVE_TAGLIB;
				packet.omit = HTMLElementDeclaration.OMIT_END;
				packet.layout = HTMLElementDeclaration.LAYOUT_HIDDEN;
				packet.format = HTMLElementDeclaration.FORMAT_JSP_DIRECTIVE;
				break;
			default :
				return super.createElemDecl(eid);
		}
		ElemDecl decl = new ElemDecl(packet);

		CMGroupImpl content = createContent(eid);
		if (content != null)
			decl.setContent(content);

		JACreater20 creater = new JACreater20();
		decl.setAttributes(creater.getDeclarations(eid));

		return decl;
	}
}