com.foc.desc.parsers.xml.FocDescDeclaration_XMLBased.java Source code

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Here is the source code for com.foc.desc.parsers.xml.FocDescDeclaration_XMLBased.java

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/*******************************************************************************
 * Copyright 2016 Antoine Nicolas SAMAHA
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.foc.desc.parsers.xml;

import java.io.InputStream;
import java.lang.reflect.Constructor;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import com.foc.Globals;
import com.foc.IFocDescDeclaration;
import com.foc.desc.FocDesc;
import com.foc.desc.FocModule;
import com.foc.util.Utils;
import com.vaadin.server.ClassResource;

public class FocDescDeclaration_XMLBased implements IFocDescDeclaration {

    private FocModule module = null;
    private Class<XMLFocDesc> descClass = null;
    private Class<XMLFocObject> objClass = null;
    private String xmlFileName = null;
    private String name = null;
    private String storageName = null;
    private XMLFocDesc focDesc = null;

    public FocDescDeclaration_XMLBased(FocModule module, String name, String storageName, String xmlFileName,
            Class<XMLFocDesc> descClass, Class<XMLFocObject> objClass) {
        this.name = name;
        this.module = module;
        this.xmlFileName = xmlFileName;
        this.descClass = descClass;
        this.objClass = objClass;
        this.storageName = storageName;
    }

    @Override
    public FocModule getFocModule() {
        return module;
    }

    @Override
    public int getPriority() {
        return IFocDescDeclaration.PRIORITY_FIRST;
    }

    public String getName() {
        return name;
    }

    @Override
    public FocDesc getFocDescription() {
        if (focDesc == null) {
            focDesc = parse();
            if (focDesc != null)
                focDesc.afterParsing();
        }
        return focDesc;
    }

    public XMLFocDesc newFocDesc(String forcedStorageName) {
        if (!Utils.isStringEmpty(forcedStorageName)) {
            storageName = forcedStorageName;
        }
        try {
            if (descClass != null) {
                Class[] clss = new Class[4];
                Object[] args = new Object[4];
                {
                    clss[0] = FocModule.class;
                    args[0] = getFocModule();

                    clss[1] = String.class;
                    args[1] = storageName;

                    clss[2] = String.class;
                    args[2] = xmlFileName;

                    clss[3] = Class.class;
                    args[3] = objClass;
                }
                Constructor<XMLFocDesc> methodGetFocDesc = null;
                try {
                    methodGetFocDesc = descClass.getConstructor(clss);
                } catch (NoSuchMethodException e) {
                    Globals.logException(e);
                }
                if (methodGetFocDesc != null) {
                    focDesc = (XMLFocDesc) methodGetFocDesc.newInstance(args);
                    focDesc.setName(name);

                    Globals.getApp().putIFocDescDeclaration(name, this);
                }
            }
        } catch (Exception e) {
            Globals.logString("Exception while getting FocDesc for class : " + descClass.getName());
            Globals.logException(e);
        }
        return focDesc;
    }

    private XMLFocDesc parse() {
        XMLFocDesc xmlFocDesc = null;
        try {
            ClassResource resource = null;
            InputStream inputStream = null;
            resource = new ClassResource(xmlFileName);
            inputStream = resource.getStream().getStream();

            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser saxParser = factory.newSAXParser();

            XMLFocDescParser focDescParser = new XMLFocDescParser(this);

            saxParser.parse(inputStream, focDescParser);
            xmlFocDesc = focDescParser.getXmlFocDesc();
        } catch (Exception e) {
            Globals.logString("Could not load file : " + xmlFileName);
            Globals.logException(e);
        }
        return xmlFocDesc;
    }
}