com.foc.helpBook.FocHelpPage.java Source code

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Here is the source code for com.foc.helpBook.FocHelpPage.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.helpBook;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import com.foc.Globals;
import com.foc.IFocEnvironment;
import com.vaadin.server.ClassResource;

public class FocHelpPage {

    private String pageCode = null;
    private String fileName = null;

    public FocHelpPage(String pageCode, String fileName) {
        this.fileName = fileName;
        this.pageCode = pageCode;
    }

    public void setFileName(String fileName) {
        this.fileName = fileName;
    }

    public String getFileName() {
        return fileName;
    }

    public String getPageCode() {
        return pageCode;
    }

    public void setPageCode(String pageCode) {
        this.pageCode = pageCode;
    }

    public String getHelpMessage() {
        String message = null;
        if (message == null) {
            try {
                InputStream xmlFileStream = getXMLStream();
                if (xmlFileStream != null) {
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    byte[] buffer = new byte[1024];
                    int length = 0;
                    while ((length = xmlFileStream.read(buffer)) != -1) {
                        baos.write(buffer, 0, length);
                    }
                    message = new String(baos.toByteArray());

                    xmlFileStream.close();
                    xmlFileStream = null;
                }
            } catch (Exception e) {
                Globals.logException(e);
            }
        }
        return message;
    }

    private InputStream getXMLStream() {
        InputStream inputStream = null;
        ClassResource resource = null;
        try {
            if (fileName != null && !fileName.isEmpty()) {
                resource = new ClassResource(fileName);
                inputStream = resource.getStream().getStream();
            }
        } catch (Exception e) {
            Globals.logString("Could not load file : " + fileName);
            Globals.logException(e);
        }

        if (inputStream == null) {
            Globals.showNotification("Could not load help page " + fileName, " for page code" + pageCode,
                    IFocEnvironment.TYPE_ERROR_MESSAGE);
        }

        return inputStream;
    }
}