fi.jasoft.dragdroplayouts.demo.DemoView.java Source code

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Here is the source code for fi.jasoft.dragdroplayouts.demo.DemoView.java

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/*
 * Copyright 2015 John Ahlroos
 * 
 * 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 fi.jasoft.dragdroplayouts.demo;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import com.vaadin.navigator.Navigator;
import com.vaadin.navigator.View;
import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
import com.vaadin.ui.Component;
import com.vaadin.ui.CustomComponent;

public abstract class DemoView extends CustomComponent implements View {

    private final Navigator navigator;

    public DemoView(Navigator navigator) {
        this.navigator = navigator;
        setSizeFull();
        setCompositionRoot(getLayout());
    }

    @Override
    public void enter(ViewChangeEvent event) {
    }

    public String getSource() {
        String path = getClass().getCanonicalName().replaceAll("\\.", "/") + ".java";

        InputStream is = getClass().getClassLoader().getResourceAsStream(path);
        if (is == null) {
            return "No source code available.";
        }

        BufferedReader reader = new BufferedReader(new InputStreamReader(is));

        try {

            boolean inCodeBlock = false;

            StringBuilder codelines = new StringBuilder();
            String line = reader.readLine();
            while (line != null) {
                if (line.contains("// start-source")) {
                    inCodeBlock = true;
                } else if (line.contains("// end-source")) {
                    inCodeBlock = false;
                } else if (inCodeBlock) {
                    codelines.append(line);
                    codelines.append("\n");
                }
                line = reader.readLine();
            }

            reader.close();

            String code = codelines.toString();

            return code;
        } catch (IOException e) {
            return "No source code available.";
        }
    }

    public abstract Component getLayout();

    public abstract String getCaption();

    public abstract String getName();

}