org.pentaho.platform.pdi.AgileBiPluginResourceLoader.java Source code

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Here is the source code for org.pentaho.platform.pdi.AgileBiPluginResourceLoader.java

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/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright (c) 2016 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.platform.pdi;

import org.apache.commons.io.IOUtils;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleReference;
import org.pentaho.platform.api.engine.IPluginResourceLoader;
import org.pentaho.platform.util.messages.LocaleHelper;

import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.ResourceBundle;

/**
 * Created by nbaker on 8/15/16.
 */
public class AgileBiPluginResourceLoader implements IPluginResourceLoader {
    @Override
    public byte[] getResourceAsBytes(Class<? extends Object> aClass, String s) {
        try {
            return IOUtils.toByteArray(this.getResourceAsStream(aClass, s));
        } catch (IOException e) {
            return null;
        } catch (NullPointerException e) {
            return null;
        }
    }

    @Override
    public String getResourceAsString(Class<? extends Object> aClass, String s)
            throws UnsupportedEncodingException {
        return getResourceAsString(aClass, s, "UTF-8");
    }

    protected String getSymbolicName(Class<?> aClass) {
        return getSymbolicName(aClass.getClassLoader());
    }

    protected String getSymbolicName(ClassLoader classLoader) {
        if (classLoader instanceof BundleReference) {
            Bundle bundle = BundleReference.class.cast(classLoader).getBundle();
            return bundle.getSymbolicName();
        } else {
            return null;
        }
    }

    @Override
    public String getResourceAsString(Class<? extends Object> aClass, String s, String s1)
            throws UnsupportedEncodingException {
        try {
            return IOUtils.toString(getResourceAsStream(aClass, s), s1);
        } catch (IOException e) {
            return null;
        } catch (NullPointerException e) {
            return null;
        }
    }

    @Override
    public InputStream getResourceAsStream(Class<?> aClass, String s) {
        String symbolicName = getSymbolicName(aClass);
        return aClass.getResourceAsStream("/" + symbolicName + "/" + s);
    }

    @Override
    public InputStream getResourceAsStream(ClassLoader classLoader, String s) {
        String symbolicName = getSymbolicName(classLoader);
        return classLoader.getResourceAsStream(symbolicName + "/" + s);
    }

    @Override
    public List<URL> findResources(Class<?> aClass, String s) {
        return findResources(aClass.getClassLoader(), s);
    }

    @Override
    public List<URL> findResources(ClassLoader classLoader, String s) {
        String symbolicName = getSymbolicName(classLoader);
        try {
            Enumeration<URL> enumeration = classLoader.getResources(symbolicName + "/" + s);
            List<URL> urls = new ArrayList<URL>();
            while (enumeration.hasMoreElements()) {
                URL nextElement = enumeration.nextElement();
                urls.add(nextElement);
            }
            return urls;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return Collections.emptyList();
    }

    @Override
    public ResourceBundle getResourceBundle(Class<?> aClass, String s) {
        return ResourceBundle.getBundle(getSymbolicName(aClass) + "/" + s, LocaleHelper.getLocale(),
                aClass.getClassLoader());
    }

    // ============ These have no analogous counterpart in OSGI yet ===================
    @Override
    public String getPluginSetting(Class<?> aClass, String s) {
        return null;
    }

    @Override
    public String getPluginSetting(Class<?> aClass, String s, String s1) {
        return null;
    }

    @Override
    public String getPluginSetting(ClassLoader classLoader, String s, String s1) {
        return null;
    }
}