org.eclipse.scada.configuration.item.parser.ScriptResourceImpl.java Source code

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Here is the source code for org.eclipse.scada.configuration.item.parser.ScriptResourceImpl.java

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/*******************************************************************************
 * Copyright (c) 2013 IBH SYSTEMS GmbH 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:
 *     IBH SYSTEMS GmbH - initial API and implementation
 *******************************************************************************/
package org.eclipse.scada.configuration.item.parser;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.Map;

import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.impl.ResourceImpl;

import com.google.common.io.CharStreams;

public abstract class ScriptResourceImpl extends ResourceImpl {
    protected final String fileExtension;

    protected final String defaultCharacterSet;

    protected final String scriptEngine;

    public ScriptResourceImpl(final URI uri, final String scriptEngine, final String fileExtension,
            final String defaultCharacterSet) {
        super(uri);

        this.scriptEngine = scriptEngine;
        this.fileExtension = fileExtension;
        this.defaultCharacterSet = defaultCharacterSet;
    }

    protected abstract void write(final OutputStreamWriter writer) throws IOException;

    protected abstract EObject parse(final String data);

    @Override
    protected void doLoad(final InputStream inputStream, final Map<?, ?> options) throws IOException {
        try {
            final String data = CharStreams.toString(new InputStreamReader(inputStream, this.defaultCharacterSet));
            getContents().add(parse(data));
        } finally {
            inputStream.close();
        }
    }

    @Override
    protected void doSave(final OutputStream outputStream, final Map<?, ?> options) throws IOException {
        try {
            try (final OutputStreamWriter writer = new OutputStreamWriter(outputStream, this.defaultCharacterSet)) {
                write(writer);
            }
        } finally {
            outputStream.close();
        }
    }

}