org.granite.scan.AbstractScannedItem Maven / Gradle / Ivy

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/*
  GRANITE DATA SERVICES
  Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.

  This file is part of Granite Data Services.

  Granite Data Services is free software; you can redistribute it and/or modify
  it under the terms of the GNU Library General Public License as published by
  the Free Software Foundation; either version 2 of the License, or (at your
  option) any later version.

  Granite Data Services 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 Library General Public License
  for more details.

  You should have received a copy of the GNU Library General Public License
  along with this library; if not, see .
*/

package org.granite.scan;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * @author Franck WOLFF
 */
public abstract class AbstractScannedItem implements ScannedItem {

    private final Scanner scanner;
    private final ScannedItem marker;

    private Class clazz = null;
    private Properties properties = null;

    public AbstractScannedItem(Scanner scanner, ScannedItem marker) {
        this.scanner = scanner;
        this.marker = marker;
    }

    public ScannedItem getMarker() {
        return marker;
    }

    public Scanner getScanner() {
        return scanner;
    }

    public String getExtension() {
        String name = getName();
        int lastDot = name.indexOf('.');
        return lastDot >= 0 ? name.substring(lastDot + 1) : null;
    }

    public String getClassName() {
        if (!"class".equals(getExtension()))
            throw new RuntimeException("Not a valid class name: " + getAbsolutePath());
        return getRelativePath().substring(0, getRelativePath().length() - 6).replace('/', '.');
    }

    public byte[] getContent() throws IOException {
        long size = getSize();
        if (size > Integer.MAX_VALUE)
            throw new IOException("Size over Integer.MAX_VALUE: " + size);

        InputStream is = null;
        try {
            is = getInputStream();
            byte[] data = new byte[(int)size];
            is.read(data);
            return data;
        } finally {
            if (is != null)
                is.close();
        }
    }

    public Class loadAsClass() throws ClassNotFoundException, IOException, ClassFormatError {
        if (clazz == null) {
            ClassLoader loader = scanner.getLoader();
            if (loader instanceof ScannedItemClassLoader)
                clazz = ((ScannedItemClassLoader)loader).loadClass(this);
            else
                clazz = loader.loadClass(getClassName());
        }
        return clazz;
    }

    public Properties loadAsProperties() throws IOException, IllegalArgumentException {
        if (properties == null) {
            InputStream is = null;
            try {
                is = getInputStream();
                properties = new Properties();
                properties.load(getInputStream());
            } finally {
                if (is != null)
                    is.close();
            }
        }
        return properties;
    }

    @Override
    public String toString() {
        if (marker != null)
            return getAbsolutePath() + " [marker=" + marker + "]";
        return getAbsolutePath();
    }
}