net.sf.gluebooster.java.booster.basic.resources.MemoryResourceSystem Maven / Gradle / Ivy

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package net.sf.gluebooster.java.booster.basic.resources;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import net.sf.gluebooster.java.booster.essentials.container.ResourceSystem;
import net.sf.gluebooster.java.booster.essentials.utils.Check;

/**
 * Only in memory storage, no storage on external systems like file systems.
 * 
 * @author CBauer
 *
 */
public class MemoryResourceSystem implements ResourceSystem{

	/**
	 * Stores the resources in ByteArrayOutputStream.
	 */
	private Map storage = new HashMap();
	
	
	
	public Map getStorage() {
		return storage;
	}

	public void setStorage(Map storage) {
		this.storage = storage;
	}

	/**
	 * Supports every id.
	 */
	@Override
	public boolean isResourceIDSupported(Object resourceID) {
		return true;
	}

	@Override
	public OutputStream getOutputStream(Object resourceID) throws Exception {
		ByteArrayOutputStream result = new ByteArrayOutputStream();
		storage.put(resourceID.toString(), result);
		return result;

	}

	@Override
	public InputStream getInputStream(Object resourceID) throws Exception {
		return new ByteArrayInputStream(storage.get(resourceID.toString()).toByteArray());
		
	}

	@Override
	public URL getUrl(Object resourceID)throws Exception{
		throw new UnsupportedOperationException();
	}

	@Override
	public boolean isWritable() {
		return true;
	}
	 
	@Override
	public Object createDirectory(Object parentResourceId, Object newResourceId)
			throws Exception {
		Check.notNull(newResourceId, "newResourceId");

		String result = null;
		if (parentResourceId != null)
			result = parentResourceId.toString();

		result += newResourceId;

		return result;

	}

	@Override
	public String toString() {
		
		return "This MemoryResourceSystem contains the following files: " + storage.keySet();
	}
	
}