ZipContainerSource.java

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package com.adobe.dp.epub.io;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Vector;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;

public class ZipContainerSource extends ContainerSource {

	ZipFile zip;
	Vector entryList;

	public ZipContainerSource(File zip) throws ZipException, IOException {
		this.zip = new ZipFile(zip);
	}

	class DataSourceImpl extends DataSource {

		ZipEntry entry;
		
		DataSourceImpl(ZipEntry entry) {
			this.entry = entry;
		}

		public InputStream getInputStream() throws IOException {
			return zip.getInputStream(entry);
		}

	}
	
	public void close() throws IOException {
		zip.close();
	}

	public DataSource getDataSource(String name) {
		ZipEntry entry = zip.getEntry(name);
		if (entry == null)
			return null;
		return new DataSourceImpl(entry);
	}

	public Iterator getResourceList() {
		if( entryList == null ) {
			entryList = new Vector();
			Enumeration entries = zip.entries();
			while( entries.hasMoreElements() )
			{
				ZipEntry entry = (ZipEntry)entries.nextElement();
				String name = entry.getName();
				entryList.add(name);
			}
		}
		return entryList.iterator();
	}
	
}