/*
 * FindBugs - Find Bugs in Java programs
 * Copyright (C) 2006, University of Maryland
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs.classfile.impl;

import java.io.IOException;

import edu.umd.cs.findbugs.classfile.ICodeBase;
import edu.umd.cs.findbugs.classfile.ICodeBaseLocator;
import edu.umd.cs.findbugs.classfile.ResourceNotFoundException;

/**
 * Codebase locator for a zip/jar archive nested inside a parent codebase.
 * 
 * @author David Hovemeyer
 */
public class NestedZipFileCodeBaseLocator implements ICodeBaseLocator {
	private final ICodeBase parentCodeBase;
	private final String resourceName;

	public NestedZipFileCodeBaseLocator(ICodeBase parentCodeBase, String resourceName) {
		this.parentCodeBase = parentCodeBase;
		this.resourceName = resourceName;
	}

	/**
	 * @return Returns the parentCodeBase.
	 */
	public ICodeBase getParentCodeBase() {
		return parentCodeBase;
	}

	/**
	 * @return Returns the resourceName.
	 */
	public String getResourceName() {
		return resourceName;
	}

	/* (non-Javadoc)
	 * @see edu.umd.cs.findbugs.classfile.ICodeBaseLocator#createRelativeCodeBaseLocator(java.lang.String)
	 */
	public ICodeBaseLocator createRelativeCodeBaseLocator(String relativePath) {
		// The relative path indicates another codebase (archive) in the same parent codebase
		return new NestedZipFileCodeBaseLocator(parentCodeBase, relativePath);
	}

	/* (non-Javadoc)
	 * @see edu.umd.cs.findbugs.classfile.ICodeBaseLocator#openCodeBase()
	 */
	public ICodeBase openCodeBase() throws ResourceNotFoundException, IOException {
		return ClassFactory.createNestedZipFileCodeBase(this);
	}

	/* (non-Javadoc)
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		return "nested:[" + parentCodeBase.getCodeBaseLocator() + "]" + resourceName;
	}

	/* (non-Javadoc)
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	@Override
	public boolean equals(Object obj) {
		if (obj == null || obj.getClass() != this.getClass()) {
			return false;
		}
		NestedZipFileCodeBaseLocator other = (NestedZipFileCodeBaseLocator) obj;
		return this.parentCodeBase.equals(other.parentCodeBase)
			&& this.resourceName.equals(other.resourceName);
	}

	/* (non-Javadoc)
	 * @see java.lang.Object#hashCode()
	 */
	@Override
	public int hashCode() {
		return 7919 * parentCodeBase.hashCode() + resourceName.hashCode();
	}
}