Copyright (c) 2000, 2015 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2015 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.core;

import java.util.zip.ZipFile;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.PlatformObject;
import org.eclipse.jdt.core.IJarEntryResource;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.internal.core.util.Util;

public abstract class JarEntryResource  extends PlatformObject implements IJarEntryResource {

	protected Object parent;
	protected String simpleName;

	public JarEntryResource(String simpleName) {
		this.simpleName = simpleName;
	}

	public abstract JarEntryResource clone(Object newParent);

	@Override
	public boolean equals(Object obj) {
		if (! (obj instanceof JarEntryResource))
			return false;
		JarEntryResource other = (JarEntryResource) obj;
		return this.parent.equals(other.parent) && this.simpleName.equals(other.simpleName);
	}

	protected String getEntryName() {
		String parentEntryName;
		if (this.parent instanceof IPackageFragment) {
			String elementName = ((IPackageFragment) this.parent).getElementName();
			parentEntryName = elementName.length() == 0 ? "" : elementName .replace('.', '/') + '/'; //$NON-NLS-1$
		} else if (this.parent instanceof IPackageFragmentRoot) {
			parentEntryName = ""; //$NON-NLS-1$
		} else {
			parentEntryName = ((JarEntryDirectory) this.parent).getEntryName() + '/';
		}
		return parentEntryName + this.simpleName;
	}

	@Override
	public IPath getFullPath() {
		return new Path(getEntryName()).makeAbsolute();
	}

	@Override
	public String getName() {
		return this.simpleName;
	}

	@Override
	public Object getParent() {
		return this.parent;
	}

	@Override
	public IPackageFragmentRoot getPackageFragmentRoot() {
		if (this.parent instanceof IPackageFragment) {
			return (IPackageFragmentRoot) ((IPackageFragment) this.parent).getParent();
		} else if (this.parent instanceof IPackageFragmentRoot) {
			return (IPackageFragmentRoot) this.parent;
		} else {
			return ((JarEntryDirectory) this.parent).getPackageFragmentRoot();
		}
	}

	protected ZipFile getZipFile() throws CoreException {
		if (this.parent instanceof IPackageFragment) {
			JarPackageFragmentRoot root = (JarPackageFragmentRoot) ((IPackageFragment) this.parent).getParent();
			return root.getJar();
		} else if (this.parent instanceof JarPackageFragmentRoot) {
			return ((JarPackageFragmentRoot) this.parent).getJar();
		} else
			return ((JarEntryDirectory) this.parent).getZipFile();
	}

	@Override
	public int hashCode() {
		return Util.combineHashCodes(this.simpleName.hashCode(), this.parent.hashCode());
	}

	@Override
	public boolean isReadOnly() {
		return true;
	}

	public void setParent(Object parent) {
		this.parent = parent;
	}
}