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/*******************************************************************************
* Copyright (c) 2009, 2013 VMware Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
* and the Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php.
* You may elect to redistribute this code under either of these licenses.
*
* Contributors:
* VMware Inc. - initial contribution
*******************************************************************************/
package org.eclipse.gemini.web.tomcat.internal.loading;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import javax.naming.directory.Attributes;
import org.apache.naming.resources.ResourceAttributes;
/**
* {@link BundleEntryAttributes} provides the default {@link Attributes} for a {@link BundleEntry}.
*/
final class BundleEntryAttributes extends ResourceAttributes {
private static final int CREATION_DATE_UNKNOWN = 0;
private static final long TIME_NOT_SET = -1L;
private static final long CONTENT_LENGTH_NOT_SET = -1L;
private static final long serialVersionUID = 7799793247259935763L;
private final transient BundleEntry bundleEntry;
private final String[] attrIds;
/**
* Creates a {@link BundleEntryAttributes} for the given {@link BundleEntry} and attribute identifier array.
*
* @param bundleEntry the <code>BundleEntry</code> from which to retrieve attributes
* @param attrIds the identifiers of the attributes to retrieve, or <code>null</code> if all attributes should be
* retrieved
*/
BundleEntryAttributes(BundleEntry bundleEntry, String[] attrIds, URL url) {
this.bundleEntry = bundleEntry;
this.attrIds = attrIds;
getName();
if (url != null) {
setCollection(BundleEntry.isDirectory(url));
}
URLConnection urlConnection = getBundleEntryURLConnection(url);
if (urlConnection != null) {
long lastModified = getLastModified(urlConnection);
getCreation(urlConnection, lastModified);
getContentLength(urlConnection);
}
}
/**
* {@inheritDoc}
*/
@Override
public long getCreation() {
return getCreation(null, TIME_NOT_SET);
}
private long getCreation(URLConnection urlConnection, long lastModified) {
long creation = TIME_NOT_SET;
if (attrPresent(CREATION_DATE) || attrPresent(ALTERNATE_CREATION_DATE)) {
creation = super.getCreation();
if (creation == TIME_NOT_SET) {
if (urlConnection == null) {
urlConnection = getBundleEntryURLConnection(this.bundleEntry.getURL());
}
if (urlConnection != null) {
creation = determineDate(urlConnection);
if (creation == CREATION_DATE_UNKNOWN) {
if (lastModified == TIME_NOT_SET) {
lastModified = determineLastModified(urlConnection);
}
creation = lastModified;
}
}
if (creation != TIME_NOT_SET) {
setCreation(creation);
}
}
}
return creation;
}
private long determineDate(URLConnection urlConnection) {
return urlConnection.getDate();
}
private boolean attrPresent(String attrId) {
if (this.attrIds == null) {
return true;
}
for (String ai : this.attrIds) {
if (ai.equals(attrId)) {
return true;
}
}
return false;
}
/**
* {@inheritDoc}
*/
@Override
public long getLastModified() {
return getLastModified(null);
}
private long getLastModified(URLConnection urlConnection) {
long lastModified = TIME_NOT_SET;
if (attrPresent(LAST_MODIFIED) || attrPresent(ALTERNATE_LAST_MODIFIED)) {
lastModified = super.getLastModified();
if (lastModified == TIME_NOT_SET) {
if (urlConnection == null) {
urlConnection = getBundleEntryURLConnection(this.bundleEntry.getURL());
}
if (urlConnection != null) {
lastModified = determineLastModified(urlConnection);
}
if (lastModified != TIME_NOT_SET) {
setLastModified(lastModified);
}
}
}
return lastModified;
}
private long determineLastModified(URLConnection urlConnection) {
return urlConnection.getLastModified();
}
/**
* {@inheritDoc}
*/
@Override
public String getName() {
if (!attrPresent(NAME)) {
return null;
}
String name = super.getName();
if (name == null) {
name = this.bundleEntry.getName();
}
return name;
}
@Override
public long getContentLength() {
return getContentLength(null);
}
private long getContentLength(URLConnection urlConnection) {
long contentLength = CONTENT_LENGTH_NOT_SET;
if (attrPresent(CONTENT_LENGTH) || attrPresent(ALTERNATE_CONTENT_LENGTH)) {
contentLength = super.getContentLength();
if (contentLength == CONTENT_LENGTH_NOT_SET) {
if (urlConnection == null) {
urlConnection = getBundleEntryURLConnection(this.bundleEntry.getURL());
}
contentLength = determineContentLength(urlConnection);
if (contentLength != CONTENT_LENGTH_NOT_SET) {
setContentLength(contentLength);
}
}
}
return contentLength;
}
private long determineContentLength(URLConnection urlConnection) {
return this.bundleEntry.getContentLength(urlConnection);
}
private URLConnection getBundleEntryURLConnection(URL url) {
try {
if (url != null) {
return url.openConnection();
} else {
return null;
}
} catch (IOException e) {
return null;
}
}
}
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