/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.lucene.gdata.gom.core.utils;
import java.math.BigDecimal;
import java.util.Calendar;
import java.util.List;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.lucene.gdata.gom.ContentType;
import org.apache.lucene.gdata.gom.GOMAttribute;
import org.apache.lucene.gdata.gom.GOMLink;
import org.apache.lucene.gdata.gom.GOMNamespace;
import org.apache.lucene.gdata.gom.core.GDataParseException;
import org.apache.lucene.gdata.gom.core.GOMAttributeImpl;
/**
* @author Simon Willnauer
*
*/
public class GOMUtils {
/*
* Possible values 2003-12-13T18:30:02Z 2003-12-13T18:30:02.25Z
* 2003-12-13T18:30:02+01:00 2003-12-13T18:30:02.25+01:00
*/
private static final Pattern RFC3339_DATE_PATTERN = Pattern.compile(
"(\\d\\d\\d\\d)" + // #YEAR
"\\-(\\d\\d)" + // #MONTH
"\\-(\\d\\d)[Tt]" + // #DAY
"(\\d\\d)" + // #HOURS
":(\\d\\d)" + // #MINUTES
":(\\d\\d)" + // #SECONDS
"(\\.(\\d+))?" + // #MILLISorless
"([Zz]|((\\+|\\-)(\\d\\d):(\\d\\d)))?"// #TIMEZONESHIFT
, Pattern.COMMENTS);
static final String ATTRIBUTE_TYPE = "type";
static final GOMAttribute TEXT_TYPE;
static final GOMAttribute HTML_TYPE;
static final GOMAttribute XHTML_TYPE;
static final GOMAttribute TEXT_TYPE_DEFAULT_NS;
static final GOMAttribute HTML_TYPE_DEFAULT_NS;
static final GOMAttribute XHTML_TYPE_DEFAULT_NS;
static {
TEXT_TYPE = new GOMAttributeImpl(GOMNamespace.ATOM_NS_URI,
GOMNamespace.ATOM_NS_PREFIX, ATTRIBUTE_TYPE, ContentType.TEXT
.name().toLowerCase());
HTML_TYPE = new GOMAttributeImpl(GOMNamespace.ATOM_NS_URI,
GOMNamespace.ATOM_NS_PREFIX, ATTRIBUTE_TYPE, ContentType.HTML
.name().toLowerCase());
XHTML_TYPE = new GOMAttributeImpl(GOMNamespace.ATOM_NS_URI,
GOMNamespace.ATOM_NS_PREFIX, ATTRIBUTE_TYPE, ContentType.XHTML
.name().toLowerCase());
TEXT_TYPE_DEFAULT_NS = new GOMAttributeImpl(ATTRIBUTE_TYPE,
ContentType.TEXT.name().toLowerCase());
HTML_TYPE_DEFAULT_NS = new GOMAttributeImpl(ATTRIBUTE_TYPE,
ContentType.HTML.name().toLowerCase());
XHTML_TYPE_DEFAULT_NS = new GOMAttributeImpl(ATTRIBUTE_TYPE,
ContentType.XHTML.name().toLowerCase());
}
/**
* @param type
* @return
*/
public static GOMAttribute getAttributeByContentType(ContentType type) {
switch (type) {
case HTML:
return HTML_TYPE;
case XHTML:
return XHTML_TYPE;
default:
return TEXT_TYPE;
}
}
/**
* @param type
* @return
*/
public static GOMAttribute getAttributeByContentTypeDefaultNs(
ContentType type) {
if (type == null)
return TEXT_TYPE_DEFAULT_NS;
switch (type) {
case HTML:
return HTML_TYPE_DEFAULT_NS;
case XHTML:
return XHTML_TYPE_DEFAULT_NS;
default:
return TEXT_TYPE_DEFAULT_NS;
}
}
/**
* Builds a atom namespace attribute
*
* @param aValue
* attribute value
* @param aName
* attribute name
* @return a GOMAttribute
*/
public static GOMAttribute buildAtomAttribute(String aValue, String aName) {
return new GOMAttributeImpl(GOMNamespace.ATOM_NS_URI,
GOMNamespace.ATOM_NS_PREFIX, aName, aValue);
}
/**
* @param aValue
* @param aName
* @return
*/
public static GOMAttribute buildDefaultNamespaceAttribute(String aValue,
String aName) {
return new GOMAttributeImpl(aName, aValue);
}
/**
* @param aValue
* @param aName
* @return
*/
public static GOMAttribute buildXMLNamespaceAttribute(String aValue,
String aName) {
return new GOMAttributeImpl(GOMNamespace.XML_NS_URI,
GOMNamespace.XML_NS_PREFIX, aName, aValue);
}
/**
* @param aString
* @return
*/
public static boolean isRfc3339DateFormat(String aString) {
Matcher aMatcher = RFC3339_DATE_PATTERN.matcher(aString);
return aMatcher.matches();
}
/**
* @param aString
* @return
*/
public static long parseRfc3339DateFormat(String aString) {
if (aString == null)
throw new IllegalArgumentException(
"Date-Time String must not be null");
Matcher aMatcher = RFC3339_DATE_PATTERN.matcher(aString);
if (!aMatcher.matches()) {
throw new GDataParseException(
"Invalid RFC3339 date / time pattern -- " + aString);
}
int grCount = aMatcher.groupCount();
if (grCount > 13)
throw new GDataParseException(
"Invalid RFC3339 date / time pattern -- " + aString);
Integer timeZoneShift = null;
Calendar dateTime = null;
try {
if (aMatcher.group(9) == null) {
// skip time zone
} else if (aMatcher.group(9).equalsIgnoreCase("Z")) {
timeZoneShift = new Integer(0);
} else {
timeZoneShift = new Integer((Integer
.valueOf(aMatcher.group(12)) * 60 + Integer
.valueOf(aMatcher.group(13))));
if (aMatcher.group(11).equals("-")) {
timeZoneShift = new Integer(-timeZoneShift.intValue());
}
}
dateTime = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
;
dateTime.clear();
dateTime.set(Integer.valueOf(aMatcher.group(1)), Integer
.valueOf(aMatcher.group(2)) - 1, Integer.valueOf(aMatcher
.group(3)), Integer.valueOf(aMatcher.group(4)), Integer
.valueOf(aMatcher.group(5)), Integer.valueOf(aMatcher
.group(6)));
// seconds with milliseconds
if (aMatcher.group(8) != null && aMatcher.group(8).length() > 0) {
dateTime.set(Calendar.MILLISECOND, new BigDecimal("0."/*
* use
* big
* dec
* this
* could
* be
* big!!
*/
+ aMatcher.group(8)).movePointRight(3).intValue());
}
} catch (NumberFormatException e) {
throw new GDataParseException(
"Invalid RFC3339 date / time pattern -- " + aString, e);
}
long retVal = dateTime.getTimeInMillis();
if (timeZoneShift != null) {
retVal -= timeZoneShift.intValue() * 60000;
}
return retVal;
}
/**
* @param aMillisecondLong
* @return
*/
public static String buildRfc3339DateFormat(long aMillisecondLong) {
Calendar instance = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
instance.setTimeInMillis(aMillisecondLong);
StringBuilder builder = new StringBuilder();
// 2003-12-13T18:30:02.25+01:00
int time = 0;
time = instance.get(Calendar.YEAR);
if (time < 1000)
builder.append("0");
if (time < 100)
builder.append("0");
if (time < 10)
builder.append("0");
builder.append(time);
builder.append('-');
time = instance.get(Calendar.MONTH);
if (time < 10)
builder.append(0);
builder.append(time);
builder.append('-');
time = instance.get(Calendar.DAY_OF_MONTH);
if (time < 10)
builder.append(0);
builder.append(time);
builder.append('T');
time = instance.get(Calendar.HOUR_OF_DAY);
if (time < 10)
builder.append(0);
builder.append(time);
builder.append(':');
time = instance.get(Calendar.MINUTE);
if (time < 10)
builder.append(0);
builder.append(time);
builder.append(':');
time = instance.get(Calendar.SECOND);
if (time < 10)
builder.append(0);
builder.append(time);
builder.append('.');
builder.append(instance.get(Calendar.MILLISECOND));
// this is always GMT offset -> 0
builder.append('Z');
return builder.toString();
}
/**
* @param aMillisecondLong
* @return
*/
public static String buildRfc822Date(long aMillisecondLong) {
/*
* Rather implement it for a special case as use SDF. SDF is very
* expensive to create and not thread safe so it should be synchronized
* of pooled
*/
Calendar instance = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
instance.setTimeInMillis(aMillisecondLong);
StringBuilder builder = new StringBuilder();
// Sun, 06 Aug 2006 00:53:49 +0000
// EEE, dd MMM yyyy HH:mm:ss Z
switch (instance.get(Calendar.DAY_OF_WEEK)) {
case Calendar.SUNDAY:
builder.append("Sun");
break;
case Calendar.MONDAY:
builder.append("Mon");
break;
case Calendar.TUESDAY:
builder.append("Tue");
break;
case Calendar.WEDNESDAY:
builder.append("Wed");
break;
case Calendar.THURSDAY:
builder.append("Thu");
break;
case Calendar.FRIDAY:
builder.append("Fri");
break;
case Calendar.SATURDAY:
builder.append("Sat");
break;
default:
break;
}
builder.append(',');
builder.append(' ');
int time = 0;
time = instance.get(Calendar.DAY_OF_MONTH);
if (time < 10)
builder.append(0);
builder.append(time);
builder.append(' ');
switch (instance.get(Calendar.MONTH)) {
case Calendar.JANUARY:
builder.append("Jan");
break;
case Calendar.FEBRUARY:
builder.append("Feb");
break;
case Calendar.MARCH:
builder.append("Mar");
break;
case Calendar.APRIL:
builder.append("Apr");
break;
case Calendar.MAY:
builder.append("May");
break;
case Calendar.JUNE:
builder.append("Jun");
break;
case Calendar.JULY:
builder.append("Jul");
break;
case Calendar.AUGUST:
builder.append("Aug");
break;
case Calendar.SEPTEMBER:
builder.append("Sep");
break;
case Calendar.OCTOBER:
builder.append("Oct");
break;
case Calendar.NOVEMBER:
builder.append("Nov");
break;
case Calendar.DECEMBER:
builder.append("Dec");
break;
default:
break;
}
builder.append(' ');
time = instance.get(Calendar.YEAR);
if (time < 1000)
builder.append("0");
if (time < 100)
builder.append("0");
if (time < 10)
builder.append("0");
builder.append(time);
builder.append(' ');
time = instance.get(Calendar.HOUR_OF_DAY);
if (time < 10)
builder.append(0);
builder.append(time);
builder.append(':');
time = instance.get(Calendar.MINUTE);
if (time < 10)
builder.append(0);
builder.append(time);
builder.append(':');
time = instance.get(Calendar.SECOND);
if (time < 10)
builder.append(0);
builder.append(time);
// this is always GMT offset -> 0
builder.append(" +0000");
return builder.toString();
}
public GOMLink getHtmlLink(List<GOMLink> links) {
for (GOMLink link : links) {
if ((link.getRel() == null || link.getRel().equals("alternate"))
&& (link.getType() == null || link.getType()
.equalsIgnoreCase("html")))
return link;
}
return null;
}
}