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com.phloc.commons.changelog.ChangeLogSerializer Maven / Gradle / Ivy
/**
* Copyright (C) 2006-2015 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* Licensed 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 com.phloc.commons.changelog;
import java.io.IOException;
import java.net.URI;
import java.net.URL;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.phloc.commons.ValueEnforcer;
import com.phloc.commons.annotations.PresentForCodeCoverage;
import com.phloc.commons.annotations.ReturnsMutableCopy;
import com.phloc.commons.callback.INonThrowingRunnableWithParameter;
import com.phloc.commons.collections.ContainerHelper;
import com.phloc.commons.io.IInputStreamProvider;
import com.phloc.commons.io.resource.URLResource;
import com.phloc.commons.lang.ClassHelper;
import com.phloc.commons.microdom.IMicroDocument;
import com.phloc.commons.microdom.IMicroElement;
import com.phloc.commons.microdom.convert.MicroTypeConverter;
import com.phloc.commons.microdom.impl.MicroDocument;
import com.phloc.commons.microdom.serialize.MicroReader;
import com.phloc.commons.string.StringHelper;
import com.phloc.commons.string.StringParser;
import com.phloc.commons.text.impl.MultiLingualText;
import com.phloc.commons.version.Version;
import com.phloc.commons.xml.CXML;
import com.phloc.commons.xml.XMLHelper;
/**
* This class handles the reading and writing of changelog objects.
*
* @author Philip Helger
*/
@Immutable
public final class ChangeLogSerializer
{
private static final Logger s_aLogger = LoggerFactory.getLogger (ChangeLogSerializer.class);
private static final String DATE_FORMAT = "yyyy-MM-dd";
private static final String ELEMENT_CHANGELOG = "changelog";
private static final String ATTR_VERSION = "version";
private static final String ATTR_COMPONENT = "component";
private static final String ELEMENT_ENTRY = "entry";
private static final String ATTR_DATE = "date";
private static final String ATTR_ACTION = "action";
private static final String ATTR_CATEGORY = "category";
private static final String ATTR_INCOMPATIBLE = "incompatible";
private static final String ELEMENT_CHANGE = "change";
private static final String ELEMENT_ISSUE = "issue";
private static final String ELEMENT_RELEASE = "release";
@PresentForCodeCoverage
@SuppressWarnings ("unused")
private static final ChangeLogSerializer s_aInstance = new ChangeLogSerializer ();
private static final INonThrowingRunnableWithParameter s_aLoggingCallback = new INonThrowingRunnableWithParameter ()
{
public void run (final String sError)
{
s_aLogger.error (sError);
}
};
private ChangeLogSerializer ()
{}
/**
* Read the change log resource specified by the input stream provider using
* the default logging callback.
*
* @param aISP
* The ISP to read from. Maybe null resulting in a
* null return.
* @return null if the passed ISP was null.
*/
@Nullable
public static ChangeLog readChangeLog (@Nullable final IInputStreamProvider aISP)
{
return readChangeLog (aISP, s_aLoggingCallback);
}
/**
* Read the change log resource specified by the input stream provider.
*
* @param aISP
* The ISP to read from. Maybe null resulting in a
* null return.
* @param aErrorCallback
* The callback that handles potential errors.
* @return null if the passed ISP was null.
*/
@Nullable
public static ChangeLog readChangeLog (@Nullable final IInputStreamProvider aISP,
@Nonnull final INonThrowingRunnableWithParameter aErrorCallback)
{
ValueEnforcer.notNull (aErrorCallback, "ErrorCallback");
final IMicroDocument aDoc = MicroReader.readMicroXML (aISP);
if (aDoc == null)
return null;
final IMicroElement eRoot = aDoc.getDocumentElement ();
if (eRoot == null)
return null;
final ChangeLog ret = new ChangeLog (eRoot.getAttribute (ATTR_VERSION), eRoot.getAttribute (ATTR_COMPONENT));
final DateFormat aDF = new SimpleDateFormat (DATE_FORMAT);
// Add all entries
for (final IMicroElement eElement : eRoot.getAllChildElements ())
{
if (!CChangeLog.CHANGELOG_NAMESPACE_10.equals (eElement.getNamespaceURI ()))
{
aErrorCallback.run ("Element '" +
eElement.getTagName () +
"' has the wrong namespace URI '" +
eElement.getNamespaceURI () +
"'");
continue;
}
final String sTagName = eElement.getTagName ();
if (ELEMENT_ENTRY.equals (sTagName))
{
final String sDate = eElement.getAttribute (ATTR_DATE);
final String sAction = eElement.getAttribute (ATTR_ACTION);
final String sCategory = eElement.getAttribute (ATTR_CATEGORY);
final String sIncompatible = eElement.getAttribute (ATTR_INCOMPATIBLE);
Date aDate;
try
{
aDate = aDF.parse (sDate);
}
catch (final ParseException ex)
{
aErrorCallback.run ("Failed to parse entry date '" + sDate + "'");
continue;
}
final EChangeLogAction eAction = EChangeLogAction.getFromIDOrNull (sAction);
if (eAction == null)
{
aErrorCallback.run ("Failed to parse change log action '" + sAction + "'");
continue;
}
final EChangeLogCategory eCategory = EChangeLogCategory.getFromIDOrNull (sCategory);
if (eCategory == null)
{
aErrorCallback.run ("Failed to parse change log category '" + sCategory + "'");
continue;
}
final boolean bIsIncompatible = StringHelper.hasText (sIncompatible) && StringParser.parseBool (sIncompatible);
final ChangeLogEntry aEntry = new ChangeLogEntry (ret, aDate, eAction, eCategory, bIsIncompatible);
ret.addEntry (aEntry);
final IMicroElement eChange = eElement.getFirstChildElement (CChangeLog.CHANGELOG_NAMESPACE_10, ELEMENT_CHANGE);
if (eChange == null)
{
aErrorCallback.run ("No change element present!");
continue;
}
final MultiLingualText aMLT = MicroTypeConverter.convertToNative (eChange, MultiLingualText.class);
if (aMLT == null)
{
aErrorCallback.run ("Failed to read multi lingual text in change element!");
continue;
}
aEntry.setText (aMLT);
for (final IMicroElement eIssue : eElement.getAllChildElements (CChangeLog.CHANGELOG_NAMESPACE_10,
ELEMENT_ISSUE))
aEntry.addIssue (eIssue.getTextContent ());
}
else
if (ELEMENT_RELEASE.equals (sTagName))
{
final String sDate = eElement.getAttribute (ATTR_DATE);
final String sVersion = eElement.getAttribute (ATTR_VERSION);
Date aDate;
try
{
aDate = aDF.parse (sDate);
}
catch (final ParseException ex)
{
s_aLogger.warn ("Failed to parse release date '" + sDate + "'");
continue;
}
ret.addRelease (new ChangeLogRelease (aDate, new Version (sVersion, false)));
}
else
aErrorCallback.run ("Changelog contains unsupported element '" + sTagName + "!");
}
return ret;
}
@Nonnull
@ReturnsMutableCopy
public static Map readAllChangeLogs ()
{
return readAllChangeLogs (s_aLoggingCallback);
}
@Nonnull
@ReturnsMutableCopy
public static Map readAllChangeLogs (@Nonnull final ClassLoader aClassLoader)
{
return readAllChangeLogs (s_aLoggingCallback, aClassLoader);
}
@Nonnull
@ReturnsMutableCopy
public static Map readAllChangeLogs (@Nonnull final INonThrowingRunnableWithParameter aErrorCallback)
{
return readAllChangeLogs (aErrorCallback, ClassHelper.getDefaultClassLoader ());
}
@Nonnull
@ReturnsMutableCopy
public static Map readAllChangeLogs (@Nonnull final INonThrowingRunnableWithParameter aErrorCallback,
@Nonnull final ClassLoader aClassLoader)
{
ValueEnforcer.notNull (aErrorCallback, "ErrorCallback");
ValueEnforcer.notNull (aClassLoader, "ClassLoader");
try
{
final Map ret = new HashMap ();
// Find all change log XML files in the classpath
for (final URL aURL : ContainerHelper.newList (aClassLoader.getResources (CChangeLog.CHANGELOG_XML_FILENAME)))
{
final URLResource aRes = new URLResource (aURL);
final ChangeLog aChangeLog = readChangeLog (aRes, aErrorCallback);
if (aChangeLog != null)
ret.put (aRes.getAsURI (), aChangeLog);
else
s_aLogger.warn ("Failed to read changelog from URL " + aURL.toExternalForm ());
}
return ret;
}
catch (final IOException ex)
{
// Can be thrown by getResources
throw new IllegalStateException ("Failed to resolved changelogs", ex);
}
}
@Nonnull
public static IMicroDocument writeChangeLog (@Nonnull final ChangeLog aChangeLog)
{
ValueEnforcer.notNull (aChangeLog, "ChangeLog");
final DateFormat aDF = new SimpleDateFormat (DATE_FORMAT);
final IMicroDocument ret = new MicroDocument ();
final IMicroElement eRoot = ret.appendElement (CChangeLog.CHANGELOG_NAMESPACE_10, ELEMENT_CHANGELOG);
eRoot.setAttribute (XMLHelper.getXMLNSAttrName (CXML.XML_NS_PREFIX_XSI), CXML.XML_NS_XSI);
eRoot.setAttribute (CXML.XML_NS_PREFIX_XSI + ":schemaLocation", CChangeLog.CHANGELOG_SCHEMALOCATION_10);
eRoot.setAttribute (ATTR_VERSION, aChangeLog.getOriginalVersion ());
if (StringHelper.hasText (aChangeLog.getComponent ()))
eRoot.setAttribute (ATTR_COMPONENT, aChangeLog.getComponent ());
for (final AbstractChangeLogEntry aBaseEntry : aChangeLog.getAllBaseEntries ())
{
if (aBaseEntry instanceof ChangeLogEntry)
{
final ChangeLogEntry aEntry = (ChangeLogEntry) aBaseEntry;
final IMicroElement eEntry = eRoot.appendElement (CChangeLog.CHANGELOG_NAMESPACE_10, ELEMENT_ENTRY);
eEntry.setAttribute (ATTR_DATE, aDF.format (aEntry.getDate ()));
eEntry.setAttribute (ATTR_ACTION, aEntry.getAction ().getID ());
eEntry.setAttribute (ATTR_CATEGORY, aEntry.getCategory ().getID ());
if (aEntry.isIncompatible ())
eEntry.setAttribute (ATTR_INCOMPATIBLE, Boolean.TRUE.toString ());
eEntry.appendChild (MicroTypeConverter.convertToMicroElement (aEntry.getAllTexts (),
CChangeLog.CHANGELOG_NAMESPACE_10,
ELEMENT_CHANGE));
for (final String sIssue : aEntry.getAllIssues ())
eEntry.appendElement (CChangeLog.CHANGELOG_NAMESPACE_10, ELEMENT_ISSUE).appendText (sIssue);
}
else
{
// Must be a release
final ChangeLogRelease aRelease = (ChangeLogRelease) aBaseEntry;
final IMicroElement eRelease = eRoot.appendElement (CChangeLog.CHANGELOG_NAMESPACE_10, ELEMENT_RELEASE);
eRelease.setAttribute (ATTR_DATE, aDF.format (aRelease.getDate ()));
eRelease.setAttribute (ATTR_VERSION, aRelease.getVersion ().getAsString ());
}
}
return ret;
}
}
