Java tutorial
/* * Copyright 2014 JBoss Inc * * 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 org.overlord.sramp.server.mvn.services; import java.text.ParseException; import java.text.SimpleDateFormat; import org.apache.commons.lang.StringUtils; import org.overlord.sramp.repository.QueryManager; import org.overlord.sramp.repository.QueryManagerFactory; import org.overlord.sramp.repository.query.SrampQuery; import org.overlord.sramp.server.i18n.Messages; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Builder class that construct a MavenMetadata object based on an url String * which correct format would be groupId/groupId.../version/file_name In case * that the url can not be converted to a correct maven metadata object, it * would return a MavenMetadata with all its attributes with an empty value. * * @author David Virgil Naranjo */ public class MavenMetaDataBuilder { private static Logger logger = LoggerFactory.getLogger(MavenMetaDataBuilder.class); /** * Builds the Maven Metadata based on a URL, which format is supposed to be /groupId.../artifactId/versionId/filename * * @param url * the url * @return the maven meta data */ public static MavenMetaData build(String url) { String groupId = ""; //$NON-NLS-1$ String artifactId = ""; //$NON-NLS-1$ String version = ""; //$NON-NLS-1$ String type = ""; //$NON-NLS-1$ String classifier = ""; //$NON-NLS-1$ String parentType = ""; //$NON-NLS-1$ String fileName = ""; //$NON-NLS-1$ String snapshotId = ""; //$NON-NLS-1$ if (url.startsWith("/")) { //$NON-NLS-1$ url = url.substring(1); } int lastPathSegmentIdx = url.lastIndexOf('/'); String lastPathSegment = null; if (lastPathSegmentIdx != -1) { lastPathSegment = url.substring(lastPathSegmentIdx + 1); } //This means the last part contains a file with a file extension if (lastPathSegment != null && lastPathSegment.indexOf('.') != -1) { String[] tokens = url.split("/"); //$NON-NLS-1$ if (tokens != null && tokens.length > 0) { //There could be files either in the artifact folder(maven-metadata.xml) or in the version folder. //Then for that it is mandatory to have more than 2 tokens. At least one for groupId, one for artifactId and one for fileName if (tokens.length >= 3) { if (lastPathSegment.contains("maven-metadata.xml")) { //$NON-NLS-1$ String possibleGroupId = ""; //$NON-NLS-1$ boolean isGroup = false; // There are checked the different possibilities about // groupsIds. // It is checked in s-ramp // It is checked from the end to the beginning to avoid // the case that an artifact is contained in a groupId // that contains subgroups // First store the biggest possibility, not until the // last token. The last would be the filename and the // previous could be the artifactId for (int i = 0; i < tokens.length - 2; i++) { possibleGroupId += tokens[i]; if (i < tokens.length - 1) { possibleGroupId += "."; //$NON-NLS-1$ } } // For example for org.overlord.test the number of // checks is going to be 3 int iterations = StringUtils.countMatches(possibleGroupId, ".") + 1; //$NON-NLS-1$ for (int i = 0; i < iterations; i++) { if (isGroupId(possibleGroupId)) { isGroup = true; break; } if (possibleGroupId.lastIndexOf(".") != -1) { //$NON-NLS-1$ possibleGroupId = possibleGroupId.substring(0, possibleGroupId.lastIndexOf(".")); //$NON-NLS-1$ } } // If there is a group in s-ramp that matches the // request if (isGroup) { // This means there is an existing groupId in s-ramp groupId = possibleGroupId; String lastGroupIdToken = ""; //$NON-NLS-1$ if (groupId.contains(".")) { //$NON-NLS-1$ lastGroupIdToken = groupId.substring(groupId.lastIndexOf(".") + 1); //$NON-NLS-1$ } else { lastGroupIdToken = groupId; } int groupIdIndex = 0; for (groupIdIndex = 0; groupIdIndex < tokens.length; groupIdIndex++) { if (tokens[groupIdIndex].equals(lastGroupIdToken)) { break; } } if (tokens.length == (groupIdIndex + 3)) { // This means it comes a file under the artifact // id. // Example: // /org/test/artifact/maven-metadata.xml // where org/test is the groupId artifactId = tokens[groupIdIndex + 1]; if (!existVersion(groupId, tokens[groupIdIndex + 2])) { fileName = tokens[groupIdIndex + 2]; } } else if (tokens.length == (groupIdIndex + 4)) { // This means it comes a file under the version // id. // Example: // /org/test/artifact/0.0.1/maven-metadata.xml // where // org/test is the groupId abd // artifactId=artifact // and version=0.0.1 artifactId = tokens[groupIdIndex + 1]; version = tokens[groupIdIndex + 2]; fileName = tokens[groupIdIndex + 3]; } } else { // If the groupId can not be found in s-ramp then, // it is built a default metadata. // Remember that this method is called, both listing // content and creating new content version = tokens[tokens.length - 2]; for (int i = 0; i < tokens.length - 2; i++) { if (i < tokens.length - 3) { if (i != 0) { groupId += "."; //$NON-NLS-1$ } groupId += tokens[i]; } else { artifactId = tokens[i]; } } fileName = tokens[tokens.length - 1]; } } else { //If the groupId can not be found in s-ramp then, it is built a default metadata. //Remember that this method is called, both listing content and creating new content version = tokens[tokens.length - 2]; for (int i = 0; i < tokens.length - 2; i++) { if (i < tokens.length - 3) { if (i != 0) { groupId += "."; //$NON-NLS-1$ } groupId += tokens[i]; } else { artifactId = tokens[i]; } } fileName = tokens[tokens.length - 1]; } //It is parsed the fileName to get information about the classifier if (StringUtils.isNotBlank(fileName)) { type = fileName.substring(fileName.lastIndexOf(".") + 1); //$NON-NLS-1$ classifier = ""; //$NON-NLS-1$ //We know the information about classifier comes in files that are under the version folder if (StringUtils.isNotBlank(version)) { String versionParsed = ""; //$NON-NLS-1$ //When the version contains a -SNAPSHOT, then the filename is artifactId-versionWithoutSNAPSHOT //The snapshot keyword is substitute by a timestamp-counter if (version.contains("-SNAPSHOT")) { //$NON-NLS-1$ versionParsed = version.substring(0, version.lastIndexOf("-SNAPSHOT")); //$NON-NLS-1$ } else { versionParsed = version; } if (!fileName.contains(version) && fileName.startsWith(artifactId + "-" + versionParsed)) { //$NON-NLS-1$ String without_extension = fileName.substring(0, fileName.lastIndexOf(".")); //$NON-NLS-1$ if (StringUtils.countMatches(without_extension, "-") >= 2) { //$NON-NLS-1$ int versionIdx = without_extension.indexOf(versionParsed); int versionLen = versionParsed.length(); int classifierIdx = versionIdx + versionLen; if (classifierIdx < without_extension.length()) { //If it is an snapshop if (version.contains("SNAPSHOT") && !version.equals(versionParsed)) { //$NON-NLS-1$ String rest = without_extension.substring(classifierIdx + 1); //All the tokens from the clasifierIdx to the end are splitted by '-' String[] tokens_file_name = rest.split("-"); //$NON-NLS-1$ if (tokens_file_name.length > 0) { //It is expected a timestamp if (isMavenTimeStamp(tokens_file_name[0])) { if (tokens_file_name.length > 1) { try { //The it is expected maybe a counter String[] counter = StringUtils .split(tokens_file_name[1], "."); //$NON-NLS-1$ Integer.parseInt(counter[0]); snapshotId = tokens_file_name[0] + "-" + counter[0]; //$NON-NLS-1$ if (tokens_file_name.length > 2) { classifier = tokens_file_name[2]; } else if (counter.length == 2) { parentType = counter[1]; } } catch (NumberFormatException nfe) { //In case the parseInt throw an exception it means there is not any counter, and then the classifier goes to the end of the filename classifier = rest .substring(tokens_file_name[0].length() + 1); } } } else { classifier = rest; } } } else { //This means the version is not snapshot or there is no timestamp in the file classifier = without_extension.substring(classifierIdx); } if (StringUtils.isNotBlank(classifier)) { if (classifier.contains(".")) {//$NON-NLS-1$ if (classifier.startsWith(".")) { //$NON-NLS-1$ parentType = classifier.substring(1); classifier = ""; //$NON-NLS-1$ } else { parentType = classifier .substring(classifier.lastIndexOf(".") + 1); //$NON-NLS-1$ classifier = classifier.substring(0, classifier.lastIndexOf(".")); //$NON-NLS-1$ } } } } } } } } } } } //If the type, belongs to the MavenFileExtensionEnum, it means than it is sha1 or md5. if (MavenFileExtensionEnum.value(type) != null) { //Then the parent type has to be filled. We know that the parent type can be taken from the filename String without_ext = fileName.substring(0, fileName.lastIndexOf("." + type)); //$NON-NLS-1$ if (without_ext.contains(".")) { //$NON-NLS-1$ parentType = without_ext.substring(without_ext.lastIndexOf(".") + 1); //$NON-NLS-1$ } } return new MavenMetaData(groupId, artifactId, version, type, classifier, snapshotId, parentType, fileName); } /** * Checks that there are items in s-ramp with an specific group maven id * * @param groupId * the group id * @return true, if is group id */ private static boolean isGroupId(String groupId) { String query = "/s-ramp[@maven.groupId = ?]"; //$NON-NLS-1$ try { QueryManager queryManager = QueryManagerFactory.newInstance(); SrampQuery srampQuery = queryManager.createQuery(query); srampQuery.setString(groupId); org.overlord.sramp.repository.query.ArtifactSet artifactSet = srampQuery.executeQuery(); if (artifactSet.size() > 0) { return true; } } catch (Throwable e) { logger.error(Messages.i18n.format("maven.resource.query.error", query), e); //$NON-NLS-1$ } return false; } /** * Checks that there are items in s-ramp with an specific group and version * maven id * * @param groupId * the group id * @param version * the version * @return true, if successful */ private static boolean existVersion(String groupId, String version) { String query = "/s-ramp[@maven.groupId = ? and @maven.version = ? ]"; //$NON-NLS-1$ try { QueryManager queryManager = QueryManagerFactory.newInstance(); SrampQuery srampQuery = queryManager.createQuery(query); srampQuery.setString(groupId); srampQuery.setString(version); org.overlord.sramp.repository.query.ArtifactSet artifactSet = srampQuery.executeQuery(); if (artifactSet.size() > 0) { return true; } } catch (Throwable e) { logger.error(Messages.i18n.format("maven.resource.query.error", query), e); //$NON-NLS-1$ } return false; } /** * Checks if the parameter is a maven time stamp. * * @param possibleTimestamp * the possible timestamp * @return true, if is maven time stamp */ private static boolean isMavenTimeStamp(String possibleTimestamp) { // Timestamp included by maven in the snapthots artifacts. SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd.HHmmss"); //$NON-NLS-1$ try { sdf.parse(possibleTimestamp); } catch (ParseException e) { return false; } return true; } }