gerrit-server/src/main/java/com/google/gerrit/server/change/GetRelated.java - gerrit - Git at Google

 // Copyright (C) 2013 The Android Open Source Project
 //
 // 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.google.gerrit.server.change;

 import com.google.common.base.MoreObjects;
 import com.google.common.collect.Lists;
 import com.google.gerrit.common.Nullable;
 import com.google.gerrit.extensions.common.CommitInfo;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.CommonConverters;
 import com.google.gerrit.server.change.WalkSorter.PatchSetData;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.git.GroupCollector;
 import com.google.gerrit.server.index.ChangeField;
 import com.google.gerrit.server.index.IndexCollection;
 import com.google.gerrit.server.query.change.ChangeData;
 import com.google.gerrit.server.query.change.InternalChangeQuery;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
 import com.google.inject.Singleton;

 import org.eclipse.jgit.errors.RepositoryNotFoundException;
 import org.eclipse.jgit.lib.Config;
 import org.eclipse.jgit.revwalk.RevCommit;

 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;

 @Singleton
 public class GetRelated implements RestReadView<RevisionResource> {
   private final Provider<ReviewDb> db;
   private final GetRelatedByAncestors byAncestors;
   private final Provider<InternalChangeQuery> queryProvider;
   private final Provider<WalkSorter> sorter;
   private final IndexCollection indexes;
   private final boolean byAncestorsOnly;

   @Inject
   GetRelated(Provider<ReviewDb> db,
       @GerritServerConfig Config cfg,
       GetRelatedByAncestors byAncestors,
       Provider<InternalChangeQuery> queryProvider,
       Provider<WalkSorter> sorter,
       IndexCollection indexes) {
     this.db = db;
     this.byAncestors = byAncestors;
     this.queryProvider = queryProvider;
     this.sorter = sorter;
     this.indexes = indexes;
     byAncestorsOnly =
         cfg.getBoolean("change", null, "getRelatedByAncestors", false);
   }

   @Override
   public RelatedInfo apply(RevisionResource rsrc)
       throws RepositoryNotFoundException, IOException, OrmException {
     List<String> thisPatchSetGroups = GroupCollector.getGroups(rsrc);
     if (byAncestorsOnly
         || thisPatchSetGroups == null
         || !indexes.getSearchIndex().getSchema().hasField(ChangeField.GROUP)) {
       return byAncestors.getRelated(rsrc);
     }
     RelatedInfo relatedInfo = new RelatedInfo();
     relatedInfo.changes = getRelated(rsrc, thisPatchSetGroups);
     return relatedInfo;
   }

   private List<ChangeAndCommit> getRelated(RevisionResource rsrc,
       List<String> thisPatchSetGroups) throws OrmException, IOException {
     if (thisPatchSetGroups.isEmpty()) {
       return Collections.emptyList();
     }

     List<ChangeData> cds = queryProvider.get()
         .enforceVisibility(true)
         .byProjectGroups(
             rsrc.getChange().getProject(),
             getAllGroups(rsrc.getChange().getId()));
     List<ChangeAndCommit> result = new ArrayList<>(cds.size());

     PatchSet.Id editBaseId = rsrc.getEdit().isPresent()
         ? rsrc.getEdit().get().getBasePatchSet().getId()
         : null;
     for (PatchSetData d : sorter.get()
         .includePatchSets(choosePatchSets(thisPatchSetGroups, cds))
         .setRetainBody(true)
         .sort(cds)) {
       PatchSet ps = d.patchSet();
       RevCommit commit;
       if (ps.getId().equals(editBaseId)) {
         // Replace base of an edit with the edit itself.
         ps = rsrc.getPatchSet();
         commit = rsrc.getEdit().get().getEditCommit();
       } else {
         commit = d.commit();
       }
       result.add(new ChangeAndCommit(d.data().change(), ps, commit));
     }

     if (result.size() == 1) {
       ChangeAndCommit r = result.get(0);
       if (r.commit != null
           && r.commit.commit.equals(rsrc.getPatchSet().getRevision().get())) {
         return Collections.emptyList();
       }
     }
     return result;
   }

   private Set<String> getAllGroups(Change.Id changeId) throws OrmException {
     Set<String> result = new HashSet<>();
     for (PatchSet ps : db.get().patchSets().byChange(changeId)) {
       List<String> groups = ps.getGroups();
       if (groups != null) {
         result.addAll(groups);
       }
     }
     return result;
   }

   private static Set<PatchSet.Id> choosePatchSets(List<String> groups,
       List<ChangeData> cds) throws OrmException {
     // Prefer the latest patch set matching at least one group from this
     // revision; otherwise, just use the latest patch set overall.
     Set<PatchSet.Id> result = new HashSet<>();
     for (ChangeData cd : cds) {
       Collection<PatchSet> patchSets = cd.patchSets();
       List<PatchSet> sameGroup = new ArrayList<>(patchSets.size());
       for (PatchSet ps : patchSets) {
         if (hasAnyGroup(ps, groups)) {
           sameGroup.add(ps);
         }
       }
       result.add(ChangeUtil.PS_ID_ORDER.max(
           !sameGroup.isEmpty() ? sameGroup : patchSets).getId());
     }
     return result;
   }

   private static boolean hasAnyGroup(PatchSet ps, List<String> groups) {
     if (ps.getGroups() == null) {
       return false;
     }
     // Expected size of each list is 1, so nested linear search is fine.
     for (String g1 : ps.getGroups()) {
       for (String g2 : groups) {
         if (g1.equals(g2)) {
           return true;
         }
       }
     }
     return false;
   }

   public static class RelatedInfo {
     public List<ChangeAndCommit> changes;
   }

   public static class ChangeAndCommit {
     public String changeId;
     public CommitInfo commit;
     public Integer _changeNumber;
     public Integer _revisionNumber;
     public Integer _currentRevisionNumber;

     public ChangeAndCommit() {
     }

     ChangeAndCommit(@Nullable Change change, @Nullable PatchSet ps, RevCommit c) {
       if (change != null) {
         changeId = change.getKey().get();
         _changeNumber = change.getChangeId();
         _revisionNumber = ps != null ? ps.getPatchSetId() : null;
         PatchSet.Id curr = change.currentPatchSetId();
         _currentRevisionNumber = curr != null ? curr.get() : null;
       }

       commit = new CommitInfo();
       commit.commit = c.name();
       commit.parents = Lists.newArrayListWithCapacity(c.getParentCount());
       for (int i = 0; i < c.getParentCount(); i++) {
         CommitInfo p = new CommitInfo();
         p.commit = c.getParent(i).name();
         commit.parents.add(p);
       }
       commit.author = CommonConverters.toGitPerson(c.getAuthorIdent());
       commit.subject = c.getShortMessage();
     }

     @Override
     public String toString() {
       return MoreObjects.toStringHelper(this)
           .add("changeId", changeId)
           .add("commit", toString(commit))
           .add("_changeNumber", _changeNumber)
           .add("_revisionNumber", _revisionNumber)
           .add("_currentRevisionNumber", _currentRevisionNumber)
           .toString();
     }

     private static String toString(CommitInfo commit) {
       return MoreObjects.toStringHelper(commit)
         .add("commit", commit.commit)
         .add("parent", commit.parents)
         .add("author", commit.author)
         .add("committer", commit.committer)
         .add("subject", commit.subject)
         .add("message", commit.message)
         .add("webLinks", commit.webLinks)
         .toString();
     }
   }
 }
	// Copyright (C) 2013 The Android Open Source Project
	//
	// 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.google.gerrit.server.change;

	import com.google.common.base.MoreObjects;
	import com.google.common.collect.Lists;
	import com.google.gerrit.common.Nullable;
	import com.google.gerrit.extensions.common.CommitInfo;
	import com.google.gerrit.extensions.restapi.RestReadView;
	import com.google.gerrit.reviewdb.client.Change;
	import com.google.gerrit.reviewdb.client.PatchSet;
	import com.google.gerrit.reviewdb.server.ReviewDb;
	import com.google.gerrit.server.ChangeUtil;
	import com.google.gerrit.server.CommonConverters;
	import com.google.gerrit.server.change.WalkSorter.PatchSetData;
	import com.google.gerrit.server.config.GerritServerConfig;
	import com.google.gerrit.server.git.GroupCollector;
	import com.google.gerrit.server.index.ChangeField;
	import com.google.gerrit.server.index.IndexCollection;
	import com.google.gerrit.server.query.change.ChangeData;
	import com.google.gerrit.server.query.change.InternalChangeQuery;
	import com.google.gwtorm.server.OrmException;
	import com.google.inject.Inject;
	import com.google.inject.Provider;
	import com.google.inject.Singleton;

	import org.eclipse.jgit.errors.RepositoryNotFoundException;
	import org.eclipse.jgit.lib.Config;
	import org.eclipse.jgit.revwalk.RevCommit;

	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.HashSet;
	import java.util.List;
	import java.util.Set;

	@Singleton
	public class GetRelated implements RestReadView<RevisionResource> {
	private final Provider<ReviewDb> db;
	private final GetRelatedByAncestors byAncestors;
	private final Provider<InternalChangeQuery> queryProvider;
	private final Provider<WalkSorter> sorter;
	private final IndexCollection indexes;
	private final boolean byAncestorsOnly;

	@Inject
	GetRelated(Provider<ReviewDb> db,
	@GerritServerConfig Config cfg,
	GetRelatedByAncestors byAncestors,
	Provider<InternalChangeQuery> queryProvider,
	Provider<WalkSorter> sorter,
	IndexCollection indexes) {
	this.db = db;
	this.byAncestors = byAncestors;
	this.queryProvider = queryProvider;
	this.sorter = sorter;
	this.indexes = indexes;
	byAncestorsOnly =
	cfg.getBoolean("change", null, "getRelatedByAncestors", false);
	}

	@Override
	public RelatedInfo apply(RevisionResource rsrc)
	throws RepositoryNotFoundException, IOException, OrmException {
	List<String> thisPatchSetGroups = GroupCollector.getGroups(rsrc);
	if (byAncestorsOnly
	\|\| thisPatchSetGroups == null
	\|\| !indexes.getSearchIndex().getSchema().hasField(ChangeField.GROUP)) {
	return byAncestors.getRelated(rsrc);
	}
	RelatedInfo relatedInfo = new RelatedInfo();
	relatedInfo.changes = getRelated(rsrc, thisPatchSetGroups);
	return relatedInfo;
	}

	private List<ChangeAndCommit> getRelated(RevisionResource rsrc,
	List<String> thisPatchSetGroups) throws OrmException, IOException {
	if (thisPatchSetGroups.isEmpty()) {
	return Collections.emptyList();
	}

	List<ChangeData> cds = queryProvider.get()
	.enforceVisibility(true)
	.byProjectGroups(
	rsrc.getChange().getProject(),
	getAllGroups(rsrc.getChange().getId()));
	List<ChangeAndCommit> result = new ArrayList<>(cds.size());

	PatchSet.Id editBaseId = rsrc.getEdit().isPresent()
	? rsrc.getEdit().get().getBasePatchSet().getId()
	: null;
	for (PatchSetData d : sorter.get()
	.includePatchSets(choosePatchSets(thisPatchSetGroups, cds))
	.setRetainBody(true)
	.sort(cds)) {
	PatchSet ps = d.patchSet();
	RevCommit commit;
	if (ps.getId().equals(editBaseId)) {
	// Replace base of an edit with the edit itself.
	ps = rsrc.getPatchSet();
	commit = rsrc.getEdit().get().getEditCommit();
	} else {
	commit = d.commit();
	}
	result.add(new ChangeAndCommit(d.data().change(), ps, commit));
	}

	if (result.size() == 1) {
	ChangeAndCommit r = result.get(0);
	if (r.commit != null
	&& r.commit.commit.equals(rsrc.getPatchSet().getRevision().get())) {
	return Collections.emptyList();
	}
	}
	return result;
	}

	private Set<String> getAllGroups(Change.Id changeId) throws OrmException {
	Set<String> result = new HashSet<>();
	for (PatchSet ps : db.get().patchSets().byChange(changeId)) {
	List<String> groups = ps.getGroups();
	if (groups != null) {
	result.addAll(groups);
	}
	}
	return result;
	}

	private static Set<PatchSet.Id> choosePatchSets(List<String> groups,
	List<ChangeData> cds) throws OrmException {
	// Prefer the latest patch set matching at least one group from this
	// revision; otherwise, just use the latest patch set overall.
	Set<PatchSet.Id> result = new HashSet<>();
	for (ChangeData cd : cds) {
	Collection<PatchSet> patchSets = cd.patchSets();
	List<PatchSet> sameGroup = new ArrayList<>(patchSets.size());
	for (PatchSet ps : patchSets) {
	if (hasAnyGroup(ps, groups)) {
	sameGroup.add(ps);
	}
	}
	result.add(ChangeUtil.PS_ID_ORDER.max(
	!sameGroup.isEmpty() ? sameGroup : patchSets).getId());
	}
	return result;
	}

	private static boolean hasAnyGroup(PatchSet ps, List<String> groups) {
	if (ps.getGroups() == null) {
	return false;
	}
	// Expected size of each list is 1, so nested linear search is fine.
	for (String g1 : ps.getGroups()) {
	for (String g2 : groups) {
	if (g1.equals(g2)) {
	return true;
	}
	}
	}
	return false;
	}

	public static class RelatedInfo {
	public List<ChangeAndCommit> changes;
	}

	public static class ChangeAndCommit {
	public String changeId;
	public CommitInfo commit;
	public Integer _changeNumber;
	public Integer _revisionNumber;
	public Integer _currentRevisionNumber;

	public ChangeAndCommit() {
	}

	ChangeAndCommit(@Nullable Change change, @Nullable PatchSet ps, RevCommit c) {
	if (change != null) {
	changeId = change.getKey().get();
	_changeNumber = change.getChangeId();
	_revisionNumber = ps != null ? ps.getPatchSetId() : null;
	PatchSet.Id curr = change.currentPatchSetId();
	_currentRevisionNumber = curr != null ? curr.get() : null;
	}

	commit = new CommitInfo();
	commit.commit = c.name();
	commit.parents = Lists.newArrayListWithCapacity(c.getParentCount());
	for (int i = 0; i < c.getParentCount(); i++) {
	CommitInfo p = new CommitInfo();
	p.commit = c.getParent(i).name();
	commit.parents.add(p);
	}
	commit.author = CommonConverters.toGitPerson(c.getAuthorIdent());
	commit.subject = c.getShortMessage();
	}

	@Override
	public String toString() {
	return MoreObjects.toStringHelper(this)
	.add("changeId", changeId)
	.add("commit", toString(commit))
	.add("_changeNumber", _changeNumber)
	.add("_revisionNumber", _revisionNumber)
	.add("_currentRevisionNumber", _currentRevisionNumber)
	.toString();
	}

	private static String toString(CommitInfo commit) {
	return MoreObjects.toStringHelper(commit)
	.add("commit", commit.commit)
	.add("parent", commit.parents)
	.add("author", commit.author)
	.add("committer", commit.committer)
	.add("subject", commit.subject)
	.add("message", commit.message)
	.add("webLinks", commit.webLinks)
	.toString();
	}
	}
	}