| // Copyright (C) 2010 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.query.change; |
| |
| import com.google.gerrit.reviewdb.Change; |
| import com.google.gerrit.reviewdb.PatchSet; |
| import com.google.gerrit.reviewdb.ReviewDb; |
| import com.google.gerrit.server.CurrentUser; |
| import com.google.gerrit.server.events.ChangeAttribute; |
| import com.google.gerrit.server.events.EventFactory; |
| import com.google.gerrit.server.events.QueryStats; |
| import com.google.gerrit.server.query.Predicate; |
| import com.google.gerrit.server.query.QueryParseException; |
| import com.google.gson.Gson; |
| import com.google.gwtorm.client.OrmException; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| |
| import org.eclipse.jgit.util.io.DisabledOutputStream; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.BufferedWriter; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.lang.reflect.Field; |
| import java.text.SimpleDateFormat; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.Date; |
| import java.util.HashSet; |
| import java.util.List; |
| |
| public class QueryProcessor { |
| private static final Logger log = |
| LoggerFactory.getLogger(QueryProcessor.class); |
| |
| public static enum OutputFormat { |
| TEXT, JSON; |
| } |
| |
| private final Gson gson = new Gson(); |
| private final SimpleDateFormat sdf = |
| new SimpleDateFormat("yyyy-MM-dd HH:mm:ss zzz"); |
| |
| private final EventFactory eventFactory; |
| private final ChangeQueryBuilder queryBuilder; |
| private final ChangeQueryRewriter queryRewriter; |
| private final Provider<ReviewDb> db; |
| |
| private int defaultLimit = 500; |
| private OutputFormat outputFormat = OutputFormat.TEXT; |
| private boolean includePatchSets; |
| private boolean includeCurrentPatchSet; |
| |
| private OutputStream outputStream = DisabledOutputStream.INSTANCE; |
| private PrintWriter out; |
| |
| @Inject |
| QueryProcessor(EventFactory eventFactory, |
| ChangeQueryBuilder.Factory queryBuilder, CurrentUser currentUser, |
| ChangeQueryRewriter queryRewriter, Provider<ReviewDb> db) { |
| this.eventFactory = eventFactory; |
| this.queryBuilder = queryBuilder.create(currentUser); |
| this.queryRewriter = queryRewriter; |
| this.db = db; |
| } |
| |
| public void setIncludePatchSets(boolean on) { |
| includePatchSets = on; |
| } |
| |
| public void setIncludeCurrentPatchSet(boolean on) { |
| includeCurrentPatchSet = on; |
| } |
| |
| public void setOutput(OutputStream out, OutputFormat fmt) { |
| this.outputStream = out; |
| this.outputFormat = fmt; |
| } |
| |
| public void query(String queryString) throws IOException { |
| out = new PrintWriter( // |
| new BufferedWriter( // |
| new OutputStreamWriter(outputStream, "UTF-8"))); |
| try { |
| try { |
| final QueryStats stats = new QueryStats(); |
| stats.runTimeMilliseconds = System.currentTimeMillis(); |
| |
| final Predicate<ChangeData> visibleToMe = queryBuilder.is_visible(); |
| Predicate<ChangeData> s = compileQuery(queryString, visibleToMe); |
| List<ChangeData> results = new ArrayList<ChangeData>(); |
| HashSet<Change.Id> want = new HashSet<Change.Id>(); |
| for (ChangeData d : ((ChangeDataSource) s).read()) { |
| if (d.hasChange()) { |
| // Checking visibleToMe here should be unnecessary, the |
| // query should have already performed it. But we don't |
| // want to trust the query rewriter that much yet. |
| // |
| if (visibleToMe.match(d)) { |
| results.add(d); |
| } |
| } else { |
| want.add(d.getId()); |
| } |
| } |
| |
| if (!want.isEmpty()) { |
| for (Change c : db.get().changes().get(want)) { |
| ChangeData d = new ChangeData(c); |
| if (visibleToMe.match(d)) { |
| results.add(d); |
| } |
| } |
| } |
| |
| Collections.sort(results, new Comparator<ChangeData>() { |
| @Override |
| public int compare(ChangeData a, ChangeData b) { |
| return b.getChange().getSortKey().compareTo( |
| a.getChange().getSortKey()); |
| } |
| }); |
| |
| int limit = limit(s); |
| if (limit < results.size()) { |
| results = results.subList(0, limit); |
| } |
| |
| for (ChangeData d : results) { |
| ChangeAttribute c = eventFactory.asChangeAttribute(d.getChange()); |
| eventFactory.extend(c, d.getChange()); |
| eventFactory.addTrackingIds(c, d.trackingIds(db)); |
| |
| if (includePatchSets) { |
| eventFactory.addPatchSets(c, d.patches(db)); |
| } |
| |
| if (includeCurrentPatchSet) { |
| PatchSet current = d.currentPatchSet(db); |
| if (current != null) { |
| c.currentPatchSet = eventFactory.asPatchSetAttribute(current); |
| eventFactory.addApprovals(c.currentPatchSet, // |
| d.approvalsFor(db, current.getId())); |
| } |
| } |
| |
| show(c); |
| } |
| |
| stats.rowCount = results.size(); |
| stats.runTimeMilliseconds = |
| System.currentTimeMillis() - stats.runTimeMilliseconds; |
| show(stats); |
| } catch (OrmException err) { |
| log.error("Cannot execute query: " + queryString, err); |
| |
| ErrorMessage m = new ErrorMessage(); |
| m.message = "cannot query database"; |
| show(m); |
| |
| } catch (QueryParseException e) { |
| ErrorMessage m = new ErrorMessage(); |
| m.message = e.getMessage(); |
| show(m); |
| } |
| } finally { |
| try { |
| out.flush(); |
| } finally { |
| out = null; |
| } |
| } |
| } |
| |
| private int limit(Predicate<ChangeData> s) { |
| return queryBuilder.hasLimit(s) ? queryBuilder.getLimit(s) : defaultLimit; |
| } |
| |
| @SuppressWarnings("unchecked") |
| private Predicate<ChangeData> compileQuery(String queryString, |
| final Predicate<ChangeData> visibleToMe) throws QueryParseException { |
| |
| Predicate<ChangeData> q = queryBuilder.parse(queryString); |
| if (!queryBuilder.hasLimit(q)) { |
| q = Predicate.and(q, queryBuilder.limit(defaultLimit)); |
| } |
| if (!queryBuilder.hasSortKey(q)) { |
| q = Predicate.and(q, queryBuilder.sortkey_before("z")); |
| } |
| q = Predicate.and(q, visibleToMe); |
| |
| Predicate<ChangeData> s = queryRewriter.rewrite(q); |
| if (!(s instanceof ChangeDataSource)) { |
| s = queryRewriter.rewrite(Predicate.and(queryBuilder.status_open(), q)); |
| } |
| |
| if (!(s instanceof ChangeDataSource)) { |
| throw new QueryParseException("cannot execute query: " + s); |
| } |
| |
| return s; |
| } |
| |
| private void show(Object data) { |
| switch (outputFormat) { |
| default: |
| case TEXT: |
| if (data instanceof ChangeAttribute) { |
| out.print("change "); |
| out.print(((ChangeAttribute) data).id); |
| out.print("\n"); |
| showText(data, 1); |
| } else { |
| showText(data, 0); |
| } |
| out.print('\n'); |
| break; |
| |
| case JSON: |
| out.print(gson.toJson(data)); |
| out.print('\n'); |
| break; |
| } |
| } |
| |
| private void showText(Object data, int depth) { |
| for (Field f : fieldsOf(data.getClass())) { |
| Object val; |
| try { |
| val = f.get(data); |
| } catch (IllegalArgumentException err) { |
| continue; |
| } catch (IllegalAccessException err) { |
| continue; |
| } |
| if (val == null) { |
| continue; |
| } |
| |
| indent(depth); |
| out.print(f.getName()); |
| out.print(":"); |
| |
| if (val instanceof Long && isDateField(f.getName())) { |
| out.print(' '); |
| out.print(sdf.format(new Date(((Long) val) * 1000L))); |
| out.print('\n'); |
| } else { |
| showTextValue(val, depth); |
| } |
| } |
| } |
| |
| private void indent(int depth) { |
| for (int i = 0; i < depth; i++) { |
| out.print(" "); |
| } |
| } |
| |
| @SuppressWarnings( {"cast", "unchecked"}) |
| private void showTextValue(Object value, int depth) { |
| if (isPrimitive(value)) { |
| out.print(' '); |
| out.print(value); |
| out.print('\n'); |
| |
| } else if (value instanceof Collection) { |
| out.print('\n'); |
| for (Object thing : ((Collection) value)) { |
| if (isPrimitive(thing)) { |
| out.print(' '); |
| out.print(value); |
| out.print('\n'); |
| } else { |
| showText(thing, depth + 1); |
| out.print('\n'); |
| } |
| } |
| } else { |
| out.print('\n'); |
| showText(value, depth + 1); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static boolean isPrimitive(Object value) { |
| return value instanceof String // |
| || value instanceof Number // |
| || value instanceof Boolean // |
| || value instanceof Enum; |
| } |
| |
| private static boolean isDateField(String name) { |
| return "lastUpdated".equals(name) // |
| || "grantedOn".equals(name); |
| } |
| |
| private List<Field> fieldsOf(Class<?> type) { |
| List<Field> r = new ArrayList<Field>(); |
| if (type.getSuperclass() != null) { |
| r.addAll(fieldsOf(type.getSuperclass())); |
| } |
| r.addAll(Arrays.asList(type.getDeclaredFields())); |
| return r; |
| } |
| |
| static class ErrorMessage { |
| public final String type = "error"; |
| public String message; |
| } |
| } |