Mercurial > hg > release > thermostat-1.6
view storage/core/src/main/java/com/redhat/thermostat/storage/core/experimental/statement/BeanAdapter.java @ 2049:a92d602216ad
Update copyright license headers for 2017
PR3290
Reviewed-by: jerboaa
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2017-January/021974.html
author | Andrew Azores <aazores@redhat.com> |
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date | Tue, 17 Jan 2017 12:19:56 -0500 |
parents | 31f274ab27a5 |
children |
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/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.storage.core.experimental.statement; import com.redhat.thermostat.common.utils.LoggingUtils; import com.redhat.thermostat.storage.core.Category; import com.redhat.thermostat.storage.core.Cursor; import com.redhat.thermostat.storage.core.DescriptorParsingException; import com.redhat.thermostat.storage.core.PreparedStatement; import com.redhat.thermostat.storage.core.StatementDescriptor; import com.redhat.thermostat.storage.core.StatementExecutionException; import com.redhat.thermostat.storage.core.Storage; import com.redhat.thermostat.storage.model.Pojo; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Objects; import java.util.Set; import java.util.logging.Level; import java.util.logging.Logger; /** * */ public class BeanAdapter<T extends Pojo> { public static final Id INSERT = new Id("BeanAdapter_Insert"); private static final Logger logger = LoggingUtils.getLogger(BeanAdapter.class); protected Category<T> category; private Map<Id, Statement> describedQueries; private Map<Id, Query<T>> queries; private List<FieldDescriptor> fieldDescriptors; public BeanAdapter() { this.queries = new HashMap<>(); this.describedQueries = new HashMap<>(); } protected void setCategory(Category<T> category) { this.category = category; } public Category<T> getCategory() { return category; } public Set<String> describeStatements() { Set<String> descriptions = new HashSet<>(); for (Statement statement : describedQueries.values()) { descriptions.add(statement.get()); } return descriptions; } public void insert(T bean, Storage storage) throws StatementExecutionException { Statement statement = describedQueries.get(INSERT); StatementDescriptor<T> desc = new StatementDescriptor<>(category, statement.get()); try { PreparedStatement<T> prepared = storage.prepareStatement(desc); int i = 0; for (FieldDescriptor descriptor : fieldDescriptors) { Value value = StatementUtils.getValue(bean, descriptor); StatementUtils.setData(prepared, value, i++); } prepared.execute(); } catch (DescriptorParsingException e) { logger.log(Level.SEVERE, "Preparing stmt '" + desc + "' failed!", e); } } public Query<T> getQuery(Id id) { return queries.get(id); } public void query(QueryValues values, ResultHandler<T> handler, Storage storage) throws StatementExecutionException { Objects.requireNonNull(handler, "ResultHandler cannot be null"); Objects.requireNonNull(values, "QueryValues cannot be null"); Objects.requireNonNull(storage, "Storage cannot be null"); Query query = values.getQuery(); if (!queries.containsKey(query.getId())) { throw new IllegalArgumentException("This adapter does not know" + "about the given query: " + query.getId()); } Statement statement = describedQueries.get(query.getId()); List<Criterion> criteria = query.describe(); StatementDescriptor<T> desc = new StatementDescriptor<>(category, statement.get()); PreparedStatement<T> prepared = null; try { prepared = storage.prepareStatement(desc); int i = 0; for (Criterion criterion : criteria) { // sort doesn't take values if (criterion instanceof SortCriterion) { continue; } Value value = values.getValue(criterion); StatementUtils.setData(prepared, value, i++); } } catch (DescriptorParsingException e) { logger.log(Level.SEVERE, "Preparing stmt '" + desc + "' failed!", e); // this can't really happen, but if it does is serious throw new AssertionError("Autogenerated statement failed to parse", e); } Cursor<T> cursor = prepared.executeQuery(); boolean needMoreResults = true; while (cursor.hasNext() && needMoreResults) { T result = cursor.next(); try { needMoreResults = handler.onResult(result); } catch (Throwable t) { logger.log(Level.SEVERE, "Exception executing results", t); } } } protected void addStatement(Id id, Statement statement) { describedQueries.put(id, statement); } protected void addQuery(Id id, Query query) { queries.put(id, query); } protected void setFieldDescriptors(List<FieldDescriptor> fieldDescriptors) { this.fieldDescriptors = fieldDescriptors; } }