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From lewismc <...@git.apache.org>
Subject [GitHub] gora pull request #134: GORA-535 Add a data store for Apache Ignite
Date Sat, 14 Jul 2018 22:31:11 GMT
Github user lewismc commented on a diff in the pull request:

    https://github.com/apache/gora/pull/134#discussion_r202526771
  
    --- Diff: gora-ignite/src/main/java/org/apache/gora/ignite/store/IgniteMappingBuilder.java
---
    @@ -0,0 +1,109 @@
    +/**
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You 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.apache.gora.ignite.store;
    +
    +import com.google.inject.ConfigurationException;
    +import java.io.IOException;
    +import java.io.InputStream;
    +import java.util.ArrayList;
    +import java.util.HashMap;
    +import java.util.List;
    +import java.util.Map;
    +import org.apache.gora.persistency.impl.PersistentBase;
    +import org.jdom.Document;
    +import org.jdom.Element;
    +import org.jdom.JDOMException;
    +import org.jdom.input.SAXBuilder;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +/**
    + * Builder for Mapping definitions of Ignite.
    + */
    +public class IgniteMappingBuilder<K, T extends PersistentBase> {
    +
    +  private static final Logger LOG = LoggerFactory.getLogger(IgniteMappingBuilder.class);
    +  /**
    +   * Mapping instance being built
    +   */
    +  private IgniteMapping igniteMapping;
    +
    +  private final IgniteStore<K, T> dataStore;
    +
    +  public IgniteMappingBuilder(final IgniteStore<K, T> store) {
    +    this.igniteMapping = new IgniteMapping();
    +    this.dataStore = store;
    +  }
    +
    +  public IgniteMapping getIgniteMapping() {
    +    return igniteMapping;
    +  }
    +
    +  public void setIgniteMapping(IgniteMapping igniteMapping) {
    +    this.igniteMapping = igniteMapping;
    +  }
    +
    +  public void readMappingFile(String mappingFile) {
    +    try {
    +      SAXBuilder saxBuilder = new SAXBuilder();
    +      InputStream inputStream = getClass().getClassLoader().getResourceAsStream(mappingFile);
    +      if (inputStream == null) {
    +        LOG.error("Mapping file '{}' could not be found!", mappingFile);
    +        throw new IOException("Mapping file '" + mappingFile + "' could not be found!");
    +      }
    +      Document document = saxBuilder.build(inputStream);
    +      if (document == null) {
    +        LOG.error("Mapping file '{}' could not be found!", mappingFile);
    +        throw new IOException("Mapping file '" + mappingFile + "' could not be found!");
    +      }
    +      List<Element> classes = document.getRootElement().getChildren("class");
    +      for (Element classElement : classes) {
    +        if (classElement.getAttributeValue("keyClass").equals(
    +            dataStore.getKeyClass().getCanonicalName())
    +            && classElement.getAttributeValue("name").equals(
    +                dataStore.getPersistentClass().getCanonicalName())) {
    +          final String tableNameFromMapping = classElement.getAttributeValue("table");
    +          String tableName = dataStore.getSchemaName(tableNameFromMapping, dataStore.getPersistentClass());
    +          igniteMapping.setTableName(tableName);
    +          List<Element> prColumns = classElement.getChildren("primarykey");
    +          List<Column> prFields = new ArrayList<>();
    +          for (Element aPrimaryKey : prColumns) {
    +            String name = aPrimaryKey.getAttributeValue("column");
    +            String type = aPrimaryKey.getAttributeValue("type");
    +            prFields.add(new Column(name, Column.FieldType.valueOf(type)));
    +          }
    +          igniteMapping.setPrimaryKey(prFields);
    +          List<Element> fields = classElement.getChildren("field");
    --- End diff --
    
    Type safety: The expression of type List needs unchecked conversion to conform to List
< Element >


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