content: /*
   * 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 com.aliyun.odps.data;
  
  import java.util.Arrays;
  import java.util.LinkedHashMap;
  import java.util.Map.Entry;
  
  import com.aliyun.odps.utils.StringUtils;
  
  import com.aliyun.odps.PartitionSpec;
  
  /**
   * 表信息，用于定义作业的输入和输出以及表类型的资源.
   */
  public class TableInfo {
  
    public static final String DEFAULT_LABEL = "__default__";
    public static final String INNER_OUTPUT_LABEL = "INNER_OUTPUT";
  
    private String projectName;
    private String tblName;
    private LinkedHashMap<String, String> partSpec = new LinkedHashMap<String, String>();
    private String[] cols;
    private String label = DEFAULT_LABEL;
    private String mapperClassName;
  
    public static class TableInfoBuilder {
  
      private TableInfo table = new TableInfo();
  
      public TableInfoBuilder projectName(String projectName) {
        table.setProjectName(projectName);
        return this;
      }
  
      public TableInfoBuilder mapperClass(@SuppressWarnings("rawtypes") Class mapperClass) {
        table.setMapperClass(mapperClass);
        return this;
      }
  
      public TableInfoBuilder tableName(String tblName) {
        table.setTableName(tblName);
        return this;
      }
  
      public TableInfoBuilder partSpec(LinkedHashMap<String, String> partSpec) {
        table.setPartSpec(partSpec);
        return this;
      }
  
      public TableInfoBuilder partSpec(PartitionSpec partSpec) {
        if (partSpec != null && !partSpec.isEmpty()) {
          LinkedHashMap<String, String> map = new LinkedHashMap<String, String>();
          for (String key : partSpec.keys()) {
            map.put(key, partSpec.get(key));
          }
          table.setPartSpec(map);
        }
        return this;
      }
  
      public TableInfoBuilder partSpec(String partPath) {
        table.setPartSpec(partPath);
        return this;
      }
  
      public TableInfoBuilder cols(String[] cols) {
        table.setCols(cols);
        return this;
      }
  
      public TableInfoBuilder label(String label) {
        table.setLable(label);
        return this;
      }
  
      public TableInfo build() {
        return new TableInfo(table);
      }
  
    }
  
    /**
     * 给定表名和分区构造一个表信息对象
     *
     * @param projectName
     * @param tblName
     * @param partSpec
     * @param cols
     * @param lable
     */
    public TableInfo(String projectName, String tblName, LinkedHashMap<String, String> partSpec,
                     String[] cols, String lable) {
      this.projectName = projectName;
      this.tblName = tblName;
      this.partSpec = partSpec;
      this.cols = cols;
      this.label = lable;
      
      validate();
    }
  
    public TableInfo() {
  
    }
  
    public TableInfo(TableInfo table) {
      this(table.projectName, table.tblName, table.partSpec, table.cols, table.label);
      this.mapperClassName = table.mapperClassName;
    }
  
    public static TableInfoBuilder builder() {
      return new TableInfoBuilder();
    }
    
    public void validate() {
      if (tblName == null || tblName.trim().isEmpty()) {
        throw new RuntimeException("ODPS-0730001: table should not be null or empty: " + tblName);
      }
    }
  
    /**
     * 获取表的Project.
     *
     * @return 表的Project
     */
    public String getProjectName() {
      return projectName;
    }
  
    /**
     * 获取分区描述，分区描述是一个PartitionSpec对象.
     *
     * @return 分区
     */
    public PartitionSpec getPartitionSpec() {
      PartitionSpec partitionSpec = new PartitionSpec();
      for (String key : partSpec.keySet()) {
        partitionSpec.set(key, partSpec.get(key));
      }
      return partitionSpec;
    }
  
    /**
     * 获取分区描述，分区描述是一个有序Map, 其中key是分区名，value是对应分区的取值.
     *
     * @return 分区
     */
    public LinkedHashMap<String, String> getPartSpec() {
      return partSpec;
    }
  
    /**
     * 获取分区路径. 分区路径是一个由/分隔,=对应的字符串, 会以／结尾. 例如ds=20131230/hr=10/
     *
     * @return 分区路径
     */
    public String getPartPath() {
      StringBuilder sb = new StringBuilder();
      if (partSpec != null) {
        for (Entry<String, String> e : partSpec.entrySet()) {
          sb.append(e.getKey()).append(DELIMITER).append(e.getValue()).append(SEPERATOR);
        }
      }
      return sb.toString();
    }
  
    /**
     * 设置分区描述
     *
     * @param partSpec
     */
    public void setPartSpec(LinkedHashMap<String, String> partSpec) {
      this.partSpec = partSpec;
    }
  
    /**
     * 设置分区描述
     *
     * @param partSpec
     */
    public void setPartSpec(String partPath) {
      this.partSpec = getPartSpecFromPath(partPath);
    }
  
    /**
     * 获取查询列
     *
     * @return
     */
    public String[] getCols() {
      return cols;
    }
  
    /**
     * 设置查询列
     *
     * @param cols
     */
    public void setCols(String[] cols) {
      this.cols = cols;
    }
  
    /**
     * 获取表名
     *
     * @return
     */
    public String getTableName() {
      return tblName;
    }
  
    /**
     * 设置表名
     *
     * @param name
     */
    public void setTableName(String name) {
      if (name == null || name.trim().isEmpty()) {
        throw new RuntimeException(
            "ODPS-0730001: table should not be null or empty: " + name);
      }
      String[] ss = StringUtils.splitPreserveAllTokens(name.trim(), '.');
      if (ss.length == 2) {
        if (ss[0].trim().isEmpty() || ss[1].trim().isEmpty()) {
          throw new RuntimeException("ODPS-0730001: error table format: " + name);
        }
        this.projectName = ss[0];
        this.tblName = ss[1];
      } else if (ss.length == 1) {
        if (ss[0].trim().isEmpty()) {
          throw new RuntimeException("ODPS-0730001: error table format: " + name);
        }
        this.tblName = ss[0];
      } else {
        throw new RuntimeException("ODPS-0730001: error table format: " + name);
      }
    }
  
    /**
     * 获取标签
     *
     * @return
     */
    public String getLabel() {
      return label;
    }
  
    /**
     * 设置标签
     *
     * @param lable
     */
    public void setLable(String lable) {
      this.label = lable;
    }
  
    /**
     * 获取输入表对应的mapper类
     * 
     * @return mapper类
     */
    public Class<?> getMapperClass() {
      if (StringUtils.isEmpty(mapperClassName)) {
        return null;
      }
      Class<?> mapperClass = null;
      try {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        if (classLoader == null) {
          classLoader = getClass().getClassLoader();
        }
        mapperClass = Class.forName(mapperClassName, false, classLoader);
      } catch (ClassNotFoundException e) {
        throw new RuntimeException("ODPS-0730001: ClassNotFoundException - " + e.getMessage());
      }
      return mapperClass;
    }
  
    /**
     * 设置输入表对应的mapper类
     * 
     * @param mapperClass
     */
    public void setMapperClass(Class<?> mapperClass) {
      mapperClassName = mapperClass.getName();
    }
  
    /**
     * 设置Project名
     *
     * @param projectName
     */
    public void setProjectName(String projectName) {
      this.projectName = projectName;
    }
  
    @Override
    public boolean equals(Object that) {
      if (!(that instanceof TableInfo)) {
        return false;
      }
      TableInfo t = (TableInfo) that;
      if (stringEquals(projectName, t.projectName) && stringEquals(tblName, t.tblName)
          && Arrays.equals(this.cols, t.cols) && stringEquals(label, t.label)
          && this.partSpec.equals(t.partSpec)) {
        return true;
      }
      return false;
    }
  
    @Override
    public int hashCode() {
      int result = projectName != null ? projectName.hashCode() : 0;
      result = 31 * result + (tblName != null ? tblName.hashCode() : 0);
      result = 31 * result + (cols != null ? Arrays.hashCode(cols) : 0);
      result = 31 * result + (label != null ? label.hashCode() : 0);
      result = 31 * result + (partSpec != null ? partSpec.hashCode() : 0);
      return result;
    }
  
    private transient static final String SEPERATOR = "/";
    private transient static final String DELIMITER = "=";
  
    @Override
    public String toString() {
      StringBuilder sb = new StringBuilder();
      if (projectName != null) {
        sb.append(projectName).append('.');
      }
      sb.append(tblName);
      if (partSpec != null && !partSpec.isEmpty()) {
        sb.append(partSpec.toString());
      }
      return sb.toString();
    }
  
    private static boolean stringEquals(final String cs1, final String cs2) {
      if (cs1 == cs2) {
        return true;
      }
      if (cs1 == null || cs2 == null) {
        return false;
      }
      return cs1.equals(cs2);
    }
  
    private LinkedHashMap<String, String> getPartSpecFromPath(String path) {
      LinkedHashMap<String, String> map = new LinkedHashMap<String, String>();
      if (path != null && !path.trim().isEmpty()) {
        String[] parts = path.split(SEPERATOR);
        for (String part : parts) {
          String[] ss = part.split(DELIMITER);
          if (ss.length != 2) {
            throw new RuntimeException("ODPS-0730001: error part spec format: " + path);
          }
          map.put(ss[0], ss[1]);
        }
      }
      return map;
    }
  }
  