| /* |
| * 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.pig.backend.hadoop.accumulo; |
| |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Extracts necessary information from a user provide column "specification": |
| * colf[[*]:[colq[*]]] |
| * |
| * Removes any trailing asterisk on colfam or colqual, and appropriately sets |
| * the {#link Column.Type} |
| */ |
| public class Column { |
| |
| public static enum Type { |
| LITERAL, COLFAM_PREFIX, COLQUAL_PREFIX, |
| } |
| |
| private final Type columnType; |
| private String columnFamily; |
| private String columnQualifier; |
| |
| public Column(String col) { |
| Preconditions.checkNotNull(col); |
| |
| int index = col.indexOf(AbstractAccumuloStorage.COLON); |
| if (-1 == index) { |
| columnFamily = col; |
| columnQualifier = null; |
| |
| if (columnFamily.endsWith(AbstractAccumuloStorage.ASTERISK)) { |
| columnFamily = columnFamily.substring(0, |
| columnFamily.length() - 1); |
| columnType = Type.COLFAM_PREFIX; |
| } else { |
| columnType = Type.LITERAL; |
| } |
| } else { |
| if (1 == col.length()) { |
| throw new IllegalArgumentException("Cannot parse '" + col + "'"); |
| } |
| |
| columnFamily = col.substring(0, index); |
| columnQualifier = col.substring(index + 1); |
| |
| // TODO Handle colf*:colq* ? |
| if (columnFamily.endsWith(AbstractAccumuloStorage.ASTERISK)) { |
| columnType = Type.COLFAM_PREFIX; |
| columnFamily = columnFamily.substring(0, |
| columnFamily.length() - 1); |
| } else if (columnQualifier.isEmpty()) { |
| columnType = Type.COLQUAL_PREFIX; |
| } else if (columnQualifier |
| .endsWith(AbstractAccumuloStorage.ASTERISK)) { |
| columnType = Type.COLQUAL_PREFIX; |
| columnQualifier = columnQualifier.substring(0, |
| columnQualifier.length() - 1); |
| } else { |
| columnType = Type.LITERAL; |
| } |
| } |
| } |
| |
| public Type getType() { |
| return columnType; |
| } |
| |
| public String getColumnFamily() { |
| return columnFamily; |
| } |
| |
| public String getColumnQualifier() { |
| return columnQualifier; |
| } |
| |
| public boolean matchAll() { |
| return Type.COLFAM_PREFIX.equals(columnType) && "".equals(columnFamily); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o instanceof Column) { |
| Column other = (Column) o; |
| |
| if (null != columnFamily) { |
| if (null == other.columnFamily) { |
| return false; |
| } else if (!columnFamily.equals(other.columnFamily)) { |
| return false; |
| } |
| } |
| |
| if (null != columnQualifier) { |
| if (null == other.columnQualifier) { |
| return false; |
| } else if (!columnQualifier.equals(other.columnQualifier)) { |
| return false; |
| } |
| } |
| |
| return columnType == other.columnType; |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return columnType + " " + columnFamily + ":" + columnQualifier; |
| } |
| } |