org.apache.kylin.metadata.tuple.TupleInfo Maven / Gradle / Ivy

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/*
 * 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.kylin.metadata.tuple;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.kylin.metadata.model.TblColRef;

/**
 * 
 * @author xjiang
 * 
 */
public class TupleInfo {

    private final Map fieldMap;
    private final Map columnMap;
    private final List fields;
    private final List columns;
    private final List dataTypes;

    public TupleInfo() {
        fieldMap = new HashMap();
        columnMap = new HashMap();
        fields = new ArrayList();
        columns = new ArrayList();
        dataTypes = new ArrayList();
    }

    public TblColRef getColumn(String fieldName) {
        int idx = getFieldIndex(fieldName);
        return columns.get(idx);
    }

    public int getColumnIndex(TblColRef col) {
        return columnMap.get(col);
    }

    public String getDataType(String fieldName) {
        int idx = getFieldIndex(fieldName);
        return dataTypes.get(idx);
    }

    public String getDataType(int idx) {
        return dataTypes.get(idx);
    }

    public int getFieldIndex(String fieldName) {
        return fieldMap.get(fieldName);
    }

    public String getFieldName(TblColRef col) {
        int idx = columnMap.get(col);
        return fields.get(idx);
    }

    public boolean hasColumn(TblColRef col) {
        return columnMap.containsKey(col);
    }

    public void setField(String fieldName, TblColRef col, String dataType, int index) {
        fieldMap.put(fieldName, index);
        if (col != null)
            columnMap.put(col, index);

        if (fields.size() > index)
            fields.set(index, fieldName);
        else
            fields.add(index, fieldName);

        if (columns.size() > index)
            columns.set(index, col);
        else
            columns.add(index, col);

        if (dataTypes.size() > index)
            dataTypes.set(index, dataType);
        else
            dataTypes.add(index, dataType);
    }

    public int size() {
        return fields.size();
    }

    public List getAllFields() {
        return fields;
    }

    public List getAllColumns() {
        return columns;
    }

}