
com.hydraql.common.meta.HBaseTableSchema Maven / Gradle / Ivy
/*
* 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.hydraql.common.meta;
import com.hydraql.common.exception.InvalidTableModelClassException;
import com.hydraql.common.lang.Preconditions;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
/**
* @author leojie 2022/11/20 11:07
*/
public class HBaseTableSchema implements Serializable {
private static final long serialVersionUID = -1129697459766514524L;
private final Class> tableClass;
private final Constructor> defaultConstructor;
private final String tableName;
private final List fields;
private transient int rowCount;
private HBaseTableSchema(Builder builder) {
this.tableClass = builder.tableClass;
this.defaultConstructor = builder.defaultConstructor;
this.tableName = builder.tableName;
this.fields = new LinkedList<>();
}
public static Builder newBuilder(Class> tableClass) {
return new Builder(tableClass);
}
public static class Builder {
private final Class> tableClass;
private Constructor> defaultConstructor;
private String tableName;
private Builder(Class> tableClass) {
this.tableClass = tableClass;
}
public Builder setDefaultConstructor(Constructor> defaultConstructor) {
this.defaultConstructor = defaultConstructor;
return this;
}
public Builder setTableName(String tableName) {
this.tableName = tableName;
return this;
}
public HBaseTableSchema build() {
return new HBaseTableSchema(this);
}
}
public Class> getTableClass() {
return tableClass;
}
public Constructor> getDefaultConstructor() {
return defaultConstructor;
}
public String getTableName() {
return tableName;
}
public List getFields() {
if (fields.isEmpty()) {
throw new InvalidTableModelClassException(String
.format("No fields defined for the model class [%s].", this.getTableClass().getName()));
}
return Collections.unmodifiableList(this.fields);
}
public void appendColumnMeta(HBaseField field) {
Preconditions.checkState(field != null, "The field is null");
if (field.isRowKey()) {
rowCount++;
if (rowCount > 1) {
throw new InvalidTableModelClassException(String.format(
"The model class [%s] contains more than one row key.", this.getTableClass().getName()));
}
fields.add(0, field);
return;
}
fields.add(field);
}
}
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