io.rdbc.japi.ColumnMetadata Maven / Gradle / Ivy
/*
* Copyright 2016 rdbc contributors
*
* Licensed 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 io.rdbc.japi;
import java.util.Optional;
/**
* Represents column's metadata.
*/
public final class ColumnMetadata {
private final String name;
private final String dbTypeId;
private final Optional> valueClass;
private ColumnMetadata(String name, String dbTypeId, Optional> valueClass) {
this.name = name;
this.dbTypeId = dbTypeId;
this.valueClass = valueClass;
}
/**
* Creates new ColumnMetadata instance.
*
* @param name column name
* @param dbTypeId database vendor identifier of a datatype declared for the column
*/
public static ColumnMetadata of(String name, String dbTypeId) {
return new ColumnMetadata(name, dbTypeId, Optional.empty());
}
/**
* Creates new ColumnMetadata instance.
*
* @param name column name
* @param dbTypeId database vendor identifier of a datatype declared for the column
* @param cls JVM class that a database driver uses to represent values of the column
*/
public static ColumnMetadata of(String name, String dbTypeId, Class cls) {
return new ColumnMetadata(name, dbTypeId, Optional.of(cls));
}
public String getName() {
return name;
}
public String getDbTypeId() {
return dbTypeId;
}
public Optional> getValueClass() {
return valueClass;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ColumnMetadata that = (ColumnMetadata) o;
if (!name.equals(that.name)) return false;
if (!dbTypeId.equals(that.dbTypeId)) return false;
return valueClass.equals(that.valueClass);
}
@Override
public int hashCode() {
int result = name.hashCode();
result = 31 * result + dbTypeId.hashCode();
result = 31 * result + valueClass.hashCode();
return result;
}
@Override
public String toString() {
return "ColumnMetadata(" +
"name='" + name + '\'' +
", dbTypeId='" + dbTypeId + '\'' +
", valueClass=" + valueClass +
')';
}
}