com.scalar.db.sql.statement.DescribeStatement Maven / Gradle / Ivy
package com.scalar.db.sql.statement;
import com.scalar.db.sql.TableRef;
import java.util.Objects;
import javax.annotation.concurrent.Immutable;
@Immutable
public class DescribeStatement
implements CommandStatement, NamespaceNameOmittable {
public final TableRef table;
private DescribeStatement(TableRef table) {
this.table = Objects.requireNonNull(table);
}
@Override
public String toSql() {
StringBuilder builder = new StringBuilder("DESCRIBE ");
StatementUtils.appendTable(builder, table);
return builder.toString();
}
@Override
public R accept(CommandStatementVisitor visitor, C context) {
return visitor.visit(this, context);
}
@Override
public R accept(StatementVisitor visitor, C context) {
return visitor.visit(this, context);
}
@Override
public boolean namespaceNameOmitted() {
return table.namespaceName == null;
}
@Override
public DescribeStatement setNamespaceNameIfOmitted(String namespaceName) {
if (namespaceNameOmitted()) {
return create(TableRef.of(namespaceName, table.tableName));
}
return this;
}
@Override
public String toString() {
return toSql();
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof DescribeStatement)) {
return false;
}
DescribeStatement that = (DescribeStatement) o;
return Objects.equals(table, that.table);
}
@Override
public int hashCode() {
return Objects.hash(table);
}
public static DescribeStatement create(TableRef table) {
return new DescribeStatement(table);
}
}