com.scalar.db.sql.statement.DropTableStatement 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 DropTableStatement
implements DdlStatement, NamespaceNameOmittable {
public final TableRef table;
public final boolean ifExists;
private DropTableStatement(TableRef table, boolean ifExists) {
this.table = Objects.requireNonNull(table);
this.ifExists = ifExists;
}
@Override
public String toSql() {
StringBuilder builder = new StringBuilder("DROP TABLE ");
if (ifExists) {
builder.append("IF EXISTS ");
}
StatementUtils.appendTable(builder, table);
return builder.toString();
}
@Override
public R accept(StatementVisitor visitor, C context) {
return visitor.visit(this, context);
}
@Override
public R accept(DdlStatementVisitor visitor, C context) {
return visitor.visit(this, context);
}
@Override
public boolean namespaceNameOmitted() {
return table.namespaceName == null;
}
@Override
public DropTableStatement setNamespaceNameIfOmitted(String namespaceName) {
if (namespaceNameOmitted()) {
return create(TableRef.of(namespaceName, table.tableName), ifExists);
}
return this;
}
@Override
public String toString() {
return toSql();
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof DropTableStatement)) {
return false;
}
DropTableStatement that = (DropTableStatement) o;
return ifExists == that.ifExists && Objects.equals(table, that.table);
}
@Override
public int hashCode() {
return Objects.hash(table, ifExists);
}
public static DropTableStatement create(TableRef table, boolean ifExists) {
return new DropTableStatement(table, ifExists);
}
}