tech.bitey.dataframe

Class ColumnType<E>

java.lang.Object

tech.bitey.dataframe.ColumnType<E>

public class ColumnType<E>
extends Object

Represents the possible element types supported by the concrete Column implementation. One of:

• BOOLEAN
• DATE
• DATETIME
• DOUBLE
• FLOAT
• INT
• LONG
• STRING
• DECIMAL

Author:

biteytech@protonmail.com

Field Summary

Fields

Modifier and Type	Field and Description
static ColumnType<Boolean>	BOOLEAN The type for BooleanColumn
static ColumnType<Byte>	BYTE The type for StringColumn
static ColumnType<LocalDate>	DATE The type for DateColumn
static ColumnType<LocalDateTime>	DATETIME The type for DateTimeColumn
static ColumnType<BigDecimal>	DECIMAL The type for DecimalColumn
static ColumnType<Double>	DOUBLE The type for DoubleColumn
static ColumnType<Float>	FLOAT The type for FloatColumn
static ColumnType<Integer>	INT The type for IntColumn
static ColumnType<Long>	LONG The type for LongColumn
static ColumnType<Short>	SHORT The type for ShortColumn
static ColumnType<String>	STRING The type for StringColumn

Method Summary

Modifier and Type	Method and Description
<T> ColumnBuilder<T>	builder() Returns a builder for this column type.
<T> ColumnBuilder<T>	builder(int characteristic) Returns a builder for this column type with the specified characteristic.
Column<?>	nullColumn(int size) Returns a Column of the corresponding type that only contains nulls.
Object	parse(String string) Parse a string to an element according to the following logic: Parsing Logic Column Type Element Type Logic BOOLEAN BooleanTRUE if string equals "true" or "Y", ignoring case DATE LocalDate if string has length 8, treat as yyyymmdd int value otherwise, LocalDate.parse(CharSequence) DATETIME LocalDateTimeLocalDateTime.parse(CharSequence) DOUBLE DoubleDouble.valueOf(String) FLOAT FloatFloat.valueOf(String) INT IntegerInteger.valueOf(String) LONG LongLong.valueOf(String) STRING String as-is DECIMAL BigDecimalBigDecimal.BigDecimal(String) Methods inherited from class java.lang.Object clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait Field Detail BOOLEAN public static final ColumnType<Boolean> BOOLEAN The type for BooleanColumn DATE public static final ColumnType<LocalDate> DATE The type for DateColumn DATETIME public static final ColumnType<LocalDateTime> DATETIME The type for DateTimeColumn DOUBLE public static final ColumnType<Double> DOUBLE The type for DoubleColumn FLOAT public static final ColumnType<Float> FLOAT The type for FloatColumn INT public static final ColumnType<Integer> INT The type for IntColumn LONG public static final ColumnType<Long> LONG The type for LongColumn SHORT public static final ColumnType<Short> SHORT The type for ShortColumn STRING public static final ColumnType<String> STRING The type for StringColumn BYTE public static final ColumnType<Byte> BYTE The type for StringColumn DECIMAL public static final ColumnType<BigDecimal> DECIMAL The type for DecimalColumn Method Detail builder public <T> ColumnBuilder<T> builder() Returns a builder for this column type. Type Parameters: T - the corresponding element type Returns: a builder for this column type. builder public <T> ColumnBuilder<T> builder(int characteristic) Returns a builder for this column type with the specified characteristic. Type Parameters: T - the column's element type Parameters: characteristic - - one of: 0 (zero) - no constraints on the elements to be added to the column NONNULL SORTED DISTINCT Returns: a builder for this column type. Throws: IllegalArgumentException - if characteristic is not valid nullColumn public Column<?> nullColumn(int size) Returns a Column of the corresponding type that only contains nulls. Parameters: size - the number of nulls in the column Returns: a Column of the corresponding type that only contains nulls. parse public Object parse(String string) Parse a string to an element according to the following logic: Parsing Logic Column Type Element Type Logic BOOLEAN Boolean TRUE if string equals "true" or "Y", ignoring case DATE LocalDate if string has length 8, treat as yyyymmdd int value otherwise, LocalDate.parse(CharSequence) DATETIME LocalDateTime LocalDateTime.parse(CharSequence) DOUBLE Double Double.valueOf(String) FLOAT Float Float.valueOf(String) INT Integer Integer.valueOf(String) LONG Long Long.valueOf(String) STRING String as-is DECIMAL BigDecimal BigDecimal.BigDecimal(String) Parameters: string - - the string to parse Returns: the parsed element Skip navigation links Overview Package Class Use Tree Deprecated Index Help Prev Class Next Class Frames No Frames All Classes Summary: Nested | Field | Constr | Method Detail: Field | Constr | Method Copyright © 2020. All rights reserved.