water.util

Class PojoUtils

java.lang.Object

water.util.PojoUtils

public class PojoUtils
extends java.lang.Object

POJO utilities which cover cases similar to but not the same as Apache Commons PojoUtils.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PojoUtils.FieldNaming

Constructor Summary

Constructors

Constructor and Description
PojoUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	arraysEquals(java.lang.Object a, java.lang.Object b) Helper for Arrays.equals().
static void	copyProperties(java.lang.Object dest, java.lang.Object origin, PojoUtils.FieldNaming field_naming) Copy properties "of the same name" from one POJO to the other.
static void	copyProperties(java.lang.Object dest, java.lang.Object origin, PojoUtils.FieldNaming field_naming, java.lang.String[] skip_fields) Copy properties "of the same name" from one POJO to the other.
static void	copyProperties(java.lang.Object dest, java.lang.Object origin, PojoUtils.FieldNaming field_naming, java.lang.String[] skip_fields, java.lang.String[] only_fields) Copy properties "of the same name" from one POJO to the other.
static boolean	equals(java.lang.Object a, java.lang.reflect.Field fa, java.lang.Object b, java.lang.reflect.Field fb)
static <T> T	fillFromJson(T o, java.lang.String json) Take a object which potentially has default values for some fields and set only those fields which are in the supplied JSON string.
static void	filterFields(java.lang.Object o, java.lang.String includes, java.lang.String excludes) Null out fields in this schema and its children as specified by parameters __exclude_fields and __include_fields.
static java.lang.reflect.Field	getFieldEvenInherited(java.lang.Object o, java.lang.String name) Gets a public, protected or private Field of an object, even if it's inherited.
static java.lang.Object	getFieldValue(java.lang.Object o, java.lang.String name, PojoUtils.FieldNaming fieldNaming) Returns field value.
static void	setField(java.lang.Object o, java.lang.String fieldName, java.lang.Object value) Set given field to given value on given object.
static void	setField(java.lang.Object o, java.lang.String fieldName, java.lang.Object value, PojoUtils.FieldNaming objectNamingConvention)
static java.lang.String	toJavaDoubleArray(double[] array)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PojoUtils

public PojoUtils()

Method Detail

copyProperties

public static void copyProperties(java.lang.Object dest,
                                  java.lang.Object origin,
                                  PojoUtils.FieldNaming field_naming)

Copy properties "of the same name" from one POJO to the other. If the fields are named consistently (both sides have fields named "_foo" and/or "bar") this acts like Apache Commons PojoUtils.copyProperties(). If one side has leading underscores and the other does not then the names are conformed according to the field_naming parameter. It is also able to map fields between external types like Schema to their corresponding internal types.

Parameters:

dest - Destination POJO

origin - Origin POJO

field_naming - Are the fields named consistently, or does one side have underscores?

copyProperties

public static void copyProperties(java.lang.Object dest,
                                  java.lang.Object origin,
                                  PojoUtils.FieldNaming field_naming,
                                  java.lang.String[] skip_fields)

Copy properties "of the same name" from one POJO to the other. If the fields are named consistently (both sides have fields named "_foo" and/or "bar") this acts like Apache Commons PojoUtils.copyProperties(). If one side has leading underscores and the other does not then the names are conformed according to the field_naming parameter.

Parameters:

dest - Destination POJO

origin - Origin POJO

field_naming - Are the fields named consistently, or does one side have underscores?

skip_fields - Array of origin or destination field names to skip

copyProperties

public static void copyProperties(java.lang.Object dest,
                                  java.lang.Object origin,
                                  PojoUtils.FieldNaming field_naming,
                                  java.lang.String[] skip_fields,
                                  java.lang.String[] only_fields)

Copy properties "of the same name" from one POJO to the other. If the fields are named consistently (both sides have fields named "_foo" and/or "bar") this acts like Apache Commons PojoUtils.copyProperties(). If one side has leading underscores and the other does not then the names are conformed according to the field_naming parameter.

Parameters:

dest - Destination POJO

origin - Origin POJO

field_naming - Are the fields named consistently, or does one side have underscores?

skip_fields - Array of origin or destination field names to skip

only_fields - Array of origin or destination field names to include; ones not in this list will be skipped

filterFields

public static void filterFields(java.lang.Object o,
                                java.lang.String includes,
                                java.lang.String excludes)

Null out fields in this schema and its children as specified by parameters __exclude_fields and __include_fields. NOTE: modifies the scheme tree in place.

equals

public static boolean equals(java.lang.Object a,
                             java.lang.reflect.Field fa,
                             java.lang.Object b,
                             java.lang.reflect.Field fb)

setField

public static void setField(java.lang.Object o,
                            java.lang.String fieldName,
                            java.lang.Object value,
                            PojoUtils.FieldNaming objectNamingConvention)

setField

public static void setField(java.lang.Object o,
                            java.lang.String fieldName,
                            java.lang.Object value)

Set given field to given value on given object.

Parameters:

o - object to modify

fieldName - name of field to set

value - value to write the the field

getFieldEvenInherited

public static java.lang.reflect.Field getFieldEvenInherited(java.lang.Object o,
                                                            java.lang.String name)
                                                     throws java.lang.NoSuchFieldException,
                                                            java.lang.SecurityException

Gets a public, protected or private Field of an object, even if it's inherited. Neither Class.getField nor Class.getDeclaredField do this. NOTE: the caller must call f.setAccessible(true) if they want to make private fields accessible.

Throws:

java.lang.NoSuchFieldException

java.lang.SecurityException

getFieldValue

public static java.lang.Object getFieldValue(java.lang.Object o,
                                             java.lang.String name,
                                             PojoUtils.FieldNaming fieldNaming)

Returns field value.

Parameters:

o - object to read field value from

name - name of field to read

Returns:

returns field value

Throws:

java.lang.IllegalArgumentException - when o is null, or field is not found, or field cannot be read.

fillFromJson

public static <T> T fillFromJson(T o,
                                 java.lang.String json)

Take a object which potentially has default values for some fields and set only those fields which are in the supplied JSON string. NOTE: Doesn't handle array fields yet.

arraysEquals

public static boolean arraysEquals(java.lang.Object a,
                                   java.lang.Object b)

Helper for Arrays.equals().

toJavaDoubleArray

public static java.lang.String toJavaDoubleArray(double[] array)