com.googlecode.objectify.impl.translate

Class StringTranslatorFactory

java.lang.Object

com.googlecode.objectify.impl.translate.ValueTranslatorFactory<String,Object>

com.googlecode.objectify.impl.translate.StringTranslatorFactory

All Implemented Interfaces:

TranslatorFactory<String,Object>

public class StringTranslatorFactory
extends ValueTranslatorFactory<String,Object>

Knows how to convert Strings. Datastore representation might be String or it might be Text. Will work with anything that's in the datastore just by calling toString() on what we get back; convenient for converting between say Number and the String representation, possibly dangerous otherwise.

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_STRING_BYTES Maximum number of BYTES we can store in a String before we have to convert to Text.
static int	SAFE_STRING_CHARS Google isn't explicit that UTF-8 encoding is used, but it's a safe assumption.

Constructor Summary

Constructors

Constructor and Description
StringTranslatorFactory()

Method Summary

Modifier and Type	Method and Description
protected ValueTranslator<String,Object>	createValueTranslator(TypeKey<String> tk, CreateContext ctx, Path path) Create a translator, knowing that we have the appropriate type.

Methods inherited from class com.googlecode.objectify.impl.translate.ValueTranslatorFactory

create

Methods inherited from class java.lang.Object

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

Field Detail

MAX_STRING_BYTES

public static final int MAX_STRING_BYTES

Maximum number of BYTES we can store in a String before we have to convert to Text.

See Also:

Constant Field Values

SAFE_STRING_CHARS

public static final int SAFE_STRING_CHARS

Google isn't explicit that UTF-8 encoding is used, but it's a safe assumption. Worst case is 4 bytes per character. So if we have more than that number of chars, we have to convert to UTF-8 to test the actual length.

See Also:

Constant Field Values

Constructor Detail

StringTranslatorFactory

public StringTranslatorFactory()

Method Detail

createValueTranslator

protected ValueTranslator<String,Object> createValueTranslator(TypeKey<String> tk,
                                                               CreateContext ctx,
                                                               Path path)

Description copied from class: ValueTranslatorFactory

Create a translator, knowing that we have the appropriate type. You don't need to check for type matching.

Specified by:

createValueTranslator in class ValueTranslatorFactory<String,Object>

Parameters:

tk - type is guaranteed to erase to something assignable to Class