Interface DataBinder.ValueResolver

All Known Implementing Classes:

ServletRequestDataBinder.ServletRequestValueResolver

Enclosing class:

DataBinder

public static interface DataBinder.ValueResolver

Strategy for constructor binding to look up the values to bind to a given constructor parameter.

Author:

Rod Johnson, Juergen Hoeller, Rob Harrop, Stephane Nicoll, Kazuki Shimizu, Sam Brannen

Method Summary

Modifier and Type	Method	Description
Set<String>	getNames()	Return the names of all property values.
@Nullable Object	resolveValue(String name, Class<?> type)	Resolve the value for the given name and target parameter type.

Method Details

resolveValue

@Nullable Object resolveValue(String name,
 Class<?> type)

Resolve the value for the given name and target parameter type.

Parameters:

name - the name to use for the lookup, possibly a nested path for constructor parameters on nested objects

type - the target type, based on the constructor parameter type

Returns:

the resolved value, possibly null if none found

getNames

Set<String> getNames()

Return the names of all property values.

Useful for proactive checks whether there are property values nested further below the path for a constructor arg. If not then the constructor arg can be considered missing and not to be instantiated.

Since:

6.1.2