com.github.pukkaone.jsp

Class ValueResolver

java.lang.Object

com.github.pukkaone.jsp.ValueResolver

public class ValueResolver
extends java.lang.Object

Resolves a property name to a value by reading from a model object. Given a property name key, the following mechanisms are tried in this order:

• If the object is a Map, then call Map.get(java.lang.Object) to get the value using the string key as the key.
• If the object has a method named key with non-void return type, then call the method.
• If the object has a method named getkey with the first letter of key capitalized and non-void return type, then call the method.
• If the object has a field named key, then return the field value.

If the value acquired from the previous steps is an object implementing Callable, then the return value from invoking it will be used.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	ValueResolver.Key (model class, property name) combination used to find value fetchers from cache
protected static interface	ValueResolver.ValueFetcher

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.util.Map<ValueResolver.Key,ValueResolver.ValueFetcher>	fetcherCache
protected static ValueResolver.ValueFetcher	MAP_FETCHER
static java.lang.Object	NOT_FOUND special value indicating property was not found

Constructor Summary

Constructors

Constructor and Description
ValueResolver(java.lang.Object model) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
protected static ValueResolver.ValueFetcher	createFetcher(ValueResolver.Key key)
protected ValueResolver.ValueFetcher	getFetcher(ValueResolver.Key key)
protected static java.lang.reflect.Field	getField(java.lang.Class<?> clazz, java.lang.String name)
protected static java.lang.reflect.Method	getMethod(java.lang.Class<?> clazz, java.lang.String name)
java.lang.Object	getValue(java.lang.String name) Resolves name to value from the object.

Methods inherited from class java.lang.Object

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

Field Detail

NOT_FOUND

public static final java.lang.Object NOT_FOUND

special value indicating property was not found

MAP_FETCHER

protected static final ValueResolver.ValueFetcher MAP_FETCHER

fetcherCache

protected static java.util.Map<ValueResolver.Key,ValueResolver.ValueFetcher> fetcherCache

Constructor Detail

ValueResolver

public ValueResolver(java.lang.Object model)

Constructor

Parameters:

model - object to read values from

Method Detail

getMethod

protected static java.lang.reflect.Method getMethod(java.lang.Class<?> clazz,
                                 java.lang.String name)

getField

protected static java.lang.reflect.Field getField(java.lang.Class<?> clazz,
                               java.lang.String name)

createFetcher

protected static ValueResolver.ValueFetcher createFetcher(ValueResolver.Key key)

getFetcher

protected ValueResolver.ValueFetcher getFetcher(ValueResolver.Key key)

getValue

public java.lang.Object getValue(java.lang.String name)

Resolves name to value from the object.

Parameters:

name - name to resolve

Returns:

value