Class TypeCoercerImpl
- java.lang.Object
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- org.apache.tapestry5.commons.internal.util.LockSupport
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- org.apache.tapestry5.commons.internal.services.TypeCoercerImpl
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- All Implemented Interfaces:
TypeCoercer
public class TypeCoercerImpl extends LockSupport implements TypeCoercer
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Constructor Summary
Constructors Constructor Description TypeCoercerImpl(java.util.Map<CoercionTuple.Key,CoercionTuple> tuples)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidclearCache()Clears cached information stored by the TypeCoercer.java.lang.Objectcoerce(java.lang.Object input, java.lang.Class targetType)Performs a coercion from an input type to a desired output type.<S,T>
java.lang.Stringexplain(java.lang.Class<S> sourceType, java.lang.Class<T> targetType)Used primarily inside test suites, this method performs the same steps asTypeCoercer.coerce(Object, Class), but returns a string describing the series of coercions, such as "Object --> String --> Long --> Integer".<S,T>
Coercion<S,T>getCoercion(java.lang.Class<S> sourceType, java.lang.Class<T> targetType)Given a source and target type, computes the coercion that will be used.-
Methods inherited from class org.apache.tapestry5.commons.internal.util.LockSupport
acquireReadLock, downgradeWriteLockToReadLock, releaseReadLock, releaseWriteLock, takeWriteLock, upgradeReadLockToWriteLock
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Constructor Detail
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TypeCoercerImpl
public TypeCoercerImpl(java.util.Map<CoercionTuple.Key,CoercionTuple> tuples)
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Method Detail
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coerce
public java.lang.Object coerce(java.lang.Object input, java.lang.Class targetType)
Description copied from interface:TypeCoercerPerforms a coercion from an input type to a desired output type. When the target type is a primitive, the actual conversion will be to the equivalent wrapper type. In some cases, the TypeCoercer will need to search for an appropriate coercion, and may even combine existing coercions to form new ones; in those cases, the results of the search are cached. The TypeCoercer also caches the results of a coercion search.- Specified by:
coercein interfaceTypeCoercertargetType- defines the target type- Returns:
- the coerced value
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getCoercion
public <S,T> Coercion<S,T> getCoercion(java.lang.Class<S> sourceType, java.lang.Class<T> targetType)
Description copied from interface:TypeCoercerGiven a source and target type, computes the coercion that will be used. Note: holding the returned coercion past the time when the cache is cleared can cause a memory leak, especially in the context of live reloading (wherein holding a reference to a single class make keep an entire ClassLoader from being reclaimed).- Specified by:
getCoercionin interfaceTypeCoercer- Type Parameters:
S- source type (input)T- target type (output)- Parameters:
sourceType- type to coerce fromtargetType- defines the target type- Returns:
- the coercion that will ultimately be used
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explain
public <S,T> java.lang.String explain(java.lang.Class<S> sourceType, java.lang.Class<T> targetType)
Description copied from interface:TypeCoercerUsed primarily inside test suites, this method performs the same steps asTypeCoercer.coerce(Object, Class), but returns a string describing the series of coercions, such as "Object --> String --> Long --> Integer".- Specified by:
explainin interfaceTypeCoercer- Type Parameters:
S- source type (input)T- target type (output)- Parameters:
sourceType- the source coercion type (use void.class for coercions from null)targetType- defines the target type- Returns:
- a string identifying the series of coercions, or the empty string if no coercion is necessary
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clearCache
public void clearCache()
Description copied from interface:TypeCoercerClears cached information stored by the TypeCoercer.- Specified by:
clearCachein interfaceTypeCoercer
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