org.yarnandtail.andhow.load

Class FixedValueLoader

java.lang.Object

org.yarnandtail.andhow.load.BaseLoader

org.yarnandtail.andhow.load.FixedValueLoader

All Implemented Interfaces:

Loader, ReadLoader

Direct Known Subclasses:

StdFixedValueLoader

public class FixedValueLoader
extends BaseLoader
implements ReadLoader

A utility loader that is used internally to put fixed values into the effective list of values. This loader does not trim incoming values for String type properties - they are assumed to already be in final form. This loader considers it a problem to be passed unrecognized properties and will throw a RuntimeException if that happens.

Author:

eeverman

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	unknownPropertyAProblem
protected List<PropertyValue>	values

Constructor Summary

Constructors

Constructor and Description
FixedValueLoader()

Method Summary

Modifier and Type	Method and Description
String	getLoaderDialect() The type dialect of the loader.
String	getLoaderType() The type of the loader, such as JNDI, PropertyFile, SystemProperty, etc..
String	getSpecificLoadDescription() For this particular load, where was info loaded from? This may vary from run to run based on config params.
boolean	isTrimmingRequiredForStringValues() If true, values for string properties are trimmed by the Trimmer of the property they are associated with.
boolean	isUnknownPropertyAProblem() If true, an unrecognized name is considered a problem that will stop application startup.
LoaderValues	load(StaticPropertyConfigurationInternal appConfigDef, ValidatedValuesWithContext existingValues) Builds up a list of LoaderValues by loading property values from a configuration source.
void	releaseResources() Release any resources held by this loader.
void	setPropertyValues(List<PropertyValue> values)
void	setPropertyValues(PropertyValue... values)
void	setUnknownPropertyAProblem(boolean isAProblem) If true, an unrecognized property name is considered a problem/error.

Methods inherited from class org.yarnandtail.andhow.load.BaseLoader

attemptToAdd, attemptToAdd, createValue, findDuplicateProperty, getClassConfig, getConfigSamplePrinter, getInstanceConfig

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.yarnandtail.andhow.api.Loader

getClassConfig, getConfigSamplePrinter, getInstanceConfig

Field Detail

unknownPropertyAProblem

protected boolean unknownPropertyAProblem

values

protected List<PropertyValue> values

Constructor Detail

FixedValueLoader

public FixedValueLoader()

Method Detail

setPropertyValues

public void setPropertyValues(List<PropertyValue> values)

setPropertyValues

public void setPropertyValues(PropertyValue... values)

load

public LoaderValues load(StaticPropertyConfigurationInternal appConfigDef,
                         ValidatedValuesWithContext existingValues)

Description copied from interface: Loader

Builds up a list of LoaderValues by loading property values from a configuration source. Loaders find and load values and associate them with the correct Property. If there is a problem while doing that, they register one or more LoaderProblems in the returned LoaderValues. Validation of Property values is not Loader's responsibility and will be handled outside this method.

Specified by:

load in interface Loader

Returns:

isTrimmingRequiredForStringValues

public boolean isTrimmingRequiredForStringValues()

Description copied from interface: Loader

If true, values for string properties are trimmed by the Trimmer of the property they are associated with. If false, no trimming is done. Non-String type property values (like Integer or Date type values) are not affected by this. Loaders that read from text files need to trim values to separate white space and carriage returns from the value. Loaders that read from more tightly defined sources, like reading properties from java.lang.System.getProperties(), can assume that trimming has already happened.

Specified by:

isTrimmingRequiredForStringValues in interface Loader

Returns:

getSpecificLoadDescription

public String getSpecificLoadDescription()

Description copied from interface: Loader

For this particular load, where was info loaded from? This may vary from run to run based on config params. For instance, The PropFileLoader will look multiple places to find a properties file. This method should return the actual location it was found. Assume the text is prefixed with "This loader loaded from: ". An example would be "/home/user/config/my-props.properties" No ending punctuation should be used.

Specified by:

getSpecificLoadDescription in interface Loader

Returns:

getLoaderType

public String getLoaderType()

Description copied from interface: Loader

The type of the loader, such as JNDI, PropertyFile, SystemProperty, etc.. The actual return value is arbitrary, but should be consistent between loaders of the same type. The values returned by getLoaderType and getLoaderDialect are used to removed duplicate loader types when printing sample files. If two loader instances are of the same type and dialect, only one will print the sample file.

Specified by:

getLoaderType in interface Loader

Returns:

Must never returns null.

getLoaderDialect

public String getLoaderDialect()

Description copied from interface: Loader

The type dialect of the loader. For property files, this might be either KeyValuePair or xml for example. The actual return value is arbitrary, but should be consistent between loaders of the same type and dialect. The values returned by getLoaderType and getLoaderDialect are used to removed duplicate loader types when printing sample files. If two loader instances are of the same type and dialect, only one will print the sample file.

Specified by:

getLoaderDialect in interface Loader

Returns:

May return null if there is no meaningful dialect for this type.

setUnknownPropertyAProblem

public void setUnknownPropertyAProblem(boolean isAProblem)

Description copied from interface: ReadLoader

If true, an unrecognized property name is considered a problem/error.

Specified by:

setUnknownPropertyAProblem in interface ReadLoader

isUnknownPropertyAProblem

public boolean isUnknownPropertyAProblem()

Description copied from interface: ReadLoader

If true, an unrecognized name is considered a problem that will stop application startup. This is a safety feature because a unrecognized property name in a properties file could be a typo. For other property sources, however, like System.properties, there are many non-AndHow related values that are expected to be present, so this rule cannot be enforced.

Specified by:

isUnknownPropertyAProblem in interface ReadLoader

Returns:

releaseResources

public void releaseResources()

Description copied from interface: Loader

Release any resources held by this loader. Loaders have done their job after loading values to properties. However, they may be held in memory for auditing and reporting. To prevent holding additional resources in memory, this method is called after loading is complete.

Specified by:

releaseResources in interface Loader

Overrides:

releaseResources in class BaseLoader