Simone Tripodi created JCR-3489:
-----------------------------------
Summary: enhance get/set Property value access, expanding the
supported types set
Key: JCR-3489
URL: https://issues.apache.org/jira/browse/JCR-3489
Project: Jackrabbit Content Repository
Issue Type: Improvement
Components: jackrabbit-jcr-commons
Affects Versions: 2.5.2
Reporter: Simone Tripodi
Priority: Minor
Fix For: 2.6
The idea is having a small EDSL that simplifies the access to {{Property}}
value, so rather than coding the following:
{code}
Property property = ...;
boolean oldValue = property.getBoolean();
boolean newValue = !oldValue;
property.setValue(newValue);
{code}
it could be simplified specifying wich type the users are interested on:
{code}
PropertyAccessors propertiesAccessor = ...;
boolean oldValue = propertiesAccessor.get(property).to(boolean.class);
boolean newValue = !oldValue;
propertiesAccessor.set(newValue).to(property);
{code}
where {{PropertiesAccessor}} is the delegated to handle right types handling.
By default it supports default {{Property}} value types, but it could be
extended.
It could happen also that users would like to support a larger set of types,
maybe performing conversions to/from default {{Property}} types, so rather than
inserting the custom code in the app when required, they could use the
{{PropertiesAccessor}}; they first need to register the Accessor implementation
to (un)bind the type:
{code}
propertiesAccessor.handle(URI.class).with(new PropertyAccessor<URI>() {
@Override
public void set(URI value, Property target) throws
ValueFormatException, RepositoryException {
// ...
}
@Override
public URI get(Property property) throws ValueFormatException,
RepositoryException {
// TODO ...
return null;
}
});
{code}
so they can use the accessor via the {{PropertiesAccessor}}:
{code}
URI oldValue = propertiesAccessor.get(property).to(URI.class);
URI newValue = URI.create("http://jackrabbit.apache.org/";);
propertiesAccessor.set(newValue).to(property);
{code}
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