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package org.glassfish.jersey.internal.inject;
import java.util.Objects;
import java.util.function.Consumer;
/**
* The descriptor holder for an externally provided DI providers. Using this interface DI provider is able to provider his own
* descriptor which can be used and returned to the DI provider in further processing.
* <p>
* This is useful in the case of caching where an algorithm is able to store and subsequently provide for an injection the already
* resolved descriptor of the same value.
*/
public class ForeignDescriptorImpl implements ForeignDescriptor {
private static final Consumer<Object> NOOP_DISPOSE_INSTANCE = instance -> {};
private final Object foreignDescriptor;
private final Consumer<Object> disposeInstance;
/**
* Constructor accepts a descriptor of the DI provider and to be able to provide it in further processing.
*
* @param foreignDescriptor DI provider's descriptor.
*/
public ForeignDescriptorImpl(Object foreignDescriptor) {
this(foreignDescriptor, NOOP_DISPOSE_INSTANCE);
}
/**
* Constructor accepts a descriptor of the DI provider and to be able to provide it in further processing along with
* dispose mechanism to destroy the objects corresponding the given {@code foreign key}.
*
* @param foreignDescriptor DI provider's descriptor.
*/
public ForeignDescriptorImpl(Object foreignDescriptor, Consumer<Object> disposeInstance) {
this.foreignDescriptor = foreignDescriptor;
this.disposeInstance = disposeInstance;
}
@Override
public Object get() {
return foreignDescriptor;
}
@Override
public void dispose(Object instance) {
disposeInstance.accept(instance);
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (!(o instanceof ForeignDescriptorImpl)) {
return false;
}
final ForeignDescriptorImpl that = (ForeignDescriptorImpl) o;
return foreignDescriptor.equals(that.foreignDescriptor);
}
@Override
public int hashCode() {
return foreignDescriptor.hashCode();
}
}