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package org.bndtools.templating.engine.mustache;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import com.github.mustachejava.Binding;
import com.github.mustachejava.Code;
import com.github.mustachejava.ObjectHandler;
import com.github.mustachejava.TemplateContext;
import com.github.mustachejava.reflect.BaseObjectHandler;
import com.github.mustachejava.util.Wrapper;
/**
* A Mustache ObjectHandler that accumulates the names of requested parameters
*/
class AccumulateNamesObjectHandler extends BaseObjectHandler {
private final ObjectHandler delegateHandler;
private final Set names = new HashSet<>();
AccumulateNamesObjectHandler(ObjectHandler delegateHandler) {
this.delegateHandler = delegateHandler;
}
@Override
public Wrapper find(final String name, Object[] scopes) {
final Wrapper delegateWrapper = delegateHandler.find(name, scopes);
return scopes1 -> {
names.add(name);
return delegateWrapper.call(scopes1);
};
}
@Override
public Binding createBinding(final String name, TemplateContext context, Code code) {
final Binding delegateBinding = delegateHandler.createBinding(name, context, code);
return scopes -> {
names.add(name);
return delegateBinding.get(scopes);
};
}
public Set getNames() {
return Collections.unmodifiableSet(names);
}
}
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