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DelegatingNodeRendererFactoryWrapper.java
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DelegatingNodeRendererFactoryWrapper.java
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package com.vladsch.flexmark.html2md.converter;
import com.vladsch.flexmark.util.data.DataHolder;
import com.vladsch.flexmark.util.dependency.Dependent;
import org.jetbrains.annotations.Nullable;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.function.Function;
/**
* Factory for instantiating new node renderers with dependencies
*/
class DelegatingNodeRendererFactoryWrapper implements Function<DataHolder, HtmlNodeRenderer>, Dependent, DelegatingNodeRendererFactory {
final private HtmlNodeRendererFactory nodeRendererFactory;
private List<DelegatingNodeRendererFactoryWrapper> nodeRenderers;
private Set<Class<?>> myDelegates = null;
public DelegatingNodeRendererFactoryWrapper(List<DelegatingNodeRendererFactoryWrapper> nodeRenderers, HtmlNodeRendererFactory nodeRendererFactory) {
this.nodeRendererFactory = nodeRendererFactory;
this.nodeRenderers = nodeRenderers;
}
@Override
public HtmlNodeRenderer apply(DataHolder options) {
return nodeRendererFactory.apply(options);
}
public HtmlNodeRendererFactory getFactory() {
return nodeRendererFactory;
}
@Override
public Set<Class<?>> getDelegates() {
return nodeRendererFactory instanceof DelegatingNodeRendererFactory ? ((DelegatingNodeRendererFactory) nodeRendererFactory).getDelegates() : null;
}
@Nullable
@Override
final public Set<Class<?>> getAfterDependents() {
return null;
}
@Nullable
@Override
public Set<Class<?>> getBeforeDependents() {
if (myDelegates == null && nodeRenderers != null) {
Set<Class<?>> delegates = getDelegates();
if (delegates != null) {
myDelegates = new HashSet<>();
for (DelegatingNodeRendererFactoryWrapper factory : nodeRenderers) {
if (delegates.contains(factory.getFactory().getClass())) {
myDelegates.add(factory.getFactory().getClass());
}
}
}
// release reference
nodeRenderers = null;
}
return myDelegates;
}
@Override
final public boolean affectsGlobalScope() {
return false;
}
}