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package io.qt.qbs.tools.utils;

import com.sun.source.util.Trees;

import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.ProcessingEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import java.util.Set;

@SupportedAnnotationTypes("*")
public class ArtifactProcessor extends AbstractProcessor {
    private final ArtifactScanner treeScanner;
    private Trees trees;

    public ArtifactProcessor(final ArtifactScanner treeScanner) {
        this.treeScanner = treeScanner;
    }

    @Override
    public synchronized void init(ProcessingEnvironment processingEnv) {
        super.init(processingEnv);
        trees = Trees.instance(processingEnv);
    }

    @Override
    public boolean process(final Set<? extends TypeElement> types, final RoundEnvironment environment) {
        treeScanner.init(processingEnv);
        if (!environment.processingOver()) {
            for (final Element element : environment.getRootElements()) {
                treeScanner.scan(trees.getPath(element), trees);
            }
        }
        return true;
    }

    @Override
    public SourceVersion getSupportedSourceVersion() {
        return treeScanner.getSourceVersion();
    }
}
