BuilderPreDefinedInnerClassFieldProcessor.java

package de.plushnikov.intellij.plugin.processor.clazz.builder;

import com.intellij.psi.PsiAnnotation;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiField;
import com.intellij.psi.PsiMethod;
import de.plushnikov.intellij.plugin.processor.handler.BuilderHandler;
import de.plushnikov.intellij.plugin.processor.handler.BuilderInfo;
import de.plushnikov.intellij.plugin.util.PsiClassUtil;
import lombok.Builder;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;

/**
 * Creates methods for a builder inner class if it is predefined.
 *
 * @author Michail Plushnikov
 */
public class BuilderPreDefinedInnerClassFieldProcessor extends AbstractBuilderPreDefinedInnerClassProcessor {

  public BuilderPreDefinedInnerClassFieldProcessor(@NotNull BuilderHandler builderHandler) {
    super(builderHandler, PsiField.class, Builder.class);
  }

  @Override
  protected void generatePsiElements(@NotNull PsiClass psiParentClass, @Nullable PsiMethod psiParentMethod, @NotNull PsiClass psiBuilderClass, @NotNull PsiAnnotation psiAnnotation, @NotNull List<? super PsiElement> target) {
    final Collection<String> existedFieldNames = PsiClassUtil.collectClassFieldsIntern(psiBuilderClass).stream().map(PsiField::getName).collect(Collectors.toSet());

    final List<BuilderInfo> builderInfos = builderHandler.createBuilderInfos(psiAnnotation, psiParentClass, psiParentMethod, psiBuilderClass);
    builderInfos.stream().filter(info -> info.notAlreadyExistingField(existedFieldNames)).map(BuilderInfo::renderBuilderFields).forEach(target::addAll);
  }
}