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EqualsAndHashCodeToStringHandler.java
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EqualsAndHashCodeToStringHandler.java
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package de.plushnikov.intellij.plugin.processor.handler;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiAnnotation;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiField;
import com.intellij.psi.PsiMember;
import com.intellij.psi.PsiMethod;
import com.intellij.psi.PsiModifier;
import com.intellij.psi.PsiType;
import de.plushnikov.intellij.plugin.thirdparty.LombokUtils;
import de.plushnikov.intellij.plugin.util.LombokProcessorUtil;
import de.plushnikov.intellij.plugin.util.PsiAnnotationSearchUtil;
import de.plushnikov.intellij.plugin.util.PsiAnnotationUtil;
import de.plushnikov.intellij.plugin.util.PsiClassUtil;
import de.plushnikov.intellij.plugin.util.PsiMethodUtil;
import lombok.Data;
import lombok.Getter;
import lombok.Value;
import org.jetbrains.annotations.NotNull;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
public class EqualsAndHashCodeToStringHandler {
private static final String TO_STRING_RANK_ANNOTATION_PARAMETER = "rank";
public static class MemberInfo implements Comparable<MemberInfo> {
private final PsiField psiField;
private final PsiMethod psiMethod;
private final String memberName;
private final boolean defaultInclude;
private final int rankValue;
MemberInfo(PsiField psiField) {
this(psiField, psiField.getName(), false);
}
MemberInfo(PsiField psiField, String memberName, int rankValue) {
this(psiField, memberName, false, rankValue);
}
MemberInfo(PsiField psiField, String memberName, boolean defaultInclude) {
this(psiField, memberName, defaultInclude, 0);
}
private MemberInfo(PsiField psiField, String memberName, boolean defaultInclude, int rankValue) {
this.psiField = psiField;
this.psiMethod = null;
this.memberName = memberName;
this.defaultInclude = defaultInclude;
this.rankValue = rankValue;
}
MemberInfo(PsiMethod psiMethod, String memberName, int rankValue) {
this.psiField = null;
this.psiMethod = psiMethod;
this.memberName = memberName;
this.defaultInclude = false;
this.rankValue = rankValue;
}
public PsiField getField() {
return psiField;
}
public PsiMethod getMethod() {
return psiMethod;
}
public String getName() {
return memberName;
}
public PsiType getType() {
if (null != psiField) {
return psiField.getType();
}
return psiMethod.getReturnType();
}
private boolean matchDefaultIncludedFieldName(String fieldName) {
if (null != psiField && defaultInclude) {
return fieldName.equals(psiField.getName());
}
return false;
}
@Override
public int compareTo(@NotNull MemberInfo other) {
return Integer.compare(other.rankValue, rankValue);
}
}
public Collection<MemberInfo> filterFields(@NotNull PsiClass psiClass, @NotNull PsiAnnotation psiAnnotation, boolean filterTransient, String includeAnnotationProperty) {
final boolean explicitOf = PsiAnnotationUtil.hasDeclaredProperty(psiAnnotation, "of");
final boolean onlyExplicitlyIncluded = PsiAnnotationUtil.getBooleanAnnotationValue(psiAnnotation, "onlyExplicitlyIncluded", false);
final String annotationFQN = psiAnnotation.getQualifiedName();
final String annotationIncludeFQN = annotationFQN + ".Include";
final String annotationExcludeFQN = annotationFQN + ".Exclude";
//Having both exclude and of generates a warning; the exclude parameter will be ignored in that case.
final Collection<String> ofProperty;
final Collection<String> excludeProperty;
if (!explicitOf) {
ofProperty = Collections.emptyList();
excludeProperty = makeSet(PsiAnnotationUtil.getAnnotationValues(psiAnnotation, "exclude", String.class));
} else {
ofProperty = makeSet(PsiAnnotationUtil.getAnnotationValues(psiAnnotation, "of", String.class));
excludeProperty = Collections.emptyList();
}
final Collection<PsiMember> psiMembers = PsiClassUtil.collectClassMemberIntern(psiClass);
final Collection<String> fieldNames2BeReplaced = new ArrayList<>();
final List<MemberInfo> result = new ArrayList<>(psiMembers.size());
for (PsiMember psiMember : psiMembers) {
final PsiAnnotation includeAnnotation = PsiAnnotationSearchUtil.findAnnotation(psiMember, annotationIncludeFQN);
if (null == includeAnnotation) {
if (onlyExplicitlyIncluded) {
continue;
}
if (!(psiMember instanceof PsiField)) {
continue;
}
final PsiField psiField = (PsiField) psiMember;
final String fieldName = psiField.getName();
if (null == fieldName) {
continue;
}
if (ofProperty.contains(fieldName)) {
result.add(new MemberInfo(psiField));
continue;
} else if (explicitOf) {
continue;
}
if (excludeProperty.contains(fieldName)) {
continue;
}
if (psiField.hasModifierProperty(PsiModifier.STATIC)) {
continue;
}
if ((filterTransient && psiField.hasModifierProperty(PsiModifier.TRANSIENT))) {
continue;
}
if (fieldName.startsWith(LombokUtils.LOMBOK_INTERN_FIELD_MARKER)) {
continue;
}
if (PsiAnnotationSearchUtil.isAnnotatedWith(psiField, annotationExcludeFQN)) {
continue;
}
result.add(new MemberInfo(psiField, fieldName, true));
} else {
final String includeNameValue = PsiAnnotationUtil.getStringAnnotationValue(includeAnnotation, includeAnnotationProperty);
final String newMemberName;
if (StringUtil.isEmptyOrSpaces(includeNameValue)) {
newMemberName = psiMember.getName();
} else {
newMemberName = includeNameValue;
}
if ((psiMember instanceof PsiMethod)) {
final PsiMethod psiMethod = (PsiMethod) psiMember;
if (0 == psiMethod.getParameterList().getParametersCount()) {
fieldNames2BeReplaced.add(newMemberName);
int memberRank = calcMemberRank(includeAnnotation);
result.add(new MemberInfo(psiMethod, psiMethod.getName(), memberRank));
}
} else {
int memberRank = calcMemberRank(includeAnnotation);
result.add(new MemberInfo((PsiField) psiMember, newMemberName, memberRank));
}
}
}
for (String fieldName : fieldNames2BeReplaced) {
// delete default-included fields with the same name as an explicit inclusion
result.removeIf(memberInfo -> memberInfo.matchDefaultIncludedFieldName(fieldName));
}
result.sort(MemberInfo::compareTo);
return result;
}
private int calcMemberRank(@NotNull PsiAnnotation includeAnnotation) {
final String includeRankValue = PsiAnnotationUtil.getStringAnnotationValue(includeAnnotation, TO_STRING_RANK_ANNOTATION_PARAMETER);
if (!StringUtil.isEmptyOrSpaces(includeRankValue)) {
try {
return Integer.parseInt(includeRankValue);
} catch (NumberFormatException ignore) {
}
}
return 0;
}
public String getMemberAccessorName(@NotNull MemberInfo memberInfo, boolean doNotUseGetters, @NotNull PsiClass psiClass) {
final String memberAccessor;
if (null == memberInfo.getMethod()) {
memberAccessor = buildAttributeNameString(doNotUseGetters, memberInfo.getField(), psiClass);
} else {
memberAccessor = memberInfo.getName() + "()";
}
return memberAccessor;
}
private String buildAttributeNameString(boolean doNotUseGetters, @NotNull PsiField classField, @NotNull PsiClass psiClass) {
final String fieldName = classField.getName();
if (doNotUseGetters) {
return fieldName;
} else {
final String getterName = LombokUtils.getGetterName(classField);
final boolean hasGetter;
if (PsiAnnotationSearchUtil.isAnnotatedWith(psiClass, Data.class, Value.class, lombok.experimental.Value.class, Getter.class)) {
final PsiAnnotation getterLombokAnnotation = PsiAnnotationSearchUtil.findAnnotation(psiClass, Getter.class);
hasGetter = null == getterLombokAnnotation || null != LombokProcessorUtil.getMethodModifier(getterLombokAnnotation);
} else {
hasGetter = PsiMethodUtil.hasMethodByName(PsiClassUtil.collectClassMethodsIntern(psiClass), getterName);
}
return hasGetter ? getterName + "()" : fieldName;
}
}
private Collection<String> makeSet(@NotNull Collection<String> exclude) {
if (exclude.isEmpty()) {
return Collections.emptySet();
} else {
return new HashSet<>(exclude);
}
}
}