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arouelarouel
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Add Sort Members functionality to Eclipse formatter
1 parent 13d24ae commit 749fa2a

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15 files changed

+977
-40
lines changed

15 files changed

+977
-40
lines changed

‎lib-extra/build.gradle‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -87,6 +87,7 @@ p2deps {
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into 'jdtCompileOnly', {
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p2repo 'https://download.eclipse.org/eclipse/updates/4.26/'
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install 'org.eclipse.jdt.core'
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install 'org.eclipse.jdt.core.manipulation'
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}
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}
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@@ -95,4 +96,3 @@ spotbugs {
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// LOW|MEDIUM|DEFAULT|HIGH (low = sensitive to even minor mistakes).
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reportLevel = com.github.spotbugs.snom.Confidence.valueOf('LOW')
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}
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‎lib-extra/src/jdt/java/com/diffplug/spotless/extra/glue/jdt/DefaultJavaElementComparator.java‎

Lines changed: 369 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,369 @@
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package com.diffplug.spotless.extra.glue.jdt;
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import java.util.Comparator;
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import java.util.List;
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import java.util.StringTokenizer;
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import org.eclipse.jdt.internal.corext.dom.ASTNodes;
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import org.eclipse.jdt.core.Flags;
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import org.eclipse.jdt.core.dom.ASTNode;
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import org.eclipse.jdt.core.dom.AbstractTypeDeclaration;
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import org.eclipse.jdt.core.dom.AnnotationTypeMemberDeclaration;
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import org.eclipse.jdt.core.dom.BodyDeclaration;
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import org.eclipse.jdt.core.dom.EnumConstantDeclaration;
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import org.eclipse.jdt.core.dom.FieldDeclaration;
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import org.eclipse.jdt.core.dom.MethodDeclaration;
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import org.eclipse.jdt.core.dom.Modifier;
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import org.eclipse.jdt.core.dom.SingleVariableDeclaration;
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import org.eclipse.jdt.core.dom.Type;
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import org.eclipse.jdt.core.dom.VariableDeclarationFragment;
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import org.eclipse.jdt.core.util.CompilationUnitSorter;
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class DefaultJavaElementComparator implements Comparator<BodyDeclaration> {
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static final int TYPE_INDEX = 0;
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static final int CONSTRUCTORS_INDEX = 1;
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static final int METHOD_INDEX = 2;
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static final int FIELDS_INDEX = 3;
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static final int INIT_INDEX = 4;
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static final int STATIC_FIELDS_INDEX = 5;
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static final int STATIC_INIT_INDEX = 6;
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static final int STATIC_METHODS_INDEX = 7;
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static final int ENUM_CONSTANTS_INDEX = 8;
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static final int N_CATEGORIES = 9;
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static final int PUBLIC_INDEX = 0;
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static final int PRIVATE_INDEX = 1;
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static final int PROTECTED_INDEX = 2;
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static final int DEFAULT_INDEX = 3;
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static final int N_VISIBILITIES = 4;
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private final boolean doNotSortFields;
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private final int[] memberCategoryOffsets;
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private final boolean sortByVisibility;
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private final int[] visibilityOffsets;
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static DefaultJavaElementComparator of(
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boolean doNotSortFields,
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String memberCategoryPreferences,
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boolean sortByVisibility,
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String visibilityPreferences) {
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int[] memberCategoryOffsets = new int[9];
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boolean success = fillMemberCategoryOffsets(memberCategoryPreferences, memberCategoryOffsets);
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if (!success) {
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String defaultValue = "T,SF,SI,SM,F,I,C,M";
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fillMemberCategoryOffsets(defaultValue, memberCategoryOffsets);
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}
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int[] visibilityOffsets = new int[4];
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boolean success2 = fillVisibilityOffsets(visibilityPreferences, visibilityOffsets);
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if (!success2) {
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String defaultValue = "B,V,R,D";
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fillVisibilityOffsets(defaultValue, visibilityOffsets);
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}
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return new DefaultJavaElementComparator(doNotSortFields, memberCategoryOffsets, sortByVisibility, visibilityOffsets);
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}
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DefaultJavaElementComparator(
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boolean doNotSortFields,
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int[] memberCategoryOffsets,
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boolean sortByVisibility,
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int[] visibilityOffsets) {
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this.doNotSortFields = doNotSortFields;
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this.memberCategoryOffsets = memberCategoryOffsets;
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this.sortByVisibility = sortByVisibility;
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this.visibilityOffsets = visibilityOffsets;
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}
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static boolean fillVisibilityOffsets(String preferencesString, int[] offsets) {
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StringTokenizer tokenizer = new StringTokenizer(preferencesString, ",");
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int i = 0;
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while (tokenizer.hasMoreTokens()) {
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String token = tokenizer.nextToken();
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if (token != null) {
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switch (token) {
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case "B":
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offsets[PUBLIC_INDEX] = i++;
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break;
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case "D":
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offsets[DEFAULT_INDEX] = i++;
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break;
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case "R":
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offsets[PROTECTED_INDEX] = i++;
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break;
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case "V":
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offsets[PRIVATE_INDEX] = i++;
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}
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}
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}
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return i == N_VISIBILITIES;
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}
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static boolean fillMemberCategoryOffsets(String preferencesString, int[] offsets) {
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StringTokenizer tokenizer = new StringTokenizer(preferencesString, ",");
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int i = 0;
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offsets[8] = i++;
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while (tokenizer.hasMoreTokens()) {
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String token = tokenizer.nextToken();
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if (token != null) {
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switch (token) {
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case "C":
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offsets[CONSTRUCTORS_INDEX] = i++;
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break;
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case "F":
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offsets[FIELDS_INDEX] = i++;
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break;
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case "I":
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offsets[INIT_INDEX] = i++;
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break;
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case "M":
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offsets[METHOD_INDEX] = i++;
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break;
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case "T":
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offsets[TYPE_INDEX] = i++;
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break;
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case "SF":
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offsets[STATIC_FIELDS_INDEX] = i++;
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break;
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case "SI":
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offsets[STATIC_INIT_INDEX] = i++;
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break;
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case "SM":
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offsets[STATIC_METHODS_INDEX] = i++;
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}
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}
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}
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return i == N_CATEGORIES;
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}
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private int category(BodyDeclaration bodyDeclaration) {
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switch (bodyDeclaration.getNodeType()) {
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case ASTNode.METHOD_DECLARATION: {
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MethodDeclaration method = (MethodDeclaration) bodyDeclaration;
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if (method.isConstructor()) {
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return CONSTRUCTORS_INDEX;
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}
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int flags = method.getModifiers();
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if (Modifier.isStatic(flags))
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return STATIC_METHODS_INDEX;
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else
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return METHOD_INDEX;
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}
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case ASTNode.FIELD_DECLARATION: {
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if (JdtFlags.isStatic(bodyDeclaration))
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return STATIC_FIELDS_INDEX;
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else
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return FIELDS_INDEX;
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}
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case ASTNode.INITIALIZER: {
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int flags = bodyDeclaration.getModifiers();
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if (Modifier.isStatic(flags))
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return STATIC_INIT_INDEX;
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else
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return INIT_INDEX;
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}
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case ASTNode.TYPE_DECLARATION:
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case ASTNode.ENUM_DECLARATION:
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case ASTNode.ANNOTATION_TYPE_DECLARATION:
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return TYPE_INDEX;
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case ASTNode.ENUM_CONSTANT_DECLARATION:
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return ENUM_CONSTANTS_INDEX;
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case ASTNode.ANNOTATION_TYPE_MEMBER_DECLARATION:
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return METHOD_INDEX; // reusing the method index
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}
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return 0; // should never happen
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}
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private int getCategoryIndex(int category) {
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return memberCategoryOffsets[category];
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}
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private int getVisibilityIndex(int modifierFlags) {
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int kind = 3;
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if (Flags.isPublic(modifierFlags)) {
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kind = 0;
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} else if (Flags.isProtected(modifierFlags)) {
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kind = 2;
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} else if (Flags.isPrivate(modifierFlags)) {
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kind = 1;
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}
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return this.visibilityOffsets[kind];
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}
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/**
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* This comparator follows the contract defined in CompilationUnitSorter.sort.
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*
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* @see Comparator#compare(java.lang.Object, java.lang.Object)
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* @see CompilationUnitSorter#sort(int, org.eclipse.jdt.core.ICompilationUnit, int[], java.util.Comparator, int, org.eclipse.core.runtime.IProgressMonitor)
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*/
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@Override
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public int compare(BodyDeclaration bodyDeclaration1, BodyDeclaration bodyDeclaration2) {
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boolean preserved1 = doNotSortFields && isSortPreserved(bodyDeclaration1);
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boolean preserved2 = doNotSortFields && isSortPreserved(bodyDeclaration2);
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// Bug 407759: need to use a common category for all isSortPreserved members that are to be sorted in the same group:
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int cat1 = category(bodyDeclaration1);
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if (preserved1) {
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cat1 = sortPreservedCategory(cat1);
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}
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int cat2 = category(bodyDeclaration2);
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if (preserved2) {
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cat2 = sortPreservedCategory(cat2);
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}
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if (cat1 != cat2) {
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return getCategoryIndex(cat1) - getCategoryIndex(cat2);
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}
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// cat1 == cat2 implies preserved1 == preserved2
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if (preserved1) {
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return preserveRelativeOrder(bodyDeclaration1, bodyDeclaration2);
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}
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if (sortByVisibility) {
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int flags1 = JdtFlags.getVisibilityCode(bodyDeclaration1);
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int flags2 = JdtFlags.getVisibilityCode(bodyDeclaration2);
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int vis = getVisibilityIndex(flags1) - getVisibilityIndex(flags2);
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if (vis != 0) {
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return vis;
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}
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}
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switch (bodyDeclaration1.getNodeType()) {
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case ASTNode.METHOD_DECLARATION: {
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MethodDeclaration method1 = (MethodDeclaration) bodyDeclaration1;
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MethodDeclaration method2 = (MethodDeclaration) bodyDeclaration2;
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if (sortByVisibility) {
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int vis = getVisibilityIndex(method1.getModifiers()) - getVisibilityIndex(method2.getModifiers());
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if (vis != 0) {
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return vis;
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}
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}
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String name1 = method1.getName().getIdentifier();
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String name2 = method2.getName().getIdentifier();
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// method declarations (constructors) are sorted by name
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int cmp = name1.compareTo(name2);
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if (cmp != 0) {
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return cmp;
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}
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// if names equal, sort by parameter types
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List<SingleVariableDeclaration> parameters1 = method1.parameters();
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List<SingleVariableDeclaration> parameters2 = method2.parameters();
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int length1 = parameters1.size();
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int length2 = parameters2.size();
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int len = Math.min(length1, length2);
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for (int i = 0; i < len; i++) {
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SingleVariableDeclaration param1 = parameters1.get(i);
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SingleVariableDeclaration param2 = parameters2.get(i);
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cmp = buildSignature(param1.getType()).compareTo(buildSignature(param2.getType()));
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if (cmp != 0) {
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return cmp;
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}
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}
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if (length1 != length2) {
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return length1 - length2;
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}
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return preserveRelativeOrder(bodyDeclaration1, bodyDeclaration2);
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}
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case ASTNode.FIELD_DECLARATION: {
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FieldDeclaration field1 = (FieldDeclaration) bodyDeclaration1;
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FieldDeclaration field2 = (FieldDeclaration) bodyDeclaration2;
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String name1 = ((VariableDeclarationFragment) field1.fragments().get(0)).getName().getIdentifier();
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String name2 = ((VariableDeclarationFragment) field2.fragments().get(0)).getName().getIdentifier();
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// field declarations are sorted by name
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return compareNames(bodyDeclaration1, bodyDeclaration2, name1, name2);
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}
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case ASTNode.INITIALIZER: {
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// preserve relative order
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return preserveRelativeOrder(bodyDeclaration1, bodyDeclaration2);
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}
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case ASTNode.TYPE_DECLARATION:
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case ASTNode.ENUM_DECLARATION:
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case ASTNode.ANNOTATION_TYPE_DECLARATION: {
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AbstractTypeDeclaration type1 = (AbstractTypeDeclaration) bodyDeclaration1;
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AbstractTypeDeclaration type2 = (AbstractTypeDeclaration) bodyDeclaration2;
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String name1 = type1.getName().getIdentifier();
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String name2 = type2.getName().getIdentifier();
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// typedeclarations are sorted by name
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return compareNames(bodyDeclaration1, bodyDeclaration2, name1, name2);
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}
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case ASTNode.ENUM_CONSTANT_DECLARATION: {
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EnumConstantDeclaration decl1 = (EnumConstantDeclaration) bodyDeclaration1;
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EnumConstantDeclaration decl2 = (EnumConstantDeclaration) bodyDeclaration2;
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String name1 = decl1.getName().getIdentifier();
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String name2 = decl2.getName().getIdentifier();
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// enum constants declarations are sorted by name
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return compareNames(bodyDeclaration1, bodyDeclaration2, name1, name2);
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}
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case ASTNode.ANNOTATION_TYPE_MEMBER_DECLARATION: {
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AnnotationTypeMemberDeclaration decl1 = (AnnotationTypeMemberDeclaration) bodyDeclaration1;
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AnnotationTypeMemberDeclaration decl2 = (AnnotationTypeMemberDeclaration) bodyDeclaration2;
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String name1 = decl1.getName().getIdentifier();
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String name2 = decl2.getName().getIdentifier();
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// enum constants declarations are sorted by name
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return compareNames(bodyDeclaration1, bodyDeclaration2, name1, name2);
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}
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}
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return 0;
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}
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private static int sortPreservedCategory(int category) {
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switch (category) {
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case STATIC_FIELDS_INDEX:
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case STATIC_INIT_INDEX:
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return STATIC_FIELDS_INDEX;
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case FIELDS_INDEX:
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case INIT_INDEX:
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return FIELDS_INDEX;
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default:
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return category;
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}
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}
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private boolean isSortPreserved(BodyDeclaration bodyDeclaration) {
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switch (bodyDeclaration.getNodeType()) {
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case ASTNode.FIELD_DECLARATION:
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case ASTNode.ENUM_CONSTANT_DECLARATION:
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case ASTNode.INITIALIZER:
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return true;
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default:
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return false;
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}
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}
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private int preserveRelativeOrder(BodyDeclaration bodyDeclaration1, BodyDeclaration bodyDeclaration2) {
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int value1 = ((Integer) bodyDeclaration1.getProperty(CompilationUnitSorter.RELATIVE_ORDER));
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int value2 = ((Integer) bodyDeclaration2.getProperty(CompilationUnitSorter.RELATIVE_ORDER));
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return value1 - value2;
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}
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private int compareNames(BodyDeclaration bodyDeclaration1, BodyDeclaration bodyDeclaration2, String name1, String name2) {
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int cmp = name1.compareTo(name2);
360+
if (cmp != 0) {
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return cmp;
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}
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return preserveRelativeOrder(bodyDeclaration1, bodyDeclaration2);
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}
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private String buildSignature(Type type) {
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return ASTNodes.asString(type);
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}
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}

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