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+/*
+ * Copyright © 2009 Reinier Zwitserloot and Roel Spilker.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package lombok.eclipse.handlers;
+
+import static lombok.eclipse.handlers.PKG.*;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import lombok.AccessLevel;
+import lombok.ToString;
+import lombok.core.AnnotationValues;
+import lombok.core.AST.Kind;
+import lombok.eclipse.Eclipse;
+import lombok.eclipse.EclipseAnnotationHandler;
+import lombok.eclipse.EclipseAST.Node;
+
+import org.eclipse.jdt.internal.compiler.ast.ASTNode;
+import org.eclipse.jdt.internal.compiler.ast.Annotation;
+import org.eclipse.jdt.internal.compiler.ast.BinaryExpression;
+import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
+import org.eclipse.jdt.internal.compiler.ast.Expression;
+import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
+import org.eclipse.jdt.internal.compiler.ast.MarkerAnnotation;
+import org.eclipse.jdt.internal.compiler.ast.MessageSend;
+import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
+import org.eclipse.jdt.internal.compiler.ast.NameReference;
+import org.eclipse.jdt.internal.compiler.ast.OperatorIds;
+import org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference;
+import org.eclipse.jdt.internal.compiler.ast.QualifiedTypeReference;
+import org.eclipse.jdt.internal.compiler.ast.ReturnStatement;
+import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
+import org.eclipse.jdt.internal.compiler.ast.Statement;
+import org.eclipse.jdt.internal.compiler.ast.StringLiteral;
+import org.eclipse.jdt.internal.compiler.ast.SuperReference;
+import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
+import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
+import org.eclipse.jdt.internal.compiler.lookup.TypeConstants;
+import org.mangosdk.spi.ProviderFor;
+
+/**
+ * Handles the <code>ToString</code> annotation for eclipse.
+ */
+@ProviderFor(EclipseAnnotationHandler.class)
+public class HandleToString implements EclipseAnnotationHandler<ToString> {
+ private void checkForBogusExcludes(Node type, AnnotationValues<ToString> annotation) {
+ List<String> list = Arrays.asList(annotation.getInstance().exclude());
+ boolean[] matched = new boolean[list.size()];
+
+ for ( Node child : type.down() ) {
+ if ( list.isEmpty() ) break;
+ if ( child.getKind() != Kind.FIELD ) continue;
+ if ( (((FieldDeclaration)child.get()).modifiers & ClassFileConstants.AccStatic) != 0 ) continue;
+ int idx = list.indexOf(child.getName());
+ if ( idx > -1 ) matched[idx] = true;
+ }
+
+ for ( int i = 0 ; i < list.size() ; i++ ) {
+ if ( !matched[i] ) {
+ annotation.setWarning("exclude", "This field does not exist, or would have been excluded anyway.", i);
+ }
+ }
+ }
+
+ public void generateToStringForType(Node typeNode, Node errorNode) {
+ for ( Node child : typeNode.down() ) {
+ if ( child.getKind() == Kind.ANNOTATION ) {
+ if ( Eclipse.annotationTypeMatches(ToString.class, child) ) {
+ //The annotation will make it happen, so we can skip it.
+ return;
+ }
+ }
+ }
+
+ boolean includeFieldNames = false;
+ boolean callSuper = false;
+ try {
+ includeFieldNames = ((Boolean)ToString.class.getMethod("includeFieldNames").getDefaultValue()).booleanValue();
+ } catch ( Exception ignore ) {}
+ try {
+ callSuper = ((Boolean)ToString.class.getMethod("callSuper").getDefaultValue()).booleanValue();
+ } catch ( Exception ignore ) {}
+ generateToString(typeNode, errorNode, Collections.<String>emptyList(),includeFieldNames, callSuper, false);
+ }
+
+ public boolean handle(AnnotationValues<ToString> annotation, Annotation ast, Node annotationNode) {
+ ToString ann = annotation.getInstance();
+ List<String> excludes = Arrays.asList(ann.exclude());
+ Node typeNode = annotationNode.up();
+
+ checkForBogusExcludes(typeNode, annotation);
+
+ return generateToString(typeNode, annotationNode, excludes, ann.includeFieldNames(), ann.callSuper(), true);
+ }
+
+ public boolean generateToString(Node typeNode, Node errorNode, List<String> excludes,
+ boolean includeFieldNames, boolean callSuper, boolean whineIfExists) {
+ TypeDeclaration typeDecl = null;
+
+ if ( typeNode.get() instanceof TypeDeclaration ) typeDecl = (TypeDeclaration) typeNode.get();
+ int modifiers = typeDecl == null ? 0 : typeDecl.modifiers;
+ boolean notAClass = (modifiers &
+ (ClassFileConstants.AccInterface | ClassFileConstants.AccAnnotation | ClassFileConstants.AccEnum)) != 0;
+
+ if ( typeDecl == null || notAClass ) {
+ errorNode.addError("@ToString is only supported on a class.");
+ return false;
+ }
+
+ List<Node> nodesForToString = new ArrayList<Node>();
+ for ( Node child : typeNode.down() ) {
+ if ( child.getKind() != Kind.FIELD ) continue;
+ FieldDeclaration fieldDecl = (FieldDeclaration) child.get();
+ //Skip static fields.
+ if ( (fieldDecl.modifiers & ClassFileConstants.AccStatic) != 0 ) continue;
+ //Skip excluded fields
+ if ( excludes.contains(new String(fieldDecl.name)) ) continue;
+ nodesForToString.add(child);
+ }
+
+ switch ( methodExists("toString", typeNode) ) {
+ case NOT_EXISTS:
+ MethodDeclaration toString = createToString(typeNode, nodesForToString, includeFieldNames, callSuper, errorNode.get());
+ injectMethod(typeNode, toString);
+ return true;
+ case EXISTS_BY_LOMBOK:
+ return true;
+ default:
+ case EXISTS_BY_USER:
+ if ( whineIfExists ) {
+ errorNode.addWarning("Not generating toString(): A method with that name already exists");
+ }
+ return true;
+ }
+ }
+
+ private MethodDeclaration createToString(Node type, Collection<Node> fields, boolean includeFieldNames, boolean callSuper, ASTNode pos) {
+ char[] rawTypeName = ((TypeDeclaration)type.get()).name;
+ String typeName = rawTypeName == null ? "" : new String(rawTypeName);
+ char[] prefix = (typeName + "(").toCharArray();
+ char[] suffix = ")".toCharArray();
+ char[] infix = ", ".toCharArray();
+ long p = (long)pos.sourceStart << 32 | pos.sourceEnd;
+ final int PLUS = OperatorIds.PLUS;
+
+ boolean first = true;
+ Expression current = new StringLiteral(prefix, 0, 0, 0);
+ if ( callSuper ) {
+ MessageSend callToSuper = new MessageSend();
+ callToSuper.receiver = new SuperReference(0, 0);
+ callToSuper.selector = "toString".toCharArray();
+ current = new BinaryExpression(current, new StringLiteral("super=[".toCharArray(), 0, 0, 0), PLUS);
+ current = new BinaryExpression(current, callToSuper, PLUS);
+ current = new BinaryExpression(current, new StringLiteral(new char[] { ']' }, 0, 0, 0), PLUS);
+ first = false;
+ }
+
+ for ( Node field : fields ) {
+ FieldDeclaration f = (FieldDeclaration)field.get();
+ if ( f.name == null || f.type == null ) continue;
+ if ( !first ) {
+ current = new BinaryExpression(current, new StringLiteral(infix, 0, 0, 0), PLUS);
+ }
+ else first = false;
+
+ Expression ex;
+ if ( f.type.dimensions() > 0 ) {
+ MessageSend arrayToString = new MessageSend();
+ arrayToString.receiver = generateQualifiedNameRef(TypeConstants.JAVA, TypeConstants.UTIL, "Arrays".toCharArray());
+ arrayToString.arguments = new Expression[] { new SingleNameReference(f.name, p) };
+ if ( f.type.dimensions() > 1 || !BUILT_IN_TYPES.contains(new String(f.type.getLastToken())) ) {
+ arrayToString.selector = "deepToString".toCharArray();
+ } else {
+ arrayToString.selector = "toString".toCharArray();
+ }
+ ex = arrayToString;
+ } else ex = new SingleNameReference(f.name, p);
+
+ if ( includeFieldNames ) {
+ char[] namePlusEqualsSign = (new String(f.name) + "=").toCharArray();
+ current = new BinaryExpression(current, new StringLiteral(namePlusEqualsSign, 0, 0, 0), PLUS);
+ }
+ current = new BinaryExpression(current, ex, PLUS);
+ }
+ current = new BinaryExpression(current, new StringLiteral(suffix, 0, 0, 0), PLUS);
+
+ ReturnStatement returnStatement = new ReturnStatement(current, (int)(p >> 32), (int)p);
+
+ MethodDeclaration method = new MethodDeclaration(((CompilationUnitDeclaration) type.top().get()).compilationResult);
+ method.modifiers = PKG.toModifier(AccessLevel.PUBLIC);
+ method.returnType = new QualifiedTypeReference(TypeConstants.JAVA_LANG_STRING, new long[] {0, 0, 0});
+ method.annotations = new Annotation[] {
+ new MarkerAnnotation(new QualifiedTypeReference(TypeConstants.JAVA_LANG_OVERRIDE, new long[] { 0, 0, 0}), 0)
+ };
+ method.arguments = null;
+ method.selector = "toString".toCharArray();
+ method.thrownExceptions = null;
+ method.typeParameters = null;
+ method.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
+ method.bodyStart = method.declarationSourceStart = method.sourceStart = pos.sourceStart;
+ method.bodyEnd = method.declarationSourceEnd = method.sourceEnd = pos.sourceEnd;
+ method.statements = new Statement[] { returnStatement };
+ return method;
+ }
+
+ private static final Set<String> BUILT_IN_TYPES = Collections.unmodifiableSet(new HashSet<String>(Arrays.asList(
+ "byte", "short", "int", "long", "char", "boolean", "double", "float")));
+
+ private NameReference generateQualifiedNameRef(char[]... varNames) {
+ if ( varNames.length > 1 )
+ return new QualifiedNameReference(varNames, new long[varNames.length], 0, 0);
+ else return new SingleNameReference(varNames[0], 0);
+ }
+}