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/*******************************************************************************
* Copyright (c) 2019 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* This is an implementation of an early-draft specification developed under the Java
* Community Process (JCP) and is made available for testing and evaluation purposes
* only. The code is not compatible with any specification of the JCP.
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.core.tests.rewrite.describing;
import java.util.List;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.dom.AST;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.Block;
import org.eclipse.jdt.core.dom.BreakStatement;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jdt.core.dom.MethodDeclaration;
import org.eclipse.jdt.core.dom.SimpleName;
import org.eclipse.jdt.core.dom.Statement;
import org.eclipse.jdt.core.dom.SwitchCase;
import org.eclipse.jdt.core.dom.SwitchExpression;
import org.eclipse.jdt.core.dom.SwitchStatement;
import org.eclipse.jdt.core.dom.TypeDeclaration;
import org.eclipse.jdt.core.dom.VariableDeclarationFragment;
import org.eclipse.jdt.core.dom.VariableDeclarationStatement;
import org.eclipse.jdt.core.dom.rewrite.ASTRewrite;
import org.eclipse.jdt.core.dom.rewrite.ListRewrite;
import junit.framework.Test;
public class ASTRewritingSwitchExpressionsTest extends ASTRewritingTest {
public ASTRewritingSwitchExpressionsTest(String name) {
super(name, 12);
}
public ASTRewritingSwitchExpressionsTest(String name, int apiLevel) {
super(name, apiLevel);
}
public static Test suite() {
return createSuite(ASTRewritingSwitchExpressionsTest.class);
}
@SuppressWarnings("rawtypes")
public void testSwitchExpressions_since_12() throws Exception {
IPackageFragment pack1= this.sourceFolder.createPackageFragment("test1", false, null);
StringBuffer buf= new StringBuffer();
buf.append("package test1;\n");
buf.append("public class E {\n");
buf.append(" public void foo(int i) {\n");
buf.append(" switch (i) {\n");
buf.append(" }\n");
buf.append(" switch (i) {\n");
buf.append(" case 1, 2->\n");
buf.append(" i= 1;\n");
buf.append(" case 3->\n");
buf.append(" i= 3;\n");
buf.append(" default->\n");
buf.append(" i= 4;\n");
buf.append(" }\n");
buf.append(" }\n");
buf.append("}\n");
ICompilationUnit cu= pack1.createCompilationUnit("E.java", buf.toString(), false, null);
CompilationUnit astRoot= createAST(cu);
ASTRewrite rewrite= ASTRewrite.create(astRoot.getAST());
AST ast= astRoot.getAST();
assertTrue("Parse errors", (astRoot.getFlags() & ASTNode.MALFORMED) == 0);
TypeDeclaration type= findTypeDeclaration(astRoot, "E");
MethodDeclaration methodDecl= findMethodDeclaration(type, "foo");
Block block= methodDecl.getBody();
List blockStatements= block.statements();
assertTrue("Number of statements not 2", blockStatements.size() == 2);
{ // insert statements, replace expression
SwitchStatement switchStatement= (SwitchStatement) blockStatements.get(0);
ASTNode expression= switchStatement.getExpression();
SimpleName newExpression= ast.newSimpleName("x");
rewrite.replace(expression, newExpression, null);
List statements= switchStatement.statements();
assertTrue("Number of statements not 0", statements.size() == 0);
SwitchCase caseStatement1= ast.newSwitchCase();
caseStatement1.setSwitchLabeledRule(true);
caseStatement1.expressions().add(ast.newNumberLiteral("1"));
caseStatement1.expressions().add(ast.newNumberLiteral("2"));
Statement statement1= ast.newReturnStatement();
SwitchCase caseStatement2= ast.newSwitchCase(); // default
caseStatement2.setSwitchLabeledRule(true);
ListRewrite listRewrite= rewrite.getListRewrite(switchStatement, SwitchStatement.STATEMENTS_PROPERTY);
listRewrite.insertLast(caseStatement1, null);
listRewrite.insertLast(statement1, null);
listRewrite.insertLast(caseStatement2, null);
}
{ // insert, remove, replace statements, change case statements
SwitchStatement switchStatement= (SwitchStatement) blockStatements.get(1);
List statements= switchStatement.statements();
assertTrue("Number of statements not 6", statements.size() == 6);
// remove statements
rewrite.remove((ASTNode) statements.get(0), null);
rewrite.remove((ASTNode) statements.get(1), null);
// change case statement
SwitchCase caseStatement= (SwitchCase) statements.get(2);
ListRewrite listRewrite= rewrite.getListRewrite(caseStatement, SwitchCase.EXPRESSIONS2_PROPERTY);
{
listRewrite.insertFirst(ast.newNumberLiteral("10"), null);
listRewrite.insertLast(ast.newNumberLiteral("12"), null);
}
}
String preview= evaluateRewrite(cu, rewrite);
buf= new StringBuffer();
buf.append("package test1;\n");
buf.append("public class E {\n");
buf.append(" public void foo(int i) {\n");
buf.append(" switch (x) {\n");
buf.append(" case 1, 2->\n");
buf.append(" return;\n");
buf.append(" default->\n");
buf.append(" }\n");
buf.append(" switch (i) {\n");
buf.append(" case 10, 3, 12->\n");
buf.append(" i= 3;\n");
buf.append(" default->\n");
buf.append(" i= 4;\n");
buf.append(" }\n");
buf.append(" }\n");
buf.append("}\n");
assertEqualString(preview, buf.toString());
}
@SuppressWarnings("rawtypes")
public void testSwitchExpressions_02_since_12() throws Exception {
IPackageFragment pack1= this.sourceFolder.createPackageFragment("test1", false, null);
StringBuffer buf= new StringBuffer();
buf.append("package test1;\n");
buf.append("public class E {\n");
buf.append(" public void foo(int i) {\n");
buf.append(" switch (i) {\n");
buf.append(" case 1, 2->\n");
buf.append(" i= 1;\n");
buf.append(" case 3->\n");
buf.append(" i= 3;\n");
buf.append(" default->\n");
buf.append(" i= 4;\n");
buf.append(" }\n");
buf.append(" }\n");
buf.append("}\n");
ICompilationUnit cu= pack1.createCompilationUnit("E.java", buf.toString(), false, null);
CompilationUnit astRoot= createAST(cu);
ASTRewrite rewrite= ASTRewrite.create(astRoot.getAST());
AST ast= astRoot.getAST();
assertTrue("Parse errors", (astRoot.getFlags() & ASTNode.MALFORMED) == 0);
TypeDeclaration type= findTypeDeclaration(astRoot, "E");
MethodDeclaration methodDecl= findMethodDeclaration(type, "foo");
Block block= methodDecl.getBody();
List blockStatements= block.statements();
{ // insert statements, replace expression
SwitchStatement switchStatement= (SwitchStatement) blockStatements.get(0);
SwitchCase caseStatement1= ast.newSwitchCase();
caseStatement1.setSwitchLabeledRule(true);
caseStatement1.expressions().add(ast.newNumberLiteral("1024"));
BreakStatement breakStatement = ast.newBreakStatement();
breakStatement.setExpression(ast.newNumberLiteral("2048"));
ListRewrite listRewrite= rewrite.getListRewrite(switchStatement, SwitchStatement.STATEMENTS_PROPERTY);
SwitchCase defaultCase = (SwitchCase) switchStatement.statements().get(4);
listRewrite.insertBefore(caseStatement1, defaultCase, null);
listRewrite.insertBefore(breakStatement, defaultCase, null);
}
String preview= evaluateRewrite(cu, rewrite);
buf= new StringBuffer();
buf.append("package test1;\n");
buf.append("public class E {\n");
buf.append(" public void foo(int i) {\n");
buf.append(" switch (i) {\n");
buf.append(" case 1, 2->\n");
buf.append(" i= 1;\n");
buf.append(" case 3->\n");
buf.append(" i= 3;\n");
buf.append(" case 1024->\n");
buf.append(" break 2048;\n");
buf.append(" default->\n");
buf.append(" i= 4;\n");
buf.append(" }\n");
buf.append(" }\n");
buf.append("}\n");
assertEqualString(preview, buf.toString());
}
@SuppressWarnings("rawtypes")
public void testSwitchExpressions_03_since_12() throws Exception {
IPackageFragment pack1= this.sourceFolder.createPackageFragment("test1", false, null);
String s =
"package test1;\n"+
"public class X {\n"+
" static int foo(int i) {\n"+
" int tw = \n"+
" switch (i) {\n"+
" case 1 -> {\n"+
" int z = 100;\n"+
" break z;\n"+
" }\n"+
" default -> {\n"+
" break 12;\n"+
" }\n"+
" };\n"+
" return tw;\n"+
" }\n"+
" public static void main(String[] args) {\n"+
" System.out.print(foo(1));\n"+
" }\n"+
"}\n";
StringBuffer buf = new StringBuffer(s);
ICompilationUnit cu= pack1.createCompilationUnit("X.java", buf.toString(), false, null);
CompilationUnit astRoot= createAST(cu);
ASTRewrite rewrite= ASTRewrite.create(astRoot.getAST());
AST ast= astRoot.getAST();
assertTrue("Parse errors", (astRoot.getFlags() & ASTNode.MALFORMED) == 0);
TypeDeclaration type= findTypeDeclaration(astRoot, "X");
MethodDeclaration methodDecl= findMethodDeclaration(type, "foo");
Block block= methodDecl.getBody();
List blockStatements= block.statements();
{ // insert statements, replace expression
VariableDeclarationStatement stmt = (VariableDeclarationStatement) blockStatements.get(0);
SwitchExpression switchExpression= (SwitchExpression) ((VariableDeclarationFragment) stmt.fragments().get(0)).getInitializer();
SwitchCase caseStatement1= ast.newSwitchCase();
caseStatement1.setSwitchLabeledRule(true);
caseStatement1.expressions().add(ast.newNumberLiteral("100"));
caseStatement1.expressions().add(ast.newNumberLiteral("200"));
SwitchCase caseStatement2= ast.newSwitchCase(); // default
caseStatement2.setSwitchLabeledRule(true);
BreakStatement breakStatement = ast.newBreakStatement();
breakStatement.setExpression(ast.newNumberLiteral("2048"));
Block block1 = ast.newBlock();
block1.statements().add(breakStatement);
SwitchCase defaultCase = (SwitchCase) switchExpression.statements().get(2);
ListRewrite listRewrite= rewrite.getListRewrite(switchExpression, SwitchExpression.STATEMENTS_PROPERTY);
listRewrite.insertBefore(caseStatement1, defaultCase, null);
listRewrite.insertBefore(block1, defaultCase, null);
}
String preview= evaluateRewrite(cu, rewrite);
buf= new StringBuffer();
buf.append("package test1;\n");
buf.append("public class X {\n");
buf.append(" static int foo(int i) {\n");
buf.append(" int tw = \n");
buf.append(" switch (i) {\n");
buf.append(" case 1 -> {\n");
buf.append(" int z = 100;\n");
buf.append(" break z;\n");
buf.append(" }\n");
buf.append(" case 100, 200->\n");
buf.append(" {\n");
buf.append(" break 2048;\n");
buf.append(" }\n");
buf.append(" default -> {\n");
buf.append(" break 12;\n");
buf.append(" }\n");
buf.append(" };\n");
buf.append(" return tw;\n");
buf.append(" }\n");
buf.append(" public static void main(String[] args) {\n");
buf.append(" System.out.print(foo(1));\n");
buf.append(" }\n");
buf.append("}\n");
assertEqualString(preview, buf.toString());
}
@SuppressWarnings("rawtypes")
public void testSwitchStatement_Bug543720_since_12() throws Exception {
IPackageFragment pack1= this.sourceFolder.createPackageFragment("test1", false, null);
String s =
"package test1;\n"+
"public class X {\n"+
" static int foo(int i) {\n"+
" int tw = 0;\n"+
" switch (i) {\n"+
" case 1 : {\n"+
" int z = 100;\n"+
" break;\n"+
" }\n"+
" default : {\n"+
" break;\n"+
" }\n"+
" }\n"+
" return tw;\n"+
" }\n"+
" public static void main(String[] args) {\n"+
" System.out.print(foo(1));\n"+
" }\n"+
"}\n";
StringBuffer buf = new StringBuffer(s);
ICompilationUnit cu= pack1.createCompilationUnit("X.java", buf.toString(), false, null);
CompilationUnit astRoot= createAST(cu);
ASTRewrite rewrite= ASTRewrite.create(astRoot.getAST());
AST ast= astRoot.getAST();
assertTrue("Parse errors", (astRoot.getFlags() & ASTNode.MALFORMED) == 0);
TypeDeclaration type= findTypeDeclaration(astRoot, "X");
MethodDeclaration methodDecl= findMethodDeclaration(type, "foo");
Block block= methodDecl.getBody();
List blockStatements= block.statements();
{ // insert statements, replace expression
SwitchStatement switchStmt = (SwitchStatement) blockStatements.get(1);
SwitchCase caseStatement1= ast.newSwitchCase();
caseStatement1.expressions().add(ast.newNumberLiteral("100"));
BreakStatement breakStatement = ast.newBreakStatement();
Block block1 = ast.newBlock();
block1.statements().add(breakStatement);
SwitchCase defaultCase = (SwitchCase) switchStmt.statements().get(2);
ListRewrite listRewrite= rewrite.getListRewrite(switchStmt, SwitchStatement.STATEMENTS_PROPERTY);
listRewrite.insertBefore(caseStatement1, defaultCase, null);
listRewrite.insertBefore(block1, defaultCase, null);
}
String preview= evaluateRewrite(cu, rewrite);
buf= new StringBuffer();
buf.append("package test1;\n");
buf.append("public class X {\n");
buf.append(" static int foo(int i) {\n");
buf.append(" int tw = 0;\n");
buf.append(" switch (i) {\n");
buf.append(" case 1 : {\n");
buf.append(" int z = 100;\n");
buf.append(" break;\n");
buf.append(" }\n");
buf.append(" case 100:\n");
buf.append(" {\n");
buf.append(" break;\n");
buf.append(" }\n");
buf.append(" default : {\n");
buf.append(" break;\n");
buf.append(" }\n");
buf.append(" }\n");
buf.append(" return tw;\n");
buf.append(" }\n");
buf.append(" public static void main(String[] args) {\n");
buf.append(" System.out.print(foo(1));\n");
buf.append(" }\n");
buf.append("}\n");
assertEqualString(preview, buf.toString());
}
@SuppressWarnings("rawtypes")
public void testSwitchExpressions_04_since_12() throws Exception {
IPackageFragment pack1= this.sourceFolder.createPackageFragment("test1", false, null);
String s = "package test1;\n"+
"public class X {\n"+
" static int foo(int i) {\n"+
" int tw =\n"+
" switch (i) {\n"+
" case 1 -> \n"+
" {\n"+
" int z = 100;\n"+
" break z;\n"+
" }\n"+
" default -> {\n"+
" break 12;\n"+
" }\n"+
" };\n"+
" return tw;\n"+
" }\n"+
" public static void main(String[] args) {\n"+
" System.out.print(foo(1));\n"+
" }\n"+
"}\n";
StringBuffer buf = new StringBuffer(s);
ICompilationUnit cu= pack1.createCompilationUnit("X.java", buf.toString(), false, null);
CompilationUnit astRoot= createAST(cu);
ASTRewrite rewrite= ASTRewrite.create(astRoot.getAST());
AST ast= astRoot.getAST();
assertTrue("Parse errors", (astRoot.getFlags() & ASTNode.MALFORMED) == 0);
TypeDeclaration type= findTypeDeclaration(astRoot, "X");
MethodDeclaration methodDecl= findMethodDeclaration(type, "foo");
Block block= methodDecl.getBody();
List blockStatements= block.statements();
{ // insert statements, replace expression
VariableDeclarationStatement stmt = (VariableDeclarationStatement) blockStatements.get(0);
SwitchExpression switchExpression= (SwitchExpression) ((VariableDeclarationFragment) stmt.fragments().get(0)).getInitializer();
ASTNode expression= switchExpression.getExpression();
SimpleName newExpression= ast.newSimpleName("x");
rewrite.replace(expression, newExpression, null);
List statements= switchExpression.statements();
// remove statements
rewrite.remove((ASTNode) statements.get(0), null);
rewrite.remove((ASTNode) statements.get(1), null);
}
String preview= evaluateRewrite(cu, rewrite);
buf= new StringBuffer();
buf.append("package test1;\n");
buf.append("public class X {\n");
buf.append(" static int foo(int i) {\n");
buf.append(" int tw =\n");
buf.append(" switch (x) {\n");
buf.append(" default -> {\n");
buf.append(" break 12;\n");
buf.append(" }\n");
buf.append(" };\n");
buf.append(" return tw;\n");
buf.append(" }\n");
buf.append(" public static void main(String[] args) {\n");
buf.append(" System.out.print(foo(1));\n");
buf.append(" }\n");
buf.append("}\n");
assertEqualString(preview, buf.toString());
}
//Note: complete removal of statements under switch statements now added in ASTRSTest and hence not repeated here.
}
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