TryStatement added

src/org/jetbrains/jet/j2k/Converter.java

@@ -85,7 +85,7 @@ public class Converter {
   private static Function methodToFunction(PsiMethod method, boolean notEmpty) {
     final IdentifierImpl identifier = new IdentifierImpl(method.getName());
     final Type type = typeToType(method.getReturnType());
-    final Block body = bodyToBlock(method.getBody(), notEmpty);
+    final Block body = blockToBlock(method.getBody(), notEmpty);
     final Element params = elementToElement(method.getParameterList());
 
     if (method.isConstructor())
@@ -104,10 +104,10 @@ public class Converter {
   }
 
   @NotNull
-  private static Block bodyToBlock(PsiCodeBlock body, boolean notEmpty) {
+  public static Block blockToBlock(PsiCodeBlock block, boolean notEmpty) {
-    if (body == null)
+    if (block == null)
-      return new Block(new LinkedList<Statement>(), false);
+      return Block.EMPTY_BLOCK;
-    return new Block(statementsToStatementList(body.getStatements()), notEmpty);
+    return new Block(statementsToStatementList(block.getStatements()), notEmpty);
   }
 
   @NotNull
@@ -208,6 +208,7 @@ public class Converter {
     return result;
   }
 
+  @NotNull
   public static Parameter parameterToParameter(PsiParameter parameter) {
     return new Parameter(
       new IdentifierImpl(parameter.getName()), // TODO: remove

src/org/jetbrains/jet/j2k/ast/Block.java

@@ -3,15 +3,20 @@ package org.jetbrains.jet.j2k.ast;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.j2k.util.AstUtil;
 
+import java.util.LinkedList;
 import java.util.List;
 
 /**
  * @author ignatov
  */
 public class Block extends Statement {
-  private List<Statement> myStatements;
+  public final static Block EMPTY_BLOCK = new Block();
+  private List<Statement> myStatements = new LinkedList<Statement>();
   private boolean myNotEmpty = false;
 
+  private Block() {
+  }
+
   public Block(List<Statement> statements) {
     myStatements = statements;
   }
@@ -21,7 +26,7 @@ public class Block extends Statement {
     myNotEmpty = notEmpty;
   }
 
-  private boolean isEmpty() {
+  public boolean isEmpty() {
     return !myNotEmpty && myStatements.size() == 0;
   }
 

src/org/jetbrains/jet/j2k/ast/CatchStatement.java

@@ -0,0 +1,22 @@
+package org.jetbrains.jet.j2k.ast;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author ignatov
+ */
+public class CatchStatement extends Statement {
+  private final Parameter myVariable;
+  private final Block myBlock;
+
+  public CatchStatement(Parameter variable, Block block) {
+    myVariable = variable;
+    myBlock = block;
+  }
+
+  @NotNull
+  @Override
+  public String toKotlin() {
+    return "catch" + SPACE + "(" + myVariable.toKotlin() + ")" + SPACE + myBlock.toKotlin();
+  }
+}

src/org/jetbrains/jet/j2k/ast/TryStatement.java

@@ -0,0 +1,30 @@
+package org.jetbrains.jet.j2k.ast;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.j2k.util.AstUtil;
+
+import java.util.List;
+
+/**
+ * @author ignatov
+ */
+public class TryStatement extends Statement {
+  private final Block myBlock;
+  private final List<CatchStatement> myCatches;
+  private final Block myFinallyBlock;
+
+  public TryStatement(Block block, List<CatchStatement> catches, Block finallyBlock) {
+    myBlock = block;
+    myCatches = catches;
+    myFinallyBlock = finallyBlock;
+  }
+
+  @NotNull
+  @Override
+  public String toKotlin() {
+    return "try" + N +
+      myBlock.toKotlin() + N +
+      AstUtil.joinNodes(myCatches, N) + N +
+      (myFinallyBlock.isEmpty() ? EMPTY : "finally" + N + myFinallyBlock.toKotlin());
+  }
+}

src/org/jetbrains/jet/j2k/visitors/StatementVisitor.java

@@ -159,6 +159,20 @@ public class StatementVisitor extends ElementVisitor implements Visitor {
   @Override
   public void visitTryStatement(PsiTryStatement statement) {
     super.visitTryStatement(statement);
+
+    List<CatchStatement> catches = new LinkedList<CatchStatement>();
+    for (int i = 0; i < statement.getCatchBlocks().length; i++) {
+      catches.add(new CatchStatement(
+        parameterToParameter(statement.getCatchBlockParameters()[i]),
+        blockToBlock(statement.getCatchBlocks()[i], true)
+      ));
+    }
+
+    myResult = new TryStatement(
+      blockToBlock(statement.getTryBlock(), true),
+      catches,
+      blockToBlock(statement.getFinallyBlock(), true)
+    );
   }
 
   @Override

test/org/jetbrains/jet/j2k/ast/TryStatementTest.java

@@ -0,0 +1,111 @@
+package org.jetbrains.jet.j2k.ast;
+
+import junit.framework.Assert;
+import org.jetbrains.jet.j2k.JetTestCaseBase;
+
+/**
+ * @author ignatov
+ */
+public class TryStatementTest extends JetTestCaseBase {
+  public void testEmptyTryWithTwoCatchesWithoutFinally() throws Exception {
+    Assert.assertEquals(
+      statementToKotlin(
+        "try {" +
+          "} catch (Exception e) {" +
+          "    println(1);" +
+          "} catch (IOException e) {" +
+          "    println(0);" +
+          "}"),
+      "try\n" +
+        "{\n" +
+        "}\n" +
+        "catch (e : Exception?) {\n" +
+        "println(1)\n" +
+        "}\n" +
+        "catch (e : IOException?) {\n" +
+        "println(0)\n" +
+        "}"
+    );
+  }
+
+  public void testEmptyTryWithTwoCatchesWithEmptyFinally() throws Exception {
+    Assert.assertEquals(
+      statementToKotlin(
+        "try {" +
+          "} catch (Exception e) {" +
+          "    println(1);" +
+          "} catch (IOException e) {" +
+          "    println(0);" +
+          "} finally {}"),
+      "try\n" +
+        "{\n" +
+        "}\n" +
+        "catch (e : Exception?) {\n" +
+        "println(1)\n" +
+        "}\n" +
+        "catch (e : IOException?) {\n" +
+        "println(0)\n" +
+        "}\n" +
+        "finally\n" +
+        "{\n" +
+        "}"
+    );
+  }
+
+  public void testEmptyTryWithTwoCatchesWithFinally() throws Exception {
+    Assert.assertEquals(
+      statementToKotlin(
+        "try {" +
+          "} catch (Exception e) {" +
+          "    println(1);" +
+          "} catch (IOException e) {" +
+          "    println(0);" +
+          "} finally {" +
+          "    println(3);" +
+          "}"),
+      "try\n" +
+        "{\n" +
+        "}\n" +
+        "catch (e : Exception?) {\n" +
+        "println(1)\n" +
+        "}\n" +
+        "catch (e : IOException?) {\n" +
+        "println(0)\n" +
+        "}\n" +
+        "finally\n" +
+        "{\n" +
+        "println(3)\n" +
+        "}"
+    );
+  }
+
+  public void testCommonCaseForTryStatement() throws Exception {
+    Assert.assertEquals(
+      statementToKotlin(
+        "try {" +
+          "    callMethod(params);" +
+          "} catch (Exception e) {" +
+          "    println(1);" +
+          "} catch (IOException e) {" +
+          "    println(0);" +
+          "} finally {" +
+          "    println(3);" +
+          "}"),
+      "try\n" +
+        "{\n" +
+        "callMethod(params)\n" +
+        "}\n" +
+        "catch (e : Exception?) {\n" +
+        "println(1)\n" +
+        "}\n" +
+        "catch (e : IOException?) {\n" +
+        "println(0)\n" +
+        "}\n" +
+        "finally\n" +
+        "{\n" +
+        "println(3)\n" +
+        "}"
+    );
+  }
+
+}