content: /*
   * Copyright 2016 HuntBugs contributors
   * 
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * 
   *     http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package one.util.huntbugs.detect;
  
  import com.strobel.assembler.metadata.MethodReference;
  import com.strobel.decompiler.ast.AstCode;
  import com.strobel.decompiler.ast.Block;
  import com.strobel.decompiler.ast.Expression;
  
  import one.util.huntbugs.registry.MethodContext;
  import one.util.huntbugs.registry.anno.AstNodes;
  import one.util.huntbugs.registry.anno.AstVisitor;
  import one.util.huntbugs.registry.anno.WarningDefinition;
  import one.util.huntbugs.util.NodeChain;
  import one.util.huntbugs.util.Types;
  import one.util.huntbugs.warning.Roles;
  
  /**
   * @author Tagir Valeev
   *
   */
  @WarningDefinition(category="Correctness", name="DroppedException", maxScore=60)
  public class DroppedExceptionObject {
      @AstVisitor(nodes=AstNodes.EXPRESSIONS)
      public void visit(Expression expr, NodeChain nc, MethodContext mc) {
          if (expr.getCode() == AstCode.InitObject || expr.getCode() == AstCode.InvokeSpecial
              && expr.getArguments().get(0).getCode() == AstCode.__New) { // Probably procyon bug: invokespecial(__new) is not collapsed to InitObject 
              MethodReference mr = (MethodReference) expr.getOperand();
              if(Types.isInstance(mr.getDeclaringType(), "java/lang/Throwable") ||
                      Types.isInstance(mr.getDeclaringType(), "java/lang/Exception")) {
                  if(nc.getNode() instanceof Block) {
                      mc.report("DroppedException", 0, expr, Roles.EXCEPTION.create(mr.getDeclaringType()));
                  }
              }
          }
      }
  }
  