TryStmt.java

/* 
  Copyright (C) 2013 Raquel Pau and Albert Coroleu.
 
 Walkmod is free software: you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 
 Walkmod is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public License
 along with Walkmod.  If not, see <http://www.gnu.org/licenses/>.*/
package org.walkmod.javalang.ast.stmt;

import java.util.LinkedList;
import java.util.List;

import org.walkmod.javalang.ast.Node;
import org.walkmod.javalang.ast.expr.VariableDeclarationExpr;
import org.walkmod.javalang.visitors.GenericVisitor;
import org.walkmod.javalang.visitors.VoidVisitor;

/**
 * @author Julio Vilmar Gesser
 */
public final class TryStmt extends Statement {

   private List<VariableDeclarationExpr> resources;

   private BlockStmt tryBlock;

   private List<CatchClause> catchs;

   private BlockStmt finallyBlock;

   public TryStmt() {
   }

   public TryStmt(final BlockStmt tryBlock, final List<CatchClause> catchs, final BlockStmt finallyBlock) {
      setTryBlock(tryBlock);
      setCatchs(catchs);
      setFinallyBlock(finallyBlock);
   }

   public TryStmt(final int beginLine, final int beginColumn, final int endLine, final int endColumn,
         List<VariableDeclarationExpr> resources, final BlockStmt tryBlock, final List<CatchClause> catchs,
         final BlockStmt finallyBlock) {
      super(beginLine, beginColumn, endLine, endColumn);
      setResources(resources);
      setTryBlock(tryBlock);
      setCatchs(catchs);
      setFinallyBlock(finallyBlock);
   }

   @Override
   public boolean removeChild(Node child) {
      boolean result = false;
      if (child != null) {
         if (tryBlock == child) {
            tryBlock = null;
            result = true;
         }
         if (!result) {
            if (finallyBlock == child) {
               finallyBlock = null;
               result = true;
            }
         }
         if (!result) {
            if (resources != null) {
               if (child instanceof VariableDeclarationExpr) {
                  List<VariableDeclarationExpr> resourcesAux = new LinkedList<VariableDeclarationExpr>(resources);
                  result = resourcesAux.remove(child);
                  resources = resourcesAux;
               }
            }
         }
         if (!result) {
            if (catchs != null) {
               if (child instanceof CatchClause) {
                  List<CatchClause> catchsAux = new LinkedList<CatchClause>(catchs);
                  result = catchsAux.remove(child);
                  catchs = catchsAux;
               }
            }
         }
      }
      if(result){
         updateReferences(child);
      }

      return result;
   }

   @Override
   public List<Node> getChildren() {
      List<Node> children = super.getChildren();
      if (resources != null) {
         children.addAll(resources);
      }
      if (tryBlock != null) {
         children.add(tryBlock);
      }
      if (catchs != null) {
         children.addAll(catchs);
      }
      if (finallyBlock != null) {
         children.add(finallyBlock);
      }
      return children;
   }

   @Override
   public <R, A> R accept(final GenericVisitor<R, A> v, final A arg) {
      if (!check()) {
         return null;
      }
      return v.visit(this, arg);
   }

   @Override
   public <A> void accept(final VoidVisitor<A> v, final A arg) {
      if (check()) {
         v.visit(this, arg);
      }
   }

   public List<CatchClause> getCatchs() {
      return catchs;
   }

   public BlockStmt getFinallyBlock() {
      return finallyBlock;
   }

   public BlockStmt getTryBlock() {
      return tryBlock;
   }

   public List<VariableDeclarationExpr> getResources() {
      return resources;
   }

   public void setCatchs(List<CatchClause> catchs) {
      this.catchs = catchs;
      setAsParentNodeOf(catchs);

   }

   public void setFinallyBlock(BlockStmt finallyBlock) {
      if (this.finallyBlock != null) {
         updateReferences(this.finallyBlock);
      }
      this.finallyBlock = finallyBlock;
      setAsParentNodeOf(finallyBlock);

   }

   public void setTryBlock(BlockStmt tryBlock) {
      if (this.tryBlock != null) {
         updateReferences(this.tryBlock);
      }
      this.tryBlock = tryBlock;
      setAsParentNodeOf(tryBlock);

   }

   public void setResources(List<VariableDeclarationExpr> resources) {
      this.resources = resources;
      setAsParentNodeOf(resources);
   }

   @Override
   public boolean replaceChildNode(Node oldChild, Node newChild) {
      boolean updated = false;
      if (oldChild == tryBlock) {
         setTryBlock((BlockStmt) newChild);
         updated = true;
      }
      if (!updated) {
         if (oldChild == finallyBlock) {
            setFinallyBlock((BlockStmt) newChild);
            updated = true;
         }
         if (!updated) {
            updated = replaceChildNodeInList(oldChild, newChild, catchs);

            if (!updated) {
               updated = replaceChildNodeInList(oldChild, newChild, resources);
            }
         }
      }

      return updated;
   }

   @Override
   public TryStmt clone() throws CloneNotSupportedException {
      return new TryStmt(clone(tryBlock), clone(catchs), clone(finallyBlock));
   }
}