BlockStmt.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.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.walkmod.javalang.ast.Node;
import org.walkmod.javalang.ast.ScopeAware;
import org.walkmod.javalang.ast.SymbolDefinition;
import org.walkmod.javalang.ast.body.VariableDeclarator;
import org.walkmod.javalang.ast.expr.Expression;
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 BlockStmt extends Statement implements ScopeAware{

   private List<Statement> stmts;

   public BlockStmt() {
   }

   public BlockStmt(List<Statement> stmts) {
      setStmts(stmts);
   }

   public BlockStmt(int beginLine, int beginColumn, int endLine, int endColumn, List<Statement> stmts) {
      super(beginLine, beginColumn, endLine, endColumn);
      setStmts(stmts);
   }

   @Override
   public boolean removeChild(Node child) {
      boolean result = false;
      if (child != null) {
         if (stmts != null) {
            if (child instanceof Statement) {
               List<Statement> stmtsAux = new LinkedList<Statement>(stmts);
               result = stmtsAux.remove(child);
               stmts = stmtsAux;
            }
         }
      }
      if(result){
         updateReferences(child);
      }
      return result;
   }

   @Override
   public List<Node> getChildren() {
      List<Node> children = new LinkedList<Node>();
      if (stmts != null) {
         children.addAll(stmts);
      }
      return children;
   }

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

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

   public List<Statement> getStmts() {
      return stmts;
   }

   public void setStmts(List<Statement> stmts) {
      this.stmts = stmts;
      setAsParentNodeOf(stmts);
   }

   @Override
   public boolean replaceChildNode(Node oldChild, Node newChild) {
      return replaceChildNodeInList(oldChild, newChild, stmts);
   }

   @Override
   public BlockStmt clone() throws CloneNotSupportedException {
      return new BlockStmt(clone(stmts));
   }

   @Override
   public Map<String, SymbolDefinition> getVariableDefinitions(){
      Node parent = getParentNode();
      Map<String, SymbolDefinition> result = null;
      while (parent != null && parent instanceof ScopeAware) {
         parent = parent.getParentNode();
      }
      if (parent != null && (parent instanceof ScopeAware)) {
         result =  ((ScopeAware) parent).getVariableDefinitions();
      }
      if(result == null){
         result = new HashMap<String, SymbolDefinition>();
      }
      if(stmts != null){
         for(Statement stmt: stmts){
            if(stmt instanceof ExpressionStmt){
               ExpressionStmt exprStmt = (ExpressionStmt) stmt;
               Expression expr = exprStmt.getExpression();
               if(expr instanceof VariableDeclarationExpr){
                  VariableDeclarationExpr vde = (VariableDeclarationExpr) expr;
                  List<VariableDeclarator> vars = vde.getVars();
                  if(vars != null){
                     for(VariableDeclarator vd: vars){
                        result.put(vd.getSymbolName(), vd);
                     }
                  }
               }
            }
         }
      }
      return result;
   }
   
   @Override
   public Map<String, List<SymbolDefinition>> getMethodDefinitions(){
      Node parent = getParentNode();
      while (parent != null && parent instanceof ScopeAware) {
         parent = parent.getParentNode();
      }
      if (parent != null && (parent instanceof ScopeAware)) {
         return ((ScopeAware) parent).getMethodDefinitions();
      }
      return new HashMap<String, List<SymbolDefinition>>();
   }

   @Override
   public Map<String, SymbolDefinition> getTypeDefinitions() {
      Node parent = getParentNode();
      while (parent != null && parent instanceof ScopeAware) {
         parent = parent.getParentNode();
      }
      if (parent != null && (parent instanceof ScopeAware)) {
         return ((ScopeAware) parent).getTypeDefinitions();
      }
      return new HashMap<String, SymbolDefinition>();
   }
}