VariableDeclarationExpr.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.expr;

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

import org.walkmod.javalang.ast.Node;
import org.walkmod.javalang.ast.body.ModifierSet;
import org.walkmod.javalang.ast.body.VariableDeclarator;
import org.walkmod.javalang.ast.type.Type;
import org.walkmod.javalang.visitors.GenericVisitor;
import org.walkmod.javalang.visitors.VoidVisitor;

/**
 * @author Julio Vilmar Gesser
 */
public final class VariableDeclarationExpr extends Expression {

   private int modifiers;

   private List<AnnotationExpr> annotations;

   private Type type;

   private List<VariableDeclarator> vars;

   public VariableDeclarationExpr() {
   }

   public VariableDeclarationExpr(Type type, List<VariableDeclarator> vars) {
      setType(type);
      setVars(vars);
   }

   public VariableDeclarationExpr(int modifiers, Type type, List<VariableDeclarator> vars) {
      this.modifiers = modifiers;
      setType(type);
      setVars(vars);
   }

   public VariableDeclarationExpr(int beginLine, int beginColumn, int endLine, int endColumn, int modifiers,
         List<AnnotationExpr> annotations, Type type, List<VariableDeclarator> vars) {
      super(beginLine, beginColumn, endLine, endColumn);
      this.modifiers = modifiers;
      setAnnotations(annotations);
      setType(type);
      setVars(vars);
   }

   @Override
   public boolean removeChild(Node child) {
      boolean result = false;
      if (child != null) {
         if (annotations != null) {
            if (child instanceof AnnotationExpr) {
               List<AnnotationExpr> annotationsAux = new LinkedList<AnnotationExpr>(annotations);
               result = annotationsAux.remove(child);
               annotations = annotationsAux;
            }
         }
         if (!result) {
            if (type == child) {
               type = null;
               result = true;
            }
         }
         if (!result) {
            if (vars != null) {
               if (child instanceof VariableDeclarator) {
                  List<VariableDeclarator> varsAux = new LinkedList<VariableDeclarator>(vars);
                  result = varsAux.remove(child);
                  vars = varsAux;
               }
            }
         }
      }
      if(result){
         updateReferences(child);
      }
      return result;
   }

   @Override
   public List<Node> getChildren() {
      List<Node> children = new LinkedList<Node>();
      if (annotations != null) {
         children.addAll(annotations);
      }
      if (type != null) {
         children.add(type);
      }
      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<AnnotationExpr> getAnnotations() {
      return annotations;
   }

   /**
    * Return the modifiers of this variable declaration.
    * 
    * @see ModifierSet
    * @return modifiers
    */
   public int getModifiers() {
      return modifiers;
   }

   public Type getType() {
      return type;
   }

   public List<VariableDeclarator> getVars() {
      return vars;
   }

   public void setAnnotations(List<AnnotationExpr> annotations) {
      this.annotations = annotations;
      setAsParentNodeOf(annotations);
   }

   public void setModifiers(int modifiers) {
      this.modifiers = modifiers;
   }

   public void setType(Type type) {
      this.type = type;
      setAsParentNodeOf(type);
   }

   public void setVars(List<VariableDeclarator> vars) {
      this.vars = vars;
      setAsParentNodeOf(vars);
   }

   @Override
   public boolean replaceChildNode(Node oldChild, Node newChild) {
      boolean updated = false;
      if (oldChild == type) {
         type = (Type) newChild;
         updated = true;
      }
      if (!updated) {
         updated = replaceChildNodeInList(oldChild, newChild, annotations);

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

   @Override
   public VariableDeclarationExpr clone() throws CloneNotSupportedException {
      return new VariableDeclarationExpr(clone(type), clone(vars));
   }

}