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Java 8 parser library
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/* 
  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 .*/
package org.walkmod.javalang.ast.expr;

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.SymbolReference;
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 FieldAccessExpr extends Expression implements SymbolReference {

   private Expression scope;

   private List typeArgs;

   private String field;

   private SymbolDefinition symbolDefinition;

   public FieldAccessExpr() {
   }

   public FieldAccessExpr(Expression scope, String field) {
      setScope(scope);
      this.field = field;
   }

   public FieldAccessExpr(Expression scope, List typeArgs, String field) {
      setScope(scope);
      setTypeArgs(typeArgs);
      this.field = field;
   }

   public FieldAccessExpr(int beginLine, int beginColumn, int endLine, int endColumn, Expression scope,
         List typeArgs, String field) {
      super(beginLine, beginColumn, endLine, endColumn);
      setScope(scope);
      setTypeArgs(typeArgs);
      this.field = field;
   }

   @Override
   public boolean removeChild(Node child) {
      boolean result = false;
      if (child != null) {
         if (scope == child) {
            scope = null;
            result = true;
         }

         if (!result) {
            if (typeArgs != null) {
               if (child instanceof Type) {
                  List typeArgsAux = new LinkedList(typeArgs);
                  result = typeArgsAux.remove(child);
                  typeArgs = typeArgsAux;
               }
            }
         }
      }
      if (result) {
         updateReferences(child);
      }
      return result;
   }

   @Override
   public List getChildren() {
      List children = new LinkedList();
      if (scope != null) {
         children.add(scope);
      }
      if (typeArgs != null) {
         children.addAll(typeArgs);
      }
      return children;
   }

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

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

   public String getField() {
      return field;
   }

   public Expression getScope() {
      return scope;
   }

   public List getTypeArgs() {
      return typeArgs;
   }

   public void setField(String field) {
      this.field = field;
   }

   public void setScope(Expression scope) {
      if (this.scope != null) {
         updateReferences(this.scope);
      }
      this.scope = scope;
      setAsParentNodeOf(scope);
   }

   public void setTypeArgs(List typeArgs) {
      this.typeArgs = typeArgs;
      setAsParentNodeOf(typeArgs);
   }

   @Override
   public SymbolDefinition getSymbolDefinition() {
      return symbolDefinition;
   }

   @Override
   public void setSymbolDefinition(SymbolDefinition symbolDefinition) {
      this.symbolDefinition = symbolDefinition;
   }

   @Override
   public boolean replaceChildNode(Node oldChild, Node newChild) {
      boolean updated = false;

      if (oldChild == scope) {
         setScope((Expression) newChild);
         updated = true;
      }
      if (!updated) {
         updated = replaceChildNodeInList(oldChild, newChild, typeArgs);
      }

      return updated;
   }

   @Override
   public FieldAccessExpr clone() throws CloneNotSupportedException {
      return new FieldAccessExpr(clone(getScope()), clone(getTypeArgs()), getField());
   }
   
   @Override
   public Map getVariableDefinitions(){
      Node parent = getParentNode();
      while (parent != null && parent instanceof ScopeAware) {
         parent = parent.getParentNode();
      }
      if (parent != null && (parent instanceof ScopeAware)) {
         return ((ScopeAware) parent).getVariableDefinitions();
      }
      return new HashMap();
   }
   
   @Override
   public Map> 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>();
   }

   @Override
   public Map 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();
   }
}