LambdaExpr.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.HashMap;
import java.util.LinkedList;

/* 
 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/>.*/

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.body.Parameter;
import org.walkmod.javalang.ast.stmt.Statement;
import org.walkmod.javalang.visitors.GenericVisitor;
import org.walkmod.javalang.visitors.VoidVisitor;

/**
 * Lambda expressions.
 * 
 * @author Raquel Pau
 *
 */
public class LambdaExpr extends Expression implements SymbolReference {

   private List<Parameter> parameters;

   private boolean parametersEnclosed;

   private Statement body;

   private SymbolDefinition symbolDefinition;

   public LambdaExpr() {
   }

   public LambdaExpr(int beginLine, int beginColumn, int endLine, int endColumn, List<Parameter> parameters,
         Statement body, boolean parametersEnclosed) {

      super(beginLine, beginColumn, endLine, endColumn);
      setParameters(parameters);
      setBody(body);

      if (this.parameters != null && this.parameters.size() == 1 && this.parameters.get(0).getType() == null) {
         this.parametersEnclosed = parametersEnclosed;
      } else {
         this.parametersEnclosed = true;
      }
   }

   public LambdaExpr(List<Parameter> parameters, Statement body, boolean parametersEnclosed) {

      setParameters(parameters);
      setBody(body);

      if (this.parameters != null && this.parameters.size() == 1 && this.parameters.get(0).getType() == null) {
         this.parametersEnclosed = parametersEnclosed;
      } else {
         this.parametersEnclosed = true;
      }
   }

   @Override
   public boolean removeChild(Node child) {
      boolean result = false;
      if (child != null) {
         if (parameters != null) {
            if (child instanceof Parameter) {
               List<Parameter> parametersAux = new LinkedList<Parameter>(parameters);
               result = parametersAux.remove(child);
               parameters = parametersAux;
            }
         }
         if (!result) {
            if (body == child) {
               body = null;
               result = true;
            }
         }
      }
      if(result){
         updateReferences(child);
      }
      return result;
   }

   @Override
   public List<Node> getChildren() {
      List<Node> children = new LinkedList<Node>();

      if (parameters != null) {
         children.addAll(parameters);
      }
      if (body != null) {
         children.add(body);
      }
      return children;
   }

   public List<Parameter> getParameters() {
      return parameters;
   }

   public void setParameters(List<Parameter> parameters) {
      this.parameters = parameters;
      setAsParentNodeOf(parameters);
   }

   public Statement getBody() {
      return body;
   }

   public void setBody(Statement body) {
      if (this.body != null) {
         updateReferences(this.body);
      }
      this.body = body;
      setAsParentNodeOf(body);
   }

   @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 boolean isParametersEnclosed() {
      return parametersEnclosed;
   }

   public void setParametersEnclosed(boolean parametersEnclosed) {
      this.parametersEnclosed = parametersEnclosed;
   }

   @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 == body) {
         setBody((Statement) newChild);
         updated = true;
      }
      if (!updated) {
         updated = replaceChildNodeInList(oldChild, newChild, parameters);
      }

      return updated;
   }

   @Override
   public LambdaExpr clone() throws CloneNotSupportedException {
      return new LambdaExpr(clone(parameters), clone(body), parametersEnclosed);
   }
   
   @Override
   public Map<String, SymbolDefinition> 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<String, SymbolDefinition>();
   }
   
   @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>();
   }

}