java/java-impl/src/com/intellij/refactoring/introduceparameterobject/usageInfo/ReplaceParameterAssignmentWithCall.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.refactoring.introduceparameterobject.usageInfo;
  17
  18 import com.intellij.psi.PsiAssignmentExpression;
  19 import com.intellij.psi.PsiExpression;
  20 import com.intellij.psi.PsiReferenceExpression;
  21 import com.intellij.psi.util.PsiTreeUtil;
  22 import com.intellij.refactoring.psi.MutationUtils;
  23 import com.intellij.refactoring.util.FixableUsageInfo;
  24 import com.intellij.util.IncorrectOperationException;
  25
  26 public class ReplaceParameterAssignmentWithCall extends FixableUsageInfo {
  27   private final PsiReferenceExpression expression;
  28   private final String newParameterName;
  29   private final String setterName;
  30   private final String getterName;
  31
  32   public ReplaceParameterAssignmentWithCall(PsiReferenceExpression element, String newParameterName, String setterName, String getterName) {
  33     super(element);
  34     this.setterName = setterName;
  35     this.getterName = getterName;
  36     this.newParameterName = newParameterName;
  37     expression = element;
  38   }
  39
  40   public void fixUsage() throws IncorrectOperationException {
  41     final PsiAssignmentExpression assignment = PsiTreeUtil.getParentOfType(expression, PsiAssignmentExpression.class);
  42     assert assignment != null;
  43     final PsiExpression rhs = assignment.getRExpression();
  44     if (rhs == null) {
  45       return;
  46     }
  47     final String rhsText = rhs.getText();
  48     final String operator = assignment.getOperationSign().getText();
  49     final String newExpression;
  50     if ("=".equals(operator)) {
  51       newExpression = newParameterName + '.' + setterName + '(' + rhsText + ')';
  52     }
  53     else {
  54       final String strippedOperator = operator.substring(0, operator.length() - 1);
  55       newExpression =
  56         newParameterName + '.' + setterName + '(' + newParameterName + '.' + getterName + "()" + strippedOperator + rhsText + ')';
  57     }
  58     MutationUtils.replaceExpression(newExpression, assignment);
  59   }
  60
  61 }