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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      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 
     17 package android.databinding.tool.expr;
     18 
     19 import android.databinding.tool.reflection.ModelAnalyzer;
     20 import android.databinding.tool.reflection.ModelClass;
     21 import android.databinding.tool.writer.KCode;
     22 
     23 import java.util.ArrayList;
     24 import java.util.List;
     25 
     26 public class SymbolExpr extends Expr {
     27     String mText;
     28     Class mType;
     29 
     30     SymbolExpr(String text, Class type) {
     31         super();
     32         mText = text;
     33         mType = type;
     34     }
     35 
     36     public String getText() {
     37         return mText;
     38     }
     39 
     40     @Override
     41     protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) {
     42         return modelAnalyzer.findClass(mType);
     43     }
     44 
     45     @Override
     46     protected String computeUniqueKey() {
     47         return mType.getSimpleName() + mText;
     48     }
     49 
     50     @Override
     51     public String getInvertibleError() {
     52         return "Symbol '" + mText + "' cannot be the target of a two-way binding expression";
     53     }
     54 
     55     @Override
     56     protected KCode generateCode(boolean expand) {
     57         return new KCode(getText());
     58     }
     59 
     60     @Override
     61     protected List<Dependency> constructDependencies() {
     62         return new ArrayList<Dependency>();
     63     }
     64 }
     65