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.solver.ExecutionPath; 22 import android.databinding.tool.writer.KCode; 23 24 import java.util.ArrayList; 25 import java.util.List; 26 27 public class SymbolExpr extends Expr { 28 String mText; 29 Class mType; 30 31 SymbolExpr(String text, Class type) { 32 super(); 33 mText = text; 34 mType = type; 35 } 36 37 public String getText() { 38 return mText; 39 } 40 41 @Override 42 protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) { 43 return modelAnalyzer.findClass(mType); 44 } 45 46 @Override 47 protected String computeUniqueKey() { 48 return mType.getSimpleName() + mText; 49 } 50 51 @Override 52 public String getInvertibleError() { 53 return "Symbol '" + mText + "' cannot be the target of a two-way binding expression"; 54 } 55 56 @Override 57 protected KCode generateCode() { 58 return new KCode(getText()); 59 } 60 61 @Override 62 public Expr cloneToModel(ExprModel model) { 63 return model.symbol(mText, mType); 64 } 65 66 @Override 67 protected List<Dependency> constructDependencies() { 68 return new ArrayList<Dependency>(); 69 } 70 71 @Override 72 public boolean canBeEvaluatedToAVariable() { 73 return !void.class.equals(mType); 74 } 75 76 @Override 77 public List<ExecutionPath> toExecutionPath(List<ExecutionPath> paths) { 78 if (void.class.equals(mType)) { 79 return paths; 80 } 81 return super.toExecutionPath(paths); 82 } 83 84 @Override 85 public String toString() { 86 return mText; 87 } 88 } 89
