| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.databinding.tool.expr; |
| |
| import android.databinding.tool.reflection.ModelAnalyzer; |
| import android.databinding.tool.reflection.ModelClass; |
| import android.databinding.tool.solver.ExecutionPath; |
| import android.databinding.tool.writer.KCode; |
| |
| import com.google.common.collect.Lists; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class BracketExpr extends Expr { |
| |
| public enum BracketAccessor { |
| ARRAY, |
| LIST, |
| MAP, |
| } |
| |
| private BracketAccessor mAccessor; |
| |
| BracketExpr(Expr target, Expr arg) { |
| super(target, arg); |
| } |
| |
| @Override |
| protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) { |
| ModelClass targetType = getTarget().getResolvedType(); |
| if (targetType.isArray()) { |
| mAccessor = BracketAccessor.ARRAY; |
| } else if (targetType.isList()) { |
| mAccessor = BracketAccessor.LIST; |
| } else if (targetType.isMap()) { |
| mAccessor = BracketAccessor.MAP; |
| } else { |
| throw new IllegalArgumentException("Cannot determine variable type used in [] " + |
| "expression. Cast the value to List, Map, " + |
| "or array. Type detected: " + targetType.toJavaCode()); |
| } |
| return targetType.getComponentType(); |
| } |
| |
| @Override |
| public List<ExecutionPath> toExecutionPath(List<ExecutionPath> paths) { |
| final List<ExecutionPath> targetPaths = getTarget().toExecutionPath(paths); |
| // after this, we need a null check. |
| List<ExecutionPath> result = new ArrayList<ExecutionPath>(); |
| if (getTarget() instanceof StaticIdentifierExpr) { |
| result.addAll(toExecutionPathInOrder(paths, getTarget())); |
| } else { |
| for (ExecutionPath path : targetPaths) { |
| Expr cmp = getModel().comparison("!=", getTarget(), |
| getModel().symbol("null", Object.class)); |
| path.addPath(cmp); |
| final ExecutionPath subPath = path.addBranch(cmp, true); |
| if (subPath != null) { |
| final List<ExecutionPath> argPath = getArg().toExecutionPath(subPath); |
| result.addAll(addJustMeToExecutionPath(argPath)); |
| } |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| protected List<Dependency> constructDependencies() { |
| final List<Dependency> dependencies = constructDynamicChildrenDependencies(); |
| for (Dependency dependency : dependencies) { |
| if (dependency.getOther() == getTarget()) { |
| dependency.setMandatory(true); |
| } |
| } |
| return dependencies; |
| } |
| |
| protected String computeUniqueKey() { |
| final String targetKey = getTarget().computeUniqueKey(); |
| return join(targetKey, "$", getArg().computeUniqueKey(), "$"); |
| } |
| |
| @Override |
| public String getInvertibleError() { |
| return null; |
| } |
| |
| public Expr getTarget() { |
| return getChildren().get(0); |
| } |
| |
| public Expr getArg() { |
| return getChildren().get(1); |
| } |
| |
| public BracketAccessor getAccessor() { |
| return mAccessor; |
| } |
| |
| public boolean argCastsInteger() { |
| return mAccessor != BracketAccessor.MAP && getArg().getResolvedType().isObject(); |
| } |
| |
| @Override |
| protected KCode generateCode() { |
| String cast = argCastsInteger() ? "(Integer) " : ""; |
| switch (getAccessor()) { |
| case ARRAY: { |
| return new KCode(). |
| app("getFromArray(", getTarget().toCode()). |
| app(", "). |
| app(cast, getArg().toCode()).app(")"); |
| } |
| case LIST: { |
| ModelClass listType = ModelAnalyzer.getInstance().findClass(java.util.List.class). |
| erasure(); |
| ModelClass targetType = getTarget().getResolvedType().erasure(); |
| if (listType.isAssignableFrom(targetType)) { |
| return new KCode(). |
| app("getFromList(", getTarget().toCode()). |
| app(", "). |
| app(cast, getArg().toCode()). |
| app(")"); |
| } else { |
| return new KCode(). |
| app("", getTarget().toCode()). |
| app(".get("). |
| app(cast, getArg().toCode()). |
| app(")"); |
| } |
| } |
| case MAP: |
| return new KCode(). |
| app("", getTarget().toCode()). |
| app(".get(", getArg().toCode()). |
| app(")"); |
| } |
| throw new IllegalStateException("Invalid BracketAccessor type"); |
| } |
| |
| @Override |
| public Expr generateInverse(ExprModel model, Expr value, String bindingClassName) { |
| Expr arg = getArg().cloneToModel(model); |
| arg = argCastsInteger() |
| ? model.castExpr("int", model.castExpr("Integer", arg)) |
| : arg; |
| StaticIdentifierExpr viewDataBinding = |
| model.staticIdentifier(ModelAnalyzer.VIEW_DATA_BINDING); |
| viewDataBinding.setUserDefinedType(ModelAnalyzer.VIEW_DATA_BINDING); |
| ModelClass targetType = getTarget().getResolvedType(); |
| if ((targetType.isList() || targetType.isMap()) && |
| value.getResolvedType().isPrimitive()) { |
| ModelClass boxed = value.getResolvedType().box(); |
| value = model.castExpr(boxed.toJavaCode(), value); |
| } |
| List<Expr> args = Lists.newArrayList(getTarget().cloneToModel(model), arg, value); |
| MethodCallExpr setter = model.methodCall(viewDataBinding, "setTo", args); |
| setter.setAllowProtected(); |
| return setter; |
| } |
| |
| @Override |
| public Expr cloneToModel(ExprModel model) { |
| return model.bracketExpr(getTarget().cloneToModel(model), getArg().cloneToModel(model)); |
| } |
| |
| @Override |
| public String toString() { |
| return getTarget().toString() + '[' + getArg() + ']'; |
| } |
| } |