| /******************************************************************************* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.sling.scripting.sightly.java.compiler.impl; |
| |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.sling.scripting.sightly.compiler.RuntimeFunction; |
| import org.apache.sling.scripting.sightly.compiler.expression.ExpressionNode; |
| import org.apache.sling.scripting.sightly.compiler.expression.SideEffectVisitor; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.ArrayLiteral; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.BinaryOperation; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.BooleanConstant; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.Identifier; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.MapLiteral; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.NullLiteral; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.NumericConstant; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.PropertyAccess; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.RuntimeCall; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.StringConstant; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.TernaryOperator; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.UnaryOperation; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.UnaryOperator; |
| import org.apache.sling.scripting.sightly.java.compiler.impl.operator.BinaryOpGen; |
| import org.apache.sling.scripting.sightly.java.compiler.impl.operator.Operators; |
| import org.apache.sling.scripting.sightly.java.compiler.impl.operator.UnaryOpGen; |
| |
| /** |
| * Builds expressions within a sling source file. |
| */ |
| public final class ExpressionTranslator extends SideEffectVisitor { |
| |
| private final JavaSource source; |
| private final VariableAnalyzer analyzer; |
| private final TypeInfo typeInfo; |
| private final Set<String> imports; |
| |
| private ExpressionTranslator(JavaSource source, VariableAnalyzer analyzer, TypeInfo typeInfo, Set<String> imports) { |
| this.source = source; |
| this.analyzer = analyzer; |
| this.typeInfo= typeInfo; |
| this.imports = imports; |
| } |
| |
| public static void buildExpression(ExpressionNode node, |
| JavaSource source, |
| VariableAnalyzer analyzer, |
| TypeInfo typeInfo, |
| Set<String> imports) { |
| ExpressionTranslator builder = new ExpressionTranslator(source, analyzer, typeInfo, imports); |
| builder.traverse(node); |
| } |
| |
| public void traverse(ExpressionNode node) { |
| visit(node); |
| } |
| |
| private void visit(ExpressionNode node) { |
| node.accept(this); |
| } |
| |
| @Override |
| public void visit(PropertyAccess propertyAccess) { |
| if (typeInfo.typeOf(propertyAccess.getTarget()) == Type.MAP) { |
| //Special optimization for maps |
| visit(propertyAccess.getTarget()); |
| source.startCall(SourceGenConstants.MAP_GET, true); |
| visit(propertyAccess.getProperty()); |
| source.endCall(); |
| } else { |
| source.objectModel().startCall(SourceGenConstants.ROM_RESOLVE_PROPERTY, true); |
| visit(propertyAccess.getTarget()); |
| source.separateArgument(); |
| visit(propertyAccess.getProperty()); |
| source.endCall(); |
| } |
| } |
| |
| @Override |
| public void visit(Identifier identifier) { |
| String safeName = analyzer.assignedName(identifier.getName()); |
| source.append(safeName); |
| } |
| |
| @Override |
| public void visit(StringConstant text) { |
| source.stringLiteral(text.getText()); |
| } |
| |
| @Override |
| public void visit(BinaryOperation binaryOperation) { |
| BinaryOpGen opGen = Operators.generatorFor(binaryOperation.getOperator()); |
| source.startExpression(); |
| opGen.generate(source, this, |
| typeInfo.getTyped(binaryOperation.getLeftOperand()), |
| typeInfo.getTyped(binaryOperation.getRightOperand())); |
| source.endExpression(); |
| } |
| |
| @Override |
| public void visit(BooleanConstant booleanConstant) { |
| source.append(Boolean.toString(booleanConstant.getValue())); |
| } |
| |
| @Override |
| public void visit(NumericConstant numericConstant) { |
| source.append(numericConstant.getValue().toString()); //todo: check correctness |
| } |
| |
| @Override |
| public void visit(UnaryOperation unaryOperation) { |
| UnaryOperator operator = unaryOperation.getOperator(); |
| ExpressionNode operand = unaryOperation.getTarget(); |
| UnaryOpGen unaryOpGen = Operators.generatorFor(operator); |
| source.startExpression(); |
| unaryOpGen.generate(source, this, typeInfo.getTyped(operand)); |
| source.endExpression(); |
| } |
| |
| @Override |
| public void visit(TernaryOperator ternaryOperator) { |
| GenHelper.generateTernary(source, this, |
| typeInfo.getTyped(ternaryOperator.getCondition()), |
| typeInfo.getTyped(ternaryOperator.getThenBranch()), |
| typeInfo.getTyped(ternaryOperator.getElseBranch())); |
| } |
| |
| @Override |
| public void visit(RuntimeCall runtimeCall) { |
| String runtimeCallName = runtimeCall.getFunctionName(); |
| source.startMethodCall(SourceGenConstants.RENDER_CONTEXT_INSTANCE, SourceGenConstants.RUNTIME_CALL_METHOD) |
| .stringLiteral(runtimeCallName); |
| int index = 0; |
| for (ExpressionNode arg : runtimeCall.getArguments()) { |
| source.separateArgument(); |
| if (RuntimeFunction.USE.equals(runtimeCallName) && index == 0) { |
| if (arg instanceof StringConstant) { |
| StringConstant constant = (StringConstant) arg; |
| String className = constant.getText(); |
| if (imports.contains(className)) { |
| source.className(className.substring(className.lastIndexOf('.') + 1)); |
| } else { |
| visit(arg); |
| } |
| } else { |
| visit(arg); |
| } |
| } else { |
| visit(arg); |
| } |
| } |
| source.endCall(); |
| } |
| |
| @Override |
| public void visit(MapLiteral mapLiteral) { |
| source.startCall(SourceGenConstants.START_MAP_METHOD).endCall(); |
| for (Map.Entry<String, ExpressionNode> entry : mapLiteral.getMap().entrySet()) { |
| source.startCall(SourceGenConstants.MAP_TYPE_ADD, true) |
| .stringLiteral(entry.getKey()) |
| .separateArgument(); |
| visit(entry.getValue()); |
| source.endCall(); |
| } |
| } |
| |
| @Override |
| public void visit(ArrayLiteral arrayLiteral) { |
| source.startExpression().startArray(); |
| boolean needsComma = false; |
| for (ExpressionNode node : arrayLiteral.getItems()) { |
| if (needsComma) { |
| source.separateArgument(); |
| } |
| visit(node); |
| needsComma = true; |
| } |
| source.endArray().endExpression(); |
| } |
| |
| @Override |
| public void visit(NullLiteral nullLiteral) { |
| source.nullLiteral(); |
| } |
| |
| public VariableAnalyzer getAnalyzer() { |
| return analyzer; |
| } |
| } |