| /* |
| * 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.codehaus.groovy.ast.expr; |
| |
| import org.codehaus.groovy.GroovyBugError; |
| import org.codehaus.groovy.ast.AnnotatedNode; |
| import org.codehaus.groovy.ast.ClassHelper; |
| import org.codehaus.groovy.ast.ClassNode; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Represents a base class for expressions which evaluate as an object |
| */ |
| public abstract class Expression extends AnnotatedNode { |
| public static final Expression[] EMPTY_ARRAY = new Expression[0]; |
| private ClassNode type=ClassHelper.DYNAMIC_TYPE; |
| |
| /** |
| * Return a copy of the expression calling the transformer on any nested expressions |
| * @param transformer |
| */ |
| public abstract Expression transformExpression(ExpressionTransformer transformer); |
| |
| /** |
| * Transforms the list of expressions |
| * @return a new list of transformed expressions |
| */ |
| protected List<Expression> transformExpressions(List<? extends Expression> expressions, ExpressionTransformer transformer) { |
| List<Expression> list = new ArrayList<Expression>(expressions.size()); |
| for (Expression expr : expressions ) { |
| list.add(transformer.transform(expr)); |
| } |
| return list; |
| } |
| |
| /** |
| * Transforms the list of expressions, and checks that all transformed expressions have the given type. |
| * |
| * @return a new list of transformed expressions |
| */ |
| protected <T extends Expression> List<T> transformExpressions(List<? extends Expression> expressions, |
| ExpressionTransformer transformer, Class<T> transformedType) { |
| List<T> list = new ArrayList<T>(expressions.size()); |
| for (Expression expr : expressions) { |
| Expression transformed = transformer.transform(expr); |
| if (!transformedType.isInstance(transformed)) |
| throw new GroovyBugError(String.format("Transformed expression should have type %s but has type %s", |
| transformedType, transformed.getClass())); |
| list.add(transformedType.cast(transformed)); |
| } |
| return list; |
| } |
| |
| public ClassNode getType() { |
| return type; |
| } |
| |
| public void setType(ClassNode t) { |
| type=t; |
| } |
| } |