| /** |
| * 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.atlas.groovy; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * Groovy expression that represents a Groovy closure. |
| */ |
| public class ClosureExpression extends AbstractGroovyExpression { |
| |
| /** |
| * Variable declaration in a closure. |
| */ |
| public static class VariableDeclaration { |
| private String type; |
| private String varName; |
| |
| public VariableDeclaration(String type, String varName) { |
| super(); |
| this.type = type; |
| this.varName = varName; |
| } |
| |
| public VariableDeclaration(String varName) { |
| this.varName = varName; |
| } |
| |
| public void append(GroovyGenerationContext context) { |
| if (type != null) { |
| context.append(type); |
| context.append(" "); |
| } |
| context.append(varName); |
| } |
| } |
| private List<VariableDeclaration> vars = new ArrayList<>(); |
| private StatementListExpression body = new StatementListExpression(); |
| |
| public ClosureExpression(String... varNames) { |
| this(null, varNames); |
| } |
| |
| public ClosureExpression(GroovyExpression initialStmt, String... varNames) { |
| this(Arrays.asList(varNames), initialStmt); |
| } |
| |
| public ClosureExpression(List<String> varNames, GroovyExpression initialStmt) { |
| if (initialStmt != null) { |
| this.body.addStatement(initialStmt); |
| } |
| for (String varName : varNames) { |
| vars.add(new VariableDeclaration(varName)); |
| } |
| } |
| |
| public ClosureExpression(GroovyExpression initialStmt, List<VariableDeclaration> varNames) { |
| if (initialStmt != null) { |
| this.body.addStatement(initialStmt); |
| } |
| vars.addAll(varNames); |
| } |
| |
| public void addStatement(GroovyExpression expr) { |
| body.addStatement(expr); |
| } |
| |
| public void addStatements(List<GroovyExpression> exprs) { |
| body.addStatements(exprs); |
| } |
| |
| public void replaceStatement(int index, GroovyExpression newExpr) { |
| body.replaceStatement(index, newExpr); |
| } |
| |
| @Override |
| public void generateGroovy(GroovyGenerationContext context) { |
| |
| context.append("{"); |
| if (!vars.isEmpty()) { |
| Iterator<VariableDeclaration> varIt = vars.iterator(); |
| while(varIt.hasNext()) { |
| VariableDeclaration var = varIt.next(); |
| var.append(context); |
| if (varIt.hasNext()) { |
| context.append(", "); |
| } |
| } |
| context.append("->"); |
| } |
| body.generateGroovy(context); |
| context.append("}"); |
| } |
| |
| @Override |
| public List<GroovyExpression> getChildren() { |
| return Collections.<GroovyExpression>singletonList(body); |
| } |
| |
| public List<GroovyExpression> getStatements() { |
| return body.getStatements(); |
| } |
| |
| @Override |
| public GroovyExpression copy(List<GroovyExpression> newChildren) { |
| assert newChildren.size() == 1; |
| return new ClosureExpression(newChildren.get(0), vars); |
| } |
| } |