| /* |
| * Copyright 2003-2007 the original author or authors. |
| * |
| * 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 groovy.util; |
| |
| |
| import org.codehaus.groovy.runtime.InvokerHelper; |
| |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * A helper class for creating nested trees of data |
| * |
| * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> |
| * @author Christian Stein |
| * @version $Revision$ |
| */ |
| public class NodePrinter { |
| |
| protected final IndentPrinter out; |
| |
| public NodePrinter() { |
| this(new IndentPrinter(new PrintWriter(new OutputStreamWriter(System.out)))); |
| } |
| |
| public NodePrinter(PrintWriter out) { |
| this(new IndentPrinter(out)); |
| } |
| |
| public NodePrinter(IndentPrinter out) { |
| if (out == null) { |
| throw new NullPointerException("IndentPrinter 'out' must not be null!"); |
| } |
| this.out = out; |
| } |
| |
| public void print(Node node) { |
| out.printIndent(); |
| printName(node); |
| Map attributes = node.attributes(); |
| boolean hasAttributes = attributes != null && !attributes.isEmpty(); |
| if (hasAttributes) { |
| printAttributes(attributes); |
| } |
| Object value = node.value(); |
| if (value instanceof List) { |
| if (!hasAttributes) { |
| out.print("()"); |
| } |
| printList((List) value); |
| } |
| else { |
| if (value instanceof String) { |
| out.print("('"); |
| out.print((String) value); |
| out.println("')"); |
| } |
| else { |
| out.println("()"); |
| } |
| } |
| out.flush(); |
| } |
| |
| protected void printName(Node node) { |
| Object name = node.name(); |
| if (name != null) { |
| out.print(name.toString()); |
| } |
| else { |
| out.print("null"); |
| } |
| } |
| |
| protected void printList(List list) { |
| if (list.isEmpty()) { |
| out.println(""); |
| } |
| else { |
| out.println(" {"); |
| out.incrementIndent(); |
| for (Iterator iter = list.iterator(); iter.hasNext();) { |
| Object value = iter.next(); |
| if (value instanceof Node) { |
| print((Node) value); |
| } |
| else { |
| out.printIndent(); |
| out.print("builder.append("); |
| out.print(InvokerHelper.toString(value)); |
| out.println(")"); |
| } |
| } |
| out.decrementIndent(); |
| out.printIndent(); |
| out.println("}"); |
| } |
| } |
| |
| |
| protected void printAttributes(Map attributes) { |
| out.print("("); |
| boolean first = true; |
| for (Iterator iter = attributes.entrySet().iterator(); iter.hasNext();) { |
| Map.Entry entry = (Map.Entry) iter.next(); |
| if (first) { |
| first = false; |
| } |
| else { |
| out.print(", "); |
| } |
| out.print(entry.getKey().toString()); |
| out.print(":"); |
| if (entry.getValue() instanceof String) { |
| out.print("'" + entry.getValue() + "'"); |
| } |
| else { |
| out.print(InvokerHelper.toString(entry.getValue())); |
| } |
| } |
| out.print(")"); |
| } |
| |
| } |