| /* |
| $Id$ |
| |
| Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. |
| |
| Redistribution and use of this software and associated documentation |
| ("Software"), with or without modification, are permitted provided |
| that the following conditions are met: |
| |
| 1. Redistributions of source code must retain copyright |
| statements and notices. Redistributions must also contain a |
| copy of this document. |
| |
| 2. Redistributions in binary form must reproduce the |
| above copyright notice, this list of conditions and the |
| following disclaimer in the documentation and/or other |
| materials provided with the distribution. |
| |
| 3. The name "groovy" must not be used to endorse or promote |
| products derived from this Software without prior written |
| permission of The Codehaus. For written permission, |
| please contact info@codehaus.org. |
| |
| 4. Products derived from this Software may not be called "groovy" |
| nor may "groovy" appear in their names without prior written |
| permission of The Codehaus. "groovy" is a registered |
| trademark of The Codehaus. |
| |
| 5. Due credit should be given to The Codehaus - |
| http://groovy.codehaus.org/ |
| |
| THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS |
| ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT |
| NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| */ |
| 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(")"); |
| } |
| |
| } |