[GROOVY-782] Provide a xml printer to print Node as xml format

• Type: Wish
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0-beta-10
• Fix Version/s: 1.0-JSR-3
• Component/s: groovy-jdk
• Environment: All
• Assignee: sormuras
• Reporter: wangbin
• Created: 17/Mar/05 05:35
• Updated: 13/Jul/05 14:00
• Resolved: 13/Jul/05 14:00

Description

Till beta 10, we can only use groovy.util.NodePrinter to print a note, but we can not output it in xml format. Maybe we should print it out in xml format.
Below is the every simple implementation for it.

import groovy.xml.*;
import groovy.util.*;
import java.io.*;
import java.util.*;

class XmlNodePrinter {
out = new IndentPrinter(new PrintWriter(new OutputStreamWriter(System.out)));

private String getWritableString(String source) {
StringBuffer buf = new StringBuffer();
for (c in source) {

switch (c)

{ case '&' : buf.append("&"); //$NON-NLS-1$ break; case '<' : buf.append("<"); //$NON-NLS-1$ break; case '>' : buf.append(">"); //$NON-NLS-1$ break; //case '\'' : // buf.append("'"); //$NON-NLS-1$ // break; //case '\"' : // buf.append("""); //$NON-NLS-1$ // break; default : buf.append(c); break; }

}
return buf.toString();
}

protected String writeShallow(Node node, boolean terminate) {
String sep = System.getProperty("line.separator"); //$NON-NLS-1$
StringBuffer buffer = new StringBuffer("<" + node.name()); //$NON-NLS-1$

attrs = new ArrayList(node.attributes().entrySet());

if (attrs.size() == 1) {
if (attrs[0].getValue().length() > 0)

{ buffer.append(" " + getAttribute(attrs[0])); //$NON-NLS-1$ }

} else {
for (each in attrs)

{ if (each.getValue().length() > 0) buffer.append(sep + getIndent() + " " + getAttribute(each)); //$NON-NLS-1$ }

}
if (terminate)
buffer.append("/"); //$NON-NLS-1$
buffer.append(">"); //$NON-NLS-1$

return buffer.toString();
}

private String getAttribute(Map.Entry entry)

{ return entry.getKey() + "=\"" + entry.getValue() + "\""; }

public String write(Node node) {
String sep = System.getProperty("line.separator"); //$NON-NLS-1$
StringBuffer buffer = new StringBuffer();

Object value = node.value();
if (value instanceof List && value.size() > 0) {
buffer.append(writeShallow(node, false) + sep);

for (each in value)

{ indentLevel = indentLevel + 1; buffer.append(getIndent() + write(each) + sep); indentLevel = indentLevel - 1; }

buffer.append(getIndent() + "</" + node.name() + ">"); //$NON-NLS-1$ //$NON-NLS-2$

} else if (value instanceof String && value.length() > 0) {
buffer.append(writeShallow(node, false));
if (value.length() < 80 )

{ buffer.append(getWritableString(value) + "</" + node.name() + ">" ); }

else

{ buffer.append(sep + getIndent() + " " + getWritableString(value)); //$NON-NLS-1$ buffer.append(sep + getIndent() + "</" + node.name() + ">"); //$NON-NLS-1$ //$NON-NLS-2$ }

} else

{ buffer.append(writeShallow(node, true)); }

return buffer.toString();
}
// user can custom the indent.
public void setIndent(String indent) {
}

public String getIndent()

{ // default using 4 whitespace s = " " * indentLevel; return s; }

private int indentLevel = 0;
}

Issue Links

• is duplicated by: GROOVY-940 factor out groovy.util.XmlTemplateEngine.XmlPrinter as stand-alone class
• is related to: GROOVY-839 Adding valid xml start and end tags for groovy template scripts