[ http://issues.apache.org/jira/browse/BEANUTILS-172?page=all ]
Niall Pemberton updated BEANUTILS-172:
--------------------------------------
Bugzilla Id: (was: 21483)
Component/s: Bean / Property Utils
> [beanutils] BeanUtils and PropertyUtils toString function (code included)
> -------------------------------------------------------------------------
>
> Key: BEANUTILS-172
> URL: http://issues.apache.org/jira/browse/BEANUTILS-172
> Project: Commons BeanUtils
> Issue Type: Improvement
> Components: Bean / Property Utils
> Environment: Operating System: All
> Platform: All
> Reporter: Ryan Barker
> Priority: Minor
> Fix For: 1.8.0
>
> Attachments: BeanToStringBuilder.java
>
>
> I thought it would be nice if there was an easy way to have a toString
> function
> that would take a bean and output a string, as writing toString functions for
> the BeanUtils class gets old fast. So I went and wrote one based off the
> toString function for org.apache.struts.action.DynaActionForm.
> The following function will output the contents of a bean in a very verbose
> manner. I would suggest that this version is suitable for PropertyUtils,
> while a
> BeanUtils version would not have the code blocks for the verbose List, Array
> and Map strings. This code uses recursion to handle nested beans.
> Feel free to email me regarding this code
> ////////////////////////////////////////////////
> // Code Start
> ////////////////////////////////////////////////
> public static String toString(Object value) {
> if (value == null) {
> return "<NULL>";
> }
> StringBuffer sb = new StringBuffer();
> if (value.getClass().isArray()) {
> // verbose array output
> int n = Array.getLength(value);
> sb.append("{");
> for (int j = 0; j < n; j++) {
> if (j > 0) {
> sb.append(',');
> }
> sb.append(toString(Array.get(value, j)));
> }
> sb.append("}");
> } else if (value instanceof List) {
> // verbose list output
> int n = ((List) value).size();
> sb.append("{");
> for (Iterator j=((List) value).iterator(); j.hasNext(); ) {
> sb.append(toString(j.next()));
> if (j.hasNext()) {
> sb.append(',');
> }
> }
> sb.append("}");
> } else if (value instanceof Map) {
> // verbose map output
> Iterator j = ((Map) value).entrySet().iterator();
> sb.append("{");
> while (j.hasNext()) {
> Map.Entry e = (Map.Entry) j.next();
> sb.append(e.getKey());
> sb.append('=');
> sb.append(toString(e.getValue()));
> if (j.hasNext()) {
> sb.append(',');
> }
> }
> sb.append("}");
> } else if (ConvertUtils.lookup(value.getClass()) != null) {
> // use the convertutils for this parameter
> sb.append(ConvertUtils.convert(value));
> } else {
> // check if this class has a toString method declared anywhere for it
> Method toStringMethod =
> MethodUtils.getAccessibleMethod(value.getClass(),"toString",new Class [0]);
> if (toStringMethod == null ||
> toStringMethod.getDeclaringClass().getName().equals("java.lang.Object")) {
> // its a bean!
> sb.append("[className=");
> sb.append(value.getClass().getName());
> // find its properties
> Map props = null;
> try {
> props = PropertyUtils.describe(value);
> } catch (Exception e) {
> sb.append("<EXCEPTION>");
> }
> // and print them
> if (props != null) {
> for (Iterator i=props.entrySet().iterator(); i.hasNext(); ) {
> Map.Entry entry = (Map.Entry) i.next();
> Object entryValue = entry.getValue();
> // dont print the class name twice
> if (!(entryValue instanceof Class)) {
> sb.append(',');
> sb.append(entry.getKey());
> sb.append('=');
> sb.append(toString(entry.getValue()));
> }
> }
> }
> sb.append("]");
> } else {
> // use the normal toString method
> sb.append(value.toString());
> }
> }
> return (sb.toString());
> }
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