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Struts example source code file (ErrorMessageBuilder.java)

This example Struts source code file (ErrorMessageBuilder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Struts tags/keywords

error, error, errormessagebuilder, errormessagebuilder, object, object, string, stringbuilder, stringbuilder

The Struts ErrorMessageBuilder.java source code

package com.opensymphony.xwork2.ognl;

/**
 * Helper class to build error messages.
 */
public class ErrorMessageBuilder {

    private StringBuilder message = new StringBuilder();

    public static ErrorMessageBuilder create() {
        return new ErrorMessageBuilder();
    }

    private ErrorMessageBuilder() {
    }

    public ErrorMessageBuilder errorSettingExpressionWithValue(String expr, Object value) {
        appenExpression(expr);
        if (value instanceof Object[]) {
            appendValueAsArray((Object[]) value, message);
        } else {
            appendValue(value);
        }
        return this;
    }

    private void appenExpression(String expr) {
        message.append("Error setting expression '");
        message.append(expr);
        message.append("' with value ");
    }

    private void appendValue(Object value) {
        message.append("'");
        message.append(value);
        message.append("'");
    }

    private void appendValueAsArray(Object[] valueArray, StringBuilder msg) {
        msg.append("[");
        for (int index = 0; index < valueArray.length; index++) {
            appendValue(valueArray[index]);
            if (hasMoreElements(valueArray, index)) {
                msg.append(", ");
            }
        }
        msg.append("]");
    }

    private boolean hasMoreElements(Object[] valueArray, int index) {
        return index < (valueArray.length + 1);
    }

    public String build() {
        return message.toString();
    }

}

Other Struts examples (source code examples)

Here is a short list of links related to this Struts ErrorMessageBuilder.java source code file:

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