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package com.sun.enterprise.tools.common.validation.constraints;

import java.util.ArrayList;
import java.util.Collection;

import com.sun.enterprise.tools.common.validation.constraints.ConstraintFailure;
import com.sun.enterprise.tools.common.validation.util.BundleReader;

/**
 * ZeroToMaxIntegerConstraint  is a {@link Constraint} to validate numbers between
 * Zero to Integer.MAX_VALUE.
 * It implements <code>Constraint</code> interface and extends 
 * {@link ConstraintUtils} class. 
 * <code>match</code> method of this object returns empty 
 * <code>Collection</code> if the value being validated is a number between Zero
 * to Integer.MAX_VALUE; else it returns a <code>Collection</code> with a 
 * {@link ConstraintFailure} object in it. 
 * <code>ConstraintUtils</code> class provides utility methods for formating 
 * failure messages and a <code>print<method> method to print this object.
 *
 * @author  Rajeshwar Patil
 * @version %I%, %G%
 */
public class ZeroToMaxIntegerConstraint extends ConstraintUtils implements Constraint {
    
    /** Creates a new instance of <code>NumberConstraint</code>. */
    public ZeroToMaxIntegerConstraint() {
    }


    /**
     * Validates the given value against this <code>Constraint</code>.
     * 
     * @param value the value to be validated.
     * @param name the element name, value of which is being validated.
     * It is used only in case of <code>Constraint</code> failure, to construct
     * the failure message.
     *
     * @return <code>Collection</code> the Collection of
     * <code>ConstraintFailure</code> Objects. Collection is empty if 
     * there are no failures. This method will fail, if the given value
     * is not between Zero and Integer.MAX_VALUE.
     */
    public Collection match(String value, String name) {
        ArrayList failed_constrained_list = new ArrayList();
        if((value != null) && (value.length() != 0)){
            try {
                int intValue = Integer.parseInt(value);
                if((intValue < 0) || (intValue > Integer.MAX_VALUE)){
                    String failureMessage = formatFailureMessage(toString(),
                        value, name);
                    failed_constrained_list.add(new ConstraintFailure(toString(),
                        value, name, failureMessage, BundleReader.getValue(
                           "MSG_ZeroToMaxIntegerConstraint_Failure"))); //NOI18N
                }
                return failed_constrained_list;
            } catch(NumberFormatException e) {
                String failureMessage = formatFailureMessage(toString(), value,
                    name);
                failed_constrained_list.add(new ConstraintFailure(toString(),
                    value, name, failureMessage, BundleReader.getValue(
                        "MSG_NumberConstraint_Failure")));              //NOI18N
            }
        }
        return failed_constrained_list;
    }
}
