enterprise/j2ee.sun.ddui/src/org/netbeans/modules/j2ee/sun/validation/constraints/InConstraint.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.netbeans.modules.j2ee.sun.validation.constraints;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.text.MessageFormat;

import org.netbeans.modules.j2ee.sun.validation.constraints.ConstraintFailure;
import org.netbeans.modules.j2ee.sun.validation.util.BundleReader;


/**
 * InConstraint  is a {@link Constraint} to validate an Enumeration 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 belongs to the 
 * enumeration represented by this object; 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 InConstraint extends ConstraintUtils implements Constraint {

    /**
     * An enumeration represented by this <code>Constraint</code>.
     */
    private Collection enumeration = null;


    /** Creates a new instance of <code>InConstraint</code>. */
    public InConstraint() {
        enumeration = new ArrayList();
    }


    /** Creates a new instance of <code>InConstraint</code>. */
    public InConstraint(Collection enumeration) {
        this.enumeration = enumeration;
    }


    /** Creates a new instance of <code>InConstraint</code>. */
    public InConstraint(String[] enumeration) {
        this.enumeration = new ArrayList();
        int size = enumeration.length;
        for(int i=0; i<size; i++) {
            this.enumeration.add(enumeration[i]);
        }
    }


    /**
     * 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, only for the values
     * that does not belong to an enumeration represented by this object.
     */
    public java.util.Collection match(String value, String name) {
        Collection failed_constrained_list = new ArrayList();
        if((value != null) && (value.length() != 0)) {
            if(!enumeration.contains(value)){
                String failureMessage = formatFailureMessage(toString(),
                    value, name);

                String format = BundleReader.getValue(
                    "MSG_InConstraint_Failure");                        //NOI18N
                StringBuilder setBuilder = new StringBuilder(128);
                Iterator iterator = enumeration.iterator();
                while(iterator.hasNext()){
                    setBuilder.append(' '); // NOI18N
                    setBuilder.append((String) iterator.next());
                }

                Object[] arguments = new Object[]{setBuilder.toString()};

                String genericFailureMessage = 
                    MessageFormat.format(format, arguments);

                failed_constrained_list.add(new ConstraintFailure(toString(),
                    value, name, failureMessage, genericFailureMessage));
            }
        }
        return failed_constrained_list;
    }


    /**
     * Sets the given <code>Collection</code> as the enumeration
     * represented by this object.
     * 
     * @param enumeration the <code>Collection</code> to be set
     * as the enumeration represented by this object.
     */
    public void setEnumerationValue(Collection enumeration){
        this.enumeration = enumeration;
    }


    /**
     * Adds the given <code>value</code> to the enumeration
     * represented by this object.
     * 
     * @param value the value to be added to the enumeration
     * represented by this object.
     */
    public void setEnumerationValue(String value){
        enumeration.add(value);
    }


    /**
     * Prints this <code>Constraint</code>.
     */
    void print() {
        super.print();
        String format = BundleReader.getValue("Name_Value_Pair_Format");//NOI18N
        Iterator iterator = enumeration.iterator();
        String values = null;
        if(iterator.hasNext()) {
            StringBuilder valuesBuilder = new StringBuilder(128);
            while(iterator.hasNext()){
                valuesBuilder.append("  "); // NOI18N
                valuesBuilder.append((String) iterator.next());
            }
            values = valuesBuilder.toString();
        }

        if(values != null){
            Object[] arguments = 
                new Object[]{"Enumeration Values", values};             //NOI18N
            System.out.println(MessageFormat.format(format, arguments));
        }
    }
}