001/**
002 * Copyright 2005-2015 The Kuali Foundation
003 *
004 * Licensed under the Educational Community License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.opensource.org/licenses/ecl2.php
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.kuali.rice.krad.datadictionary.validation.constraint;
017
018import org.kuali.rice.krad.datadictionary.parse.BeanTag;
019import org.kuali.rice.krad.datadictionary.parse.BeanTagAttribute;
020import org.kuali.rice.krad.datadictionary.validator.ValidationTrace;
021import org.kuali.rice.krad.messages.MessageService;
022import org.kuali.rice.krad.service.KRADServiceLocatorWeb;
023import org.kuali.rice.krad.uif.UifConstants;
024
025import java.util.ArrayList;
026import java.util.List;
027
028/**
029 * Validation pattern for matching fixed point numbers, optionally matching negative numbers
030 *
031 * <p>
032 * Only allows a numeric value where the precision property represents the maximum number of
033 * total numbers allowed, and scale represents the minimum numbers after the decimal point.
034 * The decimal places are implied to be 0 if not included and still count towards total
035 * numbers allowed.
036 * </p>
037 *
038 * @author Kuali Rice Team (rice.collab@kuali.org)
039 */
040@BeanTag(name = "fixedPointPatternConstraint", parent = "FixedPointPatternConstraint")
041public class FixedPointPatternConstraint extends ValidDataPatternConstraint {
042
043    protected boolean allowNegative;
044    protected int precision;
045    protected int scale;
046
047    /**
048     * Overriding retrieval of
049     *
050     * @see org.kuali.rice.krad.datadictionary.validation.constraint.ValidCharactersPatternConstraint#getRegexString()
051     */
052    @Override
053    protected String getRegexString() {
054        StringBuilder regex = new StringBuilder();
055
056        if (getPrecision() < 0 || getScale() < 0 || getPrecision() - getScale() < 0){
057            throw new RuntimeException("Precision and scale cannot be negative AND scale cannot be greater than "
058                    + "precision for FixedPointPatternConstraints!");
059        }
060
061        if (isAllowNegative()) {
062            regex.append("-?");
063        }
064        // final pattern will be: -?([0-9]{0,p-s}\.[0-9]{1,s}|[0-9]{1,p-s}) where p = precision, s=scale
065
066        regex.append("(");
067        if(getPrecision() - getScale() > 0){
068            regex.append("[0-9]{0," + (getPrecision() - getScale()) + "}");
069        }
070        regex.append("\\.");
071        regex.append("[0-9]{1," + getScale() + "}");
072        if(getPrecision() - getScale() > 0){
073            regex.append("|[0-9]{1," + (getPrecision() - getScale()) + "}");
074        }
075        regex.append(")");
076        return regex.toString();
077    }
078
079    /**
080     * @return the allowNegative
081     */
082    @BeanTagAttribute(name = "allowNegative")
083    public boolean isAllowNegative() {
084        return this.allowNegative;
085    }
086
087    /**
088     * @param allowNegative the allowNegative to set
089     */
090    public void setAllowNegative(boolean allowNegative) {
091        this.allowNegative = allowNegative;
092    }
093
094    /**
095     * @return the precision
096     */
097    @BeanTagAttribute(name = "precision")
098    public int getPrecision() {
099        return this.precision;
100    }
101
102    /**
103     * @param precision the precision to set
104     */
105    public void setPrecision(int precision) {
106        this.precision = precision;
107    }
108
109    /**
110     * @return the scale
111     */
112    @BeanTagAttribute(name = "scale")
113    public int getScale() {
114        return this.scale;
115    }
116
117    /**
118     * @param scale the scale to set
119     */
120    public void setScale(int scale) {
121        this.scale = scale;
122    }
123
124    /**
125     * This overridden method ...
126     *
127     * @see org.kuali.rice.krad.datadictionary.validation.constraint.ValidDataPatternConstraint#getValidationMessageParams()
128     */
129    @Override
130    public List<String> getValidationMessageParams() {
131        if (validationMessageParams == null) {
132            validationMessageParams = new ArrayList<String>();
133            MessageService messageService = KRADServiceLocatorWeb.getMessageService();
134            if (allowNegative) {
135                validationMessageParams.add(messageService.getMessageText(
136                        UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "positiveOrNegative"));
137            } else {
138                validationMessageParams.add(messageService.getMessageText(
139                        UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "positiveOrZero"));
140            }
141
142            validationMessageParams.add(Integer.toString(precision));
143            validationMessageParams.add(Integer.toString(scale));
144        }
145        return validationMessageParams;
146    }
147
148    /**
149     * Validates different requirements of component compiling a series of reports detailing information on errors
150     * found in the component.  Used by the RiceDictionaryValidator.
151     *
152     * @param tracer Record of component's location
153     */
154    @Override
155    public void completeValidation(ValidationTrace tracer) {
156        tracer.addBean("FixedPointPatternConstraint", getMessageKey());
157
158        if (getPrecision() <= getScale()) {
159            String currentValues[] = {"precision =" + getPrecision(), "scale = " + getScale()};
160            tracer.createError("Precision should greater than Scale", currentValues);
161        }
162
163        super.completeValidation(tracer.getCopy());
164    }
165
166}