Source Code Cross Referenced for CustomBooleanEditor.java in  » J2EE » spring-framework-2.0.6 » org » springframework » beans » propertyeditors » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.beans.propertyeditors 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2002-2007 the original author or authors.
003:         *
004:         * Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
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:         */
016:
017:        package org.springframework.beans.propertyeditors;
018:
019:        import java.beans.PropertyEditorSupport;
020:
021:        import org.springframework.util.StringUtils;
022:
023:        /**
024:         * Property editor for Boolean/boolean properties.
025:         *
026:         * <p>This is not meant to be used as system PropertyEditor but rather as
027:         * locale-specific Boolean editor within custom controller code, to parse
028:         * UI-caused boolean strings into boolean properties of beans and check
029:         * them in the UI form.
030:         *
031:         * <p>In web MVC code, this editor will typically be registered with
032:         * <code>binder.registerCustomEditor</code> calls in an implementation
033:         * of BaseCommandController's <code>initBinder</code> method.
034:         *
035:         * @author Juergen Hoeller
036:         * @since 10.06.2003
037:         * @see org.springframework.validation.DataBinder#registerCustomEditor
038:         * @see org.springframework.web.servlet.mvc.BaseCommandController#initBinder
039:         */
040:        public class CustomBooleanEditor extends PropertyEditorSupport {
041:
042:            public static final String VALUE_TRUE = "true";
043:            public static final String VALUE_FALSE = "false";
044:
045:            public static final String VALUE_ON = "on";
046:            public static final String VALUE_OFF = "off";
047:
048:            public static final String VALUE_YES = "yes";
049:            public static final String VALUE_NO = "no";
050:
051:            public static final String VALUE_1 = "1";
052:            public static final String VALUE_0 = "0";
053:
054:            private final String trueString;
055:
056:            private final String falseString;
057:
058:            private final boolean allowEmpty;
059:
060:            /**
061:             * Create a new CustomBooleanEditor instance, with "true"/"on"/"yes"
062:             * and "false"/"off"/"no" as recognized String values.
063:             * <p>The "allowEmpty" parameter states if an empty String should
064:             * be allowed for parsing, i.e. get interpreted as null value.
065:             * Else, an IllegalArgumentException gets thrown in that case.
066:             * @param allowEmpty if empty strings should be allowed
067:             */
068:            public CustomBooleanEditor(boolean allowEmpty) {
069:                this (null, null, allowEmpty);
070:            }
071:
072:            /**
073:             * Create a new CustomBooleanEditor instance,
074:             * with configurable String values for true and false.
075:             * <p>The "allowEmpty" parameter states if an empty String should
076:             * be allowed for parsing, i.e. get interpreted as null value.
077:             * Else, an IllegalArgumentException gets thrown in that case.
078:             * @param trueString the String value that represents true:
079:             * for example, "true" (VALUE_TRUE), "on" (VALUE_ON),
080:             * "yes" (VALUE_YES) or some custom value
081:             * @param falseString the String value that represents false:
082:             * for example, "false" (VALUE_FALSE), "off" (VALUE_OFF),
083:             * "no" (VALUE_NO) or some custom value
084:             * @param allowEmpty if empty strings should be allowed
085:             * @see #VALUE_TRUE
086:             * @see #VALUE_FALSE
087:             * @see #VALUE_ON
088:             * @see #VALUE_OFF
089:             * @see #VALUE_YES
090:             * @see #VALUE_NO
091:             */
092:            public CustomBooleanEditor(String trueString, String falseString,
093:                    boolean allowEmpty) {
094:                this .trueString = trueString;
095:                this .falseString = falseString;
096:                this .allowEmpty = allowEmpty;
097:            }
098:
099:            public void setAsText(String text) throws IllegalArgumentException {
100:                String input = (text != null ? text.trim() : null);
101:                if (this .allowEmpty && !StringUtils.hasLength(input)) {
102:                    // Treat empty String as null value.
103:                    setValue(null);
104:                } else if (this .trueString != null
105:                        && input.equalsIgnoreCase(this .trueString)) {
106:                    setValue(Boolean.TRUE);
107:                } else if (this .falseString != null
108:                        && input.equalsIgnoreCase(this .falseString)) {
109:                    setValue(Boolean.FALSE);
110:                } else if (this .trueString == null
111:                        && (input.equalsIgnoreCase(VALUE_TRUE)
112:                                || input.equalsIgnoreCase(VALUE_ON)
113:                                || input.equalsIgnoreCase(VALUE_YES) || input
114:                                .equals(VALUE_1))) {
115:                    setValue(Boolean.TRUE);
116:                } else if (this .falseString == null
117:                        && (input.equalsIgnoreCase(VALUE_FALSE)
118:                                || input.equalsIgnoreCase(VALUE_OFF)
119:                                || input.equalsIgnoreCase(VALUE_NO) || input
120:                                .equals(VALUE_0))) {
121:                    setValue(Boolean.FALSE);
122:                } else {
123:                    throw new IllegalArgumentException(
124:                            "Invalid boolean value [" + text + "]");
125:                }
126:            }
127:
128:            public String getAsText() {
129:                if (Boolean.TRUE.equals(getValue())) {
130:                    return (this .trueString != null ? this .trueString
131:                            : VALUE_TRUE);
132:                } else if (Boolean.FALSE.equals(getValue())) {
133:                    return (this .falseString != null ? this .falseString
134:                            : VALUE_FALSE);
135:                } else {
136:                    return "";
137:                }
138:            }
139:
140:        }
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