Source Code Cross Referenced for DataInfo.java in  » Template-Engine » Velocity » org » apache » velocity » tools » view » Java Source Code / Java DocumentationJava Source Code and Java Documentation

001:        package org.apache.velocity.tools.view;
002:
003:        /*
004:         * Licensed to the Apache Software Foundation (ASF) under one
005:         * or more contributor license agreements.  See the NOTICE file
006:         * distributed with this work for additional information
007:         * regarding copyright ownership.  The ASF licenses this file
008:         * to you under the Apache License, Version 2.0 (the
009:         * "License"); you may not use this file except in compliance
010:         * with the License.  You may obtain a copy of the License at
011:         *
012:         *   http://www.apache.org/licenses/LICENSE-2.0
013:         *
014:         * Unless required by applicable law or agreed to in writing,
015:         * software distributed under the License is distributed on an
016:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017:         * KIND, either express or implied.  See the License for the
018:         * specific language governing permissions and limitations
019:         * under the License.
020:         */
021:
022:        /**
023:         * <p>ToolInfo implementation to handle "primitive" data types.
024:         * It currently supports String, Number, and Boolean data.</p>
025:         *
026:         * <p>An example of data elements specified in your toolbox.xml
027:         * might be:
028:         * <pre>
029:         *  &lt;data type="string"&gt;
030:         *    &lt;key&gt;app_name&lt;/key&gt;
031:         *    &lt;value&gt;FooWeb Deluxe&lt;/value&gt;
032:         *  &lt;/data&gt;
033:         *  &lt;data type="number"&gt;
034:         *    &lt;key&gt;app_version&lt;/key&gt;
035:         *    &lt;value&gt;4.2&lt;/value&gt;
036:         *  &lt;/data&gt;
037:         *  &lt;data type="boolean"&gt;
038:         *    &lt;key&gt;debug&lt;/key&gt;
039:         *    &lt;value&gt;true&lt;/value&gt;
040:         *  &lt;/data&gt;
041:         *  &lt;data type="number"&gt;
042:         *    &lt;key&gt;screen_width&lt;/key&gt;
043:         *    &lt;value&gt;400&lt;/value&gt;
044:         *  &lt;/data&gt;
045:         * </pre></p>
046:         *
047:         * @author Nathan Bubna
048:         *
049:         * @version $Id: DataInfo.java 479724 2006-11-27 18:49:37Z nbubna $
050:         */
051:        public class DataInfo implements  ToolInfo {
052:
053:            public static final String TYPE_STRING = "string";
054:            public static final String TYPE_NUMBER = "number";
055:            public static final String TYPE_BOOLEAN = "boolean";
056:
057:            private static final int TYPE_ID_STRING = 0;
058:            private static final int TYPE_ID_NUMBER = 1;
059:            private static final int TYPE_ID_BOOLEAN = 2;
060:
061:            private String key = null;
062:            private int type_id = TYPE_ID_STRING;
063:            private Object data = null;
064:
065:            public DataInfo() {
066:            }
067:
068:            /***********************  Mutators *************************/
069:
070:            public void setKey(String key) {
071:                this .key = key;
072:            }
073:
074:            public void setType(String type) {
075:                if (TYPE_BOOLEAN.equalsIgnoreCase(type)) {
076:                    this .type_id = TYPE_ID_BOOLEAN;
077:                } else if (TYPE_NUMBER.equalsIgnoreCase(type)) {
078:                    this .type_id = TYPE_ID_NUMBER;
079:                } else /* if no type or type="string" */
080:                {
081:                    this .type_id = TYPE_ID_STRING;
082:                }
083:            }
084:
085:            public void setValue(String value) {
086:                if (type_id == TYPE_ID_BOOLEAN) {
087:                    this .data = Boolean.valueOf(value);
088:                } else if (type_id == TYPE_ID_NUMBER) {
089:                    if (value.indexOf('.') >= 0) {
090:                        this .data = new Double(value);
091:                    } else {
092:                        this .data = new Integer(value);
093:                    }
094:                } else /* type is "string" */
095:                {
096:                    this .data = value;
097:                }
098:            }
099:
100:            /***********************  Accessors *************************/
101:
102:            public String getKey() {
103:                return key;
104:            }
105:
106:            public String getClassname() {
107:                return data != null ? data.getClass().getName() : null;
108:            }
109:
110:            /**
111:             * Returns the data. Always returns the same
112:             * object since the data is a constant. Initialization
113:             * data is ignored.
114:             */
115:            public Object getInstance(Object initData) {
116:                return data;
117:            }
118:
119:        }