| Line | Hits | Source |
|---|---|---|
| 1 | /* | |
| 2 | Chrysalis Web Framework [http://chrysalis.sourceforge.net] | |
| 3 | Copyright (c) 2002, 2003, 2004, Paul Strack | |
| 4 | ||
| 5 | All rights reserved. | |
| 6 | ||
| 7 | Redistribution and use in source and binary forms, with or without | |
| 8 | modification, are permitted provided that the following conditions are met: | |
| 9 | ||
| 10 | 1. Redistributions of source code must retain the above copyright notice, this | |
| 11 | list of conditions and the following disclaimer. | |
| 12 | ||
| 13 | 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 14 | this list of conditions and the following disclaimer in the documentation | |
| 15 | and/or other materials provided with the distribution. | |
| 16 | ||
| 17 | 3. Neither the name of the copyright holder nor the names of its contributors | |
| 18 | may be used to endorse or promote products derived from this software without | |
| 19 | specific prior written permission. | |
| 20 | ||
| 21 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
| 22 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 23 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 24 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | |
| 25 | ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 26 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 27 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
| 28 | ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 29 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 30 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 31 | */ | |
| 32 | ||
| 33 | package org.chwf.taglib.jutil; | |
| 34 | ||
| 35 | import javax.servlet.ServletRequest; | |
| 36 | import javax.servlet.jsp.JspException; | |
| 37 | ||
| 38 | import org.chwf.filter.BeanFilter; | |
| 39 | import org.chwf.taglib.base.LifeCycleBodyTagSupport; | |
| 40 | import org.chwf.taglib.base.ObjectTagSupport; | |
| 41 | import org.chwf.taglib.base.Parameterized; | |
| 42 | import org.chwf.taglib.base.TagException; | |
| 43 | ||
| 44 | /** | |
| 45 | * Tag handler for the <code><param></code> tag. It has one attribute, | |
| 46 | * "name", which is the name of the generated parameter. This handler | |
| 47 | * sets the parameter or attribute value in one of two ways: | |
| 48 | * | |
| 49 | * <ul> | |
| 50 | * <li>If the trimmed tag body is not an empty string, it sets the | |
| 51 | * value equal to the processed contents of the tag body.</li> | |
| 52 | * <li>Otherwise, it sets the parameter value to the first matching web | |
| 53 | * application variable, searching first request parameters, then | |
| 54 | * web application scopes in order (page to application).</li> | |
| 55 | * </ul> | |
| 56 | * | |
| 57 | * Once the parameter is set, the handler retrieves its parent tag. If the | |
| 58 | * parent tag implements the <code>Parameterized</code> interface, it | |
| 59 | * calls the tags <code>addParameter()</code> method. If not, it throws a | |
| 60 | * <code>JspException</code>. | |
| 61 | * | |
| 62 | * @author <a href="mailto:pfstrack@users.sourceforge.net">Paul Strack</a> | |
| 63 | */ | |
| 64 | 30 | public class ParamTag extends LifeCycleBodyTagSupport { |
| 65 | ||
| 66 | /** The parameter name. */ | |
| 67 | private String name; | |
| 68 | ||
| 69 | /** The object property. */ | |
| 70 | private String property; | |
| 71 | ||
| 72 | /** The object name (used for lookup). */ | |
| 73 | private String objectName; | |
| 74 | ||
| 75 | /** The object. */ | |
| 76 | private Object object; | |
| 77 | ||
| 78 | /** | |
| 79 | * Clean up data for tag handler reuse and pooling. Should be overridden in | |
| 80 | * tag handler. Subclasses should always invoke their superclass's cleanup | |
| 81 | * method: <code>super.cleanup()</code> | |
| 82 | */ | |
| 83 | public void cleanup() { | |
| 84 | 2 | super.cleanup(); |
| 85 | 2 | this.name = null; |
| 86 | 2 | this.property = null; |
| 87 | 2 | this.objectName = null; |
| 88 | 2 | this.object = null; |
| 89 | 2 | } |
| 90 | ||
| 91 | /** | |
| 92 | * The parameter name. | |
| 93 | * | |
| 94 | * @param name The parameter name. | |
| 95 | */ | |
| 96 | public void setName(String name) { | |
| 97 | 16 | this.name = name; |
| 98 | 16 | } |
| 99 | ||
| 100 | /** | |
| 101 | * The parameter name. | |
| 102 | * | |
| 103 | * @return The parameter name. | |
| 104 | */ | |
| 105 | public String getName() { | |
| 106 | 35 | if (this.name != null) { |
| 107 | 31 | return this.name; |
| 108 | } else { | |
| 109 | 4 | return this.property; |
| 110 | } | |
| 111 | } | |
| 112 | ||
| 113 | /** | |
| 114 | * The object property being retrieved. Defaults to var if absent. | |
| 115 | * | |
| 116 | * @param property The property name. | |
| 117 | * @throws JspException If the property cannot be initialized. | |
| 118 | */ | |
| 119 | public void setProperty(String property) throws JspException { | |
| 120 | 6 | this.property = property; |
| 121 | 6 | } |
| 122 | ||
| 123 | /** | |
| 124 | * The object property being retrieved. Defaults to var if absent. | |
| 125 | * | |
| 126 | * @return The property name. | |
| 127 | */ | |
| 128 | public String getProperty() { | |
| 129 | 4 | return this.property; |
| 130 | } | |
| 131 | ||
| 132 | /** | |
| 133 | * The object name. Always optional. The tag will use the default object if | |
| 134 | * no object can is specified. | |
| 135 | * | |
| 136 | * @param objectName The object's name for lookup. | |
| 137 | * @throws JspException If the object filter cannot be found. | |
| 138 | */ | |
| 139 | public void setObject(String objectName) throws JspException { | |
| 140 | 8 | this.objectName = objectName; |
| 141 | 8 | this.object = pageContext.findAttribute(objectName); |
| 142 | 8 | if (this.object == null) { |
| 143 | 0 | throw new TagException( |
| 144 | JutilMessages.MESSAGE_OBJECT_NOT_FOUND, | |
| 145 | new Object[] { objectName }); | |
| 146 | } | |
| 147 | 8 | } |
| 148 | ||
| 149 | /** | |
| 150 | * Get object name used to lookup the object. | |
| 151 | * | |
| 152 | * @return The object name. | |
| 153 | */ | |
| 154 | public String getObject() { | |
| 155 | 4 | return this.objectName; |
| 156 | } | |
| 157 | ||
| 158 | /** | |
| 159 | * Find the object for the tag or the default object if no object was | |
| 160 | * specified. | |
| 161 | * | |
| 162 | * @return The object. | |
| 163 | */ | |
| 164 | public Object findObject() { | |
| 165 | 6 | if (this.object == null) { |
| 166 | 2 | this.object = pageContext.findAttribute(ObjectTagSupport.DEFAULT_OBJECT); |
| 167 | } | |
| 168 | 6 | return this.object; |
| 169 | } | |
| 170 | ||
| 171 | /** | |
| 172 | * Set parameter value from tag body or scoped variable. | |
| 173 | * | |
| 174 | * @return SKIP_BODY | |
| 175 | * @throws JspException If not nested in a parametrized tag. | |
| 176 | */ | |
| 177 | public int doEnd() throws JspException { | |
| 178 | 14 | String value = null; |
| 179 | 14 | value = getValueFromBodyContent(); |
| 180 | 14 | if (value == null || value.equals("")) { |
| 181 | 12 | value = findValue(); |
| 182 | } | |
| 183 | try { | |
| 184 | 12 | Parameterized parent = getParametrizedTag(); |
| 185 | 11 | parent.addParameter(getName(), value); |
| 186 | 8 | } catch (ClassCastException ex) { |
| 187 | 1 | throw new TagException(JutilMessages.MESSAGE_PARENT_NOT_PARAMETRIZED); |
| 188 | } catch (NullPointerException ex) { | |
| 189 | 3 | throw new TagException(JutilMessages.MESSAGE_NO_PARENT); |
| 190 | } | |
| 191 | 8 | return EVAL_PAGE; |
| 192 | } | |
| 193 | ||
| 194 | /** | |
| 195 | * Derive value from body content. | |
| 196 | * | |
| 197 | * @return Null if there is no content. | |
| 198 | */ | |
| 199 | private String getValueFromBodyContent() { | |
| 200 | 14 | String value = null; |
| 201 | 14 | if (bodyContent != null) { |
| 202 | 14 | value = bodyContent.getString(); |
| 203 | } | |
| 204 | 14 | if (value != null) { |
| 205 | 14 | value = value.trim(); |
| 206 | } | |
| 207 | 14 | return value; |
| 208 | } | |
| 209 | ||
| 210 | /** | |
| 211 | * Find param value if tag body is empty. | |
| 212 | * | |
| 213 | * @return The parameter value. | |
| 214 | * @throws JspException If the value is not found. | |
| 215 | */ | |
| 216 | private String findValue() throws JspException { | |
| 217 | 12 | if (this.property != null) { |
| 218 | 2 | Object object = findObject(); |
| 219 | 2 | return String.valueOf(BeanFilter.getProperty(object, this.property)); |
| 220 | } | |
| 221 | ||
| 222 | 10 | ServletRequest request = pageContext.getRequest(); |
| 223 | 10 | String value = request.getParameter(getName()); |
| 224 | 10 | if (value != null) { |
| 225 | 2 | return value; |
| 226 | } | |
| 227 | 8 | Object result = pageContext.findAttribute(getName()); |
| 228 | 8 | if (result == null) { |
| 229 | 2 | throw new TagException( |
| 230 | JutilMessages.MESSAGE_PARAMETER_VALUE_NOT_FOUND, | |
| 231 | new Object[] { getName()}); | |
| 232 | } | |
| 233 | 6 | return result.toString(); |
| 234 | } | |
| 235 | ||
| 236 | /** | |
| 237 | * Derived parametrized tag to be updated. | |
| 238 | * | |
| 239 | * @return The parametrized tag. | |
| 240 | */ | |
| 241 | protected Parameterized getParametrizedTag() { | |
| 242 | 6 | return (Parameterized) getParent(); |
| 243 | } | |
| 244 | } |
|
this report was generated by version 1.0.5 of jcoverage. |
copyright © 2003, jcoverage ltd. all rights reserved. |