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1
16 package com.blandware.atleap.webapp.taglib.core.grid;
17
18 import org.apache.commons.logging.Log;
19 import org.apache.commons.logging.LogFactory;
20
21 import javax.servlet.jsp.JspException  ;
22 import javax.servlet.jsp.JspTagException ;
23 import javax.servlet.jsp.PageContext ;
24 import javax.servlet.jsp.tagext.JspFragment ;
25 import javax.servlet.jsp.tagext.SimpleTagSupport ;
26 import java.io.IOException ;
27
28
73 public class PagerTag extends SimpleTagSupport {
74
75 protected transient final Log log = LogFactory.getLog(PagerTag.class);
76
77
80 protected Integer pageCount = null;
81
82
85 protected Integer lastPageNumber = null;
86
87
96 public Integer getPageCount() {
97 return pageCount;
98 }
99
100
105 public void setPageCount(Integer pageCount) {
106 this.pageCount = pageCount;
107 }
108
109
114 protected Integer getLastPageNumber() {
115 return this.lastPageNumber;
116 }
117
118
124 public void doTag() throws JspException , IOException {
125
126 PageContext pageContext = (PageContext ) getJspContext();
127
128 GridTag parentGridTag = (GridTag) findAncestorWithClass(this, GridTag.class);
130
131 if ( parentGridTag == null ) {
132 JspTagException e = new JspTagException ("Parent tag is invalid! This tag is only valid when nested within 'grid' tag");
133 throw e;
134 }
135
136
138 if ( pageCount == null ) {
139 pageCount = new Integer (10);
140 }
141
142 int total = parentGridTag.getGrid().getTotal().intValue();
143 int pageSize = parentGridTag.getPageSize().intValue();
144 if (pageSize <= 0) {
145 throw new IllegalArgumentException ("Page size must be positive");
146 }
147
148 if ( total > pageSize ) {
149
150 int last = total / pageSize;
151 if ( total % pageSize > 0 ) {
152 last += 1;
153 }
154
155 if ( last <= 1 ) {
156 last = 1;
157 }
158
159 lastPageNumber = new Integer (last);
160
161 JspFragment body = getJspBody();
162 if ( body != null ) {
163 body.invoke(null);
164 }
165 }
166 }
167
168 }
169 |
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