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1
13 package info.magnolia.cms.taglibs;
14
15 import info.magnolia.cms.core.Content;
16 import info.magnolia.cms.core.ContentHandler;
17 import info.magnolia.cms.core.ItemType;
18 import info.magnolia.cms.util.Resource;
19
20 import java.util.Collection  ;
21 import java.util.Iterator ;
22
23 import javax.jcr.RepositoryException;
24 import javax.servlet.http.HttpServletRequest ;
25 import javax.servlet.jsp.PageContext ;
26 import javax.servlet.jsp.tagext.TagSupport ;
27
28 import org.apache.log4j.Logger;
29
30
31
36 public class ContentNodeIterator extends TagSupport {
37
38 public static final String CONTENT_NODE_COLLECTION_NAME = "contentNodeCollectionName";
40 protected static final String CURRENT_INDEX = "currentIndex";
42 protected static final String SIZE = "size";
44
47 private static final long serialVersionUID = 222L;
48
49
52 private static Logger log = Logger.getLogger(ContentNodeIterator.class);
53
54 private String contentNodeCollectionName;
55
56 private int beginIndex;
57
58 private int endIndex;
59
60 private int step = 1;
61
62 private int size;
63
64 private int currentIndex;
65
66 private Iterator contentNodeIterator;
67
68
72 public void setContainerListName(String name) {
73 this.setContentNodeCollectionName(name);
74 }
75
76
79 public void setContentNodeCollectionName(String name) {
80 this.contentNodeCollectionName = name;
81 }
82
83
86 public void setBegin(String index) {
87 this.beginIndex = (new Integer (index)).intValue();
88 }
89
90
93 public void setEnd(String index) {
94 this.endIndex = (new Integer (index)).intValue();
95 }
96
97
100 public void setStep(String step) {
101 this.step = (new Integer (step)).intValue();
102 }
103
104
107 private int getEnd() {
108 if (this.endIndex == 0) {
109 return this.size;
110 }
111 return this.endIndex;
112 }
113
114
117 public int doStartTag() {
118 HttpServletRequest request = (HttpServletRequest ) pageContext.getRequest();
119 Content page = Resource.getCurrentActivePage(request);
120 try {
121 Collection children = page.getContent(this.contentNodeCollectionName).getChildren(
122 ItemType.CONTENTNODE,
123 ContentHandler.SORT_BY_SEQUENCE);
124 this.size = children.size();
125 if (this.size == 0) {
126 return SKIP_BODY;
127 }
128 pageContext.setAttribute(ContentNodeIterator.SIZE, new Integer (this.getEnd()), PageContext.REQUEST_SCOPE);
129 pageContext.setAttribute(
130 ContentNodeIterator.CURRENT_INDEX,
131 new Integer (this.currentIndex),
132 PageContext.REQUEST_SCOPE);
133 pageContext.setAttribute(
134 ContentNodeIterator.CONTENT_NODE_COLLECTION_NAME,
135 this.contentNodeCollectionName,
136 PageContext.REQUEST_SCOPE);
137 this.contentNodeIterator = children.iterator();
138 Resource.setLocalContentNodeCollectionName(request, this.contentNodeCollectionName);
139 for (; this.beginIndex > -1; --this.beginIndex) {
140 Resource.setLocalContentNode(request, (Content) this.contentNodeIterator.next());
141 }
142 }
143 catch (RepositoryException re) {
144 log.debug(re.getMessage());
145 return SKIP_BODY;
146 }
147 return EVAL_BODY_INCLUDE;
148 }
149
150
153 public int doAfterBody() {
154 HttpServletRequest request = (HttpServletRequest ) pageContext.getRequest();
155 if (this.contentNodeIterator.hasNext() && (this.currentIndex < this.getEnd())) {
156 this.currentIndex++;
157 pageContext.setAttribute(
158 ContentNodeIterator.CURRENT_INDEX,
159 new Integer (this.currentIndex),
160 PageContext.REQUEST_SCOPE);
161 for (int i = 0; i < this.step; i++) {
162 Resource.setLocalContentNode(request, (Content) this.contentNodeIterator.next());
163 }
164 return EVAL_BODY_AGAIN;
165 }
166 return SKIP_BODY;
167 }
168
169
172 public int doEndTag() {
173 HttpServletRequest request = (HttpServletRequest ) pageContext.getRequest();
174 Resource.removeLocalContentNode(request);
175 Resource.removeLocalContentNodeCollectionName(request);
176 pageContext.removeAttribute(ContentNodeIterator.CURRENT_INDEX);
177 pageContext.removeAttribute(ContentNodeIterator.SIZE);
178 pageContext.removeAttribute(ContentNodeIterator.CONTENT_NODE_COLLECTION_NAME);
179 this.beginIndex = 0;
180 this.endIndex = 0;
181 this.step = 1;
182 this.size = 0;
183 this.currentIndex = 0;
184 return EVAL_PAGE;
185 }
186
187
190 public void release() {
191 this.contentNodeCollectionName = null;
192 this.contentNodeIterator = null;
193 this.beginIndex = 0;
194 this.endIndex = 0;
195 this.step = 1;
196 this.size = 0;
197 this.currentIndex = 0;
198 super.release();
199 }
200
201 }
202 |
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