1
22
23 package com.liferay.portlet.documentlibrary.action;
24
25 import com.liferay.portal.kernel.security.permission.ActionKeys;
26 import com.liferay.portal.kernel.util.ParamUtil;
27 import com.liferay.portal.kernel.util.StringPool;
28 import com.liferay.portal.security.auth.PrincipalException;
29 import com.liferay.portal.struts.PortletAction;
30 import com.liferay.portal.theme.ThemeDisplay;
31 import com.liferay.portal.util.WebKeys;
32 import com.liferay.portlet.documentlibrary.NoSuchFileEntryException;
33 import com.liferay.portlet.documentlibrary.service.DLFileEntryLocalServiceUtil;
34 import com.liferay.portlet.documentlibrary.service.permission.DLFileEntryPermission;
35 import com.liferay.util.diff.DiffUtil;
36 import com.liferay.util.servlet.SessionErrors;
37
38 import java.io.InputStream;
39 import java.io.InputStreamReader;
40
41 import java.util.List;
42
43 import javax.portlet.ActionRequest;
44 import javax.portlet.ActionResponse;
45 import javax.portlet.PortletConfig;
46 import javax.portlet.RenderRequest;
47 import javax.portlet.RenderResponse;
48
49 import org.apache.struts.action.ActionForm;
50 import org.apache.struts.action.ActionForward;
51 import org.apache.struts.action.ActionMapping;
52
53
59 public class CompareVersionsAction extends PortletAction {
60
61 public void processAction(
62 ActionMapping mapping, ActionForm form, PortletConfig config,
63 ActionRequest req, ActionResponse res)
64 throws Exception {
65
66 try {
67 compareVersions(req);
68 }
69 catch (Exception e) {
70 if (e instanceof NoSuchFileEntryException ||
71 e instanceof PrincipalException) {
72
73 SessionErrors.add(req, e.getClass().getName());
74
75 setForward(req, "portlet.document_library.error");
76 }
77 else {
78 throw e;
79 }
80 }
81 }
82
83 public ActionForward render(
84 ActionMapping mapping, ActionForm form, PortletConfig config,
85 RenderRequest req, RenderResponse res)
86 throws Exception {
87
88 return mapping.findForward("portlet.document_library.compare_versions");
89 }
90
91 protected void compareVersions(ActionRequest req) throws Exception {
92 ThemeDisplay themeDisplay =
93 (ThemeDisplay)req.getAttribute(WebKeys.THEME_DISPLAY);
94
95 long companyId = themeDisplay.getCompanyId();
96 long userId = themeDisplay.getUserId();
97
98 long folderId = ParamUtil.getLong(req, "folderId");
99 String name = ParamUtil.getString(req, "name");
100
101 DLFileEntryPermission.check(
102 themeDisplay.getPermissionChecker(), folderId, name,
103 ActionKeys.VIEW);
104
105 String titleWithExtension = ParamUtil.getString(
106 req, "titleWithExtension");
107
108 double sourceVersion = ParamUtil.getDouble(req, "sourceVersion");
109 double targetVersion = ParamUtil.getDouble(req, "targetVersion");
110
111 InputStream sourceIs = DLFileEntryLocalServiceUtil.getFileAsStream(
112 companyId, userId, folderId, name, sourceVersion);
113 InputStream targetIs = DLFileEntryLocalServiceUtil.getFileAsStream(
114 companyId, userId, folderId, name, targetVersion);
115
116 List[] diffResults = DiffUtil.diff(
117 new InputStreamReader(sourceIs), new InputStreamReader(targetIs));
118
119 req.setAttribute(
120 WebKeys.SOURCE_NAME,
121 titleWithExtension + StringPool.SPACE + sourceVersion);
122 req.setAttribute(
123 WebKeys.TARGET_NAME,
124 titleWithExtension + StringPool.SPACE + targetVersion);
125 req.setAttribute(WebKeys.DIFF_RESULTS, diffResults);
126 }
127
128 }