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package org.kuali.rice.kew.rule.xmlrouting; |
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import java.util.Iterator; |
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import java.util.List; |
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import javax.xml.namespace.QName; |
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import javax.xml.xpath.XPath; |
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import javax.xml.xpath.XPathFunction; |
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import javax.xml.xpath.XPathFunctionResolver; |
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import org.apache.commons.lang.StringUtils; |
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import org.kuali.rice.kew.exception.WorkflowRuntimeException; |
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import org.kuali.rice.kew.rule.RuleExtension; |
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import org.kuali.rice.kew.rule.RuleExtensionValue; |
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import org.kuali.rice.kew.xml.xstream.XStreamSafeSearchFunction; |
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import org.w3c.dom.Node; |
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40 | 0 | public class WorkflowFunctionResolver implements XPathFunctionResolver { |
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private List<RuleExtension> ruleExtensions; |
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private Node rootNode; |
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private XPath xpath; |
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public XPathFunction resolveFunction(QName fname, int arity) { |
48 | 0 | if (fname == null) { |
49 | 0 | throw new NullPointerException("The function name cannot be null."); |
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} |
51 | 0 | if (fname.equals(new QName("http://nothingfornowwf.com", "ruledata", "wf"))) { |
52 | 0 | if (ruleExtensions == null) { |
53 | 0 | throw new IllegalArgumentException("There are no rule extensions."); |
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} |
55 | 0 | return new XPathFunction() { |
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public Object evaluate(List args) { |
57 | 0 | if (args.size() == 1) { |
58 | 0 | String name = (String) args.get(0); |
59 | 0 | for (RuleExtension ruleExtension : ruleExtensions) { |
60 | 0 | for (Iterator iter = ruleExtension.getExtensionValues().iterator(); iter.hasNext();) { |
61 | 0 | RuleExtensionValue value = (RuleExtensionValue) iter.next(); |
62 | 0 | if (value.getKey().equals(name)) { |
63 | 0 | return value.getValue(); |
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} |
65 | 0 | } |
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} |
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} |
68 | 0 | return ""; |
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} |
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}; |
71 | 0 | } else if (fname.equals(new QName("http://nothingfornowwf.com", "xstreamsafe", "wf"))) { |
72 | 0 | return new XStreamSafeSearchFunction(rootNode, this.getXpath()); |
73 | 0 | } else if (fname.equals(new QName("http://nothingfornowwf.com", "upper-case", "wf"))) { |
74 | 0 | return new UpperCaseFunction(); |
75 | 0 | } else if (fname.equals(new QName("http://nothingfornowwf.com", "field", "wf"))) { |
76 | 0 | return new XPathFunction() { |
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public Object evaluate(java.util.List args) { |
78 | 0 | if (args.size() == 1) { |
79 | 0 | String name = (String) args.get(0); |
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try { |
81 | 0 | return field(name); |
82 | 0 | } catch (Exception e) { |
83 | 0 | throw new WorkflowRuntimeException("Failed to find field to validate.", e); |
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} |
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} |
86 | 0 | return ""; |
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} |
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}; |
89 | 0 | } else if (fname.equals(new QName("http://nothingfornowwf.com", "empty", "wf"))) { |
90 | 0 | return new XPathFunction() { |
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public Object evaluate(java.util.List args) { |
92 | 0 | return empty(args.get(0)); |
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} |
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}; |
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} else { |
96 | 0 | return null; |
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} |
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} |
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public String field(String fieldName) throws Exception { |
101 | 0 | return xpath.evaluate("//edlContent/data/version[@current='true']/field[@name='" + fieldName + "']/value", rootNode); |
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} |
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public boolean empty(Object object) { |
106 | 0 | if (object instanceof String) { |
107 | 0 | return StringUtils.isBlank((String)object); |
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} |
109 | 0 | return object == null; |
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} |
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public List<RuleExtension> getRuleExtensions() { |
113 | 0 | return this.ruleExtensions; |
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} |
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public void setRuleExtensions(List<RuleExtension> ruleExtensions) { |
117 | 0 | this.ruleExtensions = ruleExtensions; |
118 | 0 | } |
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public Node getRootNode() { |
121 | 0 | return rootNode; |
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} |
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public void setRootNode(Node rootNode) { |
125 | 0 | this.rootNode = rootNode; |
126 | 0 | } |
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public XPath getXpath() { |
130 | 0 | return xpath; |
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} |
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public void setXpath(XPath xpath) { |
134 | 0 | this.xpath = xpath; |
135 | 0 | } |
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} |