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groovy - 在 Bonita 中使用 Groovy 时没有方法错误的签名

问题描述

我正在使用 Bonita 7.7.4。Groovy 脚本可以在 Bonita 中使用。我写了下面的脚本并且它有效，但是当“状态”字段不退出时，它有错误。

String status = apiAccessor.identityAPI.getCustomUserInfo(startedById, 0, 1000).stream().filter({ row ->
        "status" == row.getDefinition().getName() 
}).findFirst().orElse("").getValue();

错误：

Possible solutions: getClass(), getAt(int), getAt(groovy.lang.Range), getAt(java.lang.String), getAt(groovy.lang.Range), getAt(java.util.Collection) ( ). ( )
at org.bonitasoft.engine.execution.ProcessExecutorImpl.start(ProcessExecutorImpl.java:839)
at org.bonitasoft.engine.execution.ProcessExecutorImpl.start(ProcessExecutorImpl.java:782)
at org.bonitasoft.engine.api.impl.ProcessStarter.start(ProcessStarter.java:132)
at org.bonitasoft.engine.api.impl.ProcessStarter.start(ProcessStarter.java:103)
at ... 44 more. ( )
at  Caused by: org.bonitasoft.engine.expression.exception.SExpressionEvaluationException.: groovy.lang.MissingMethodException: No signature of method: java.lang.String.getValue() is applicable for argument types: () values: []
 Possible solutions: getClass(), getAt(int), getAt(groovy.lang.Range), getAt(java.lang.String), getAt(groovy.lang.Range), getAt(java.util.Collection) ( ). ( )
at org.bonitasoft.engine.expression.impl.GroovyScriptExpressionExecutorCacheStrategy.evaluate(GroovyScriptExpressionExecutorCacheStrategy.java:147)
at org.bonitasoft.engine.expression.impl.ExpressionServiceImpl.evaluate(ExpressionServiceImpl.java:86)
at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluateExpressionWithResolvedDependencies(ExpressionResolverServiceImpl.java:213)
at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluateExpressionsFlatten(ExpressionResolverServiceImpl.java:120)
at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluate(ExpressionResolverServiceImpl.java:83)
at org.bonitasoft.engine.execution.ProcessExecutorImpl.initializeSingleBusinessData(ProcessExecutorImpl.java:448)
at org.bonitasoft.engine.execution.ProcessExecutorImpl.initializeBusinessData(ProcessExecutorImpl.java:435)
at org.bonitasoft.engine.execution.ProcessExecutorImpl.initialize(ProcessExecutorImpl.java:387)
at org.bonitasoft.engine.execution.ProcessExecutorImpl.start(ProcessExecutorImpl.java:824)
at ... 47 more. ( )
at  Caused by: groovy.lang.MissingMethodException.: No signature of method: java.lang.String.getValue() is applicable for argument types: () values: []
  Possible solutions: getClass(), getAt(int), getAt(groovy.lang.Range),   getAt(java.lang.String), getAt(groovy.lang.Range), getAt(java.util.Collection) ( ). ( )
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:58)
at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:49)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
at BScript83.run(BScript83.groovy:47)
at org.bonitasoft.engine.expression.impl.GroovyScriptExpressionExecutorCacheStrategy.evaluate(GroovyScriptExpressionExecutorCacheStrategy.java:141)
at ... 55 more. ( )

标签： groovybonita

解决方案

问题就在这里

.findFirst().orElse("").getValue();

改用这个

.findFirst().orElse("");

解释

findFirst()在 a 上调​​用Stream<String>，因此它返回 a Optional<String>。如果流为空，则.orElse("")确保将返回一个空字符串而不是流的第一个元素。显然，如果您宁愿null在流为空时返回，请使用以下命令

.findFirst().orElse(null);

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