Com auxílio do Wellyton, finalizei o botão de ação que eu necessitava. Compartilho com os demais colegas.

package br.com.sankhya.testesvictor;

import java.math.BigDecimal;
\nimport java.util.ArrayList;
\nimport java.util.Collection;
\nimport java.util.List;

import br.com.sankhya.extensions.actionbutton.AcaoRotinaJava;
\nimport br.com.sankhya.extensions.actionbutton.ContextoAcao;
\nimport br.com.sankhya.extensions.actionbutton.QueryExecutor;
\nimport br.com.sankhya.extensions.actionbutton.Registro;
\nimport br.com.sankhya.jape.EntityFacade;
\nimport br.com.sankhya.jape.util.FinderWrapper;
\nimport br.com.sankhya.jape.util.JapeSessionContext;
\nimport br.com.sankhya.jape.vo.DynamicVO;
\nimport br.com.sankhya.modelcore.comercial.CentralFinanceiro;
\nimport br.com.sankhya.modelcore.comercial.CentralItemNota;
\nimport br.com.sankhya.modelcore.comercial.centrais.CACHelper;
\nimport br.com.sankhya.modelcore.util.DynamicEntityNames;
\nimport br.com.sankhya.modelcore.util.EntityFacadeFactory;
\nimport br.com.sankhya.ws.ServiceContext;

public class TesteAtualizaPreco implements AcaoRotinaJava {

@Override\npublic void doAction(ContextoAcao ctx) throws Exception {\n\t// TODO Auto-generated method stub\n\t\n\tRegistro [] linhasSelecionadas = ctx.getLinhas();\n\t\n\tfor(Registro linha : linhasSelecionadas) {\n\t\t\n\t\tEntityFacade dwfEntityFacade = EntityFacadeFactory.getDWFFacade();\n\t\t\n\t\tQueryExecutor query = ctx.getQuery();\n\t\tquery.setParam(\"P_NUNOTA\", linha.getCampo(\"NUNOTA\"));\n\t\t\n\t\tquery.nativeSelect(\"SELECT ITE.SEQUENCIA AS SEQUENCIA, ITE.QTDNEG AS QTDNEG, ITE.CODPROD AS CODPROD, ITE.VLRUNIT AS VLRUNIT, ITE.NUNOTA ITE_NUNOTA, CAB.CODTIPVENDA AS CODTIPVENDA, SNK_PRECO(TPV.CODTAB, ITE.CODPROD) AS PRECO_TABELA\\r\\n\"\n\t\t\t\t+ \"FROM TGFITE ITE\\r\\n\"\n\t\t\t\t+ \"LEFT JOIN TGFCAB CAB ON CAB.NUNOTA = ITE.NUNOTA\\r\\n\"\n\t\t\t\t+ \"LEFT JOIN TGFTPV TPV ON TPV.CODTIPVENDA = CAB.CODTIPVENDA AND TPV.DHALTER = CAB.DHTIPVENDA\\r\\n\"\n\t\t\t\t+ \"WHERE CAB.NUNOTA = {P_NUNOTA} AND ITE.VLRUNIT <> SNK_PRECO(TPV.CODTAB, ITE.CODPROD) AND SNK_PRECO(TPV.CODTAB, ITE.CODPROD) > 0\");\n\t\t\n\t\twhile (query.next()) {\n\t\t\t\n\t\t\tServiceContext servico = ServiceContext.getCurrent(); \n\t\t    BigDecimal nunota = query.getBigDecimal(\"ITE_NUNOTA\");\n\t\t    BigDecimal sequencia = query.getBigDecimal(\"SEQUENCIA\");\n\t\t    Collection<DynamicVO>  itemAtual = dwfEntityFacade.findByDynamicFinderAsVO(new FinderWrapper(DynamicEntityNames.ITEM_NOTA, \"this.NUNOTA = ? AND this.SEQUENCIA = ?\", new Object[] { nunota, sequencia  }));\n\t\t    BigDecimal qtd = query.getBigDecimal(\"QTDNEG\");\n\t\t    BigDecimal vlr = query.getBigDecimal(\"PRECO_TABELA\");\n\t\t    \n\t\t    for (DynamicVO item : itemAtual) {\n\t\t    \tatualizarItemNota(servico,nunota, item, qtd, vlr);\n\t\t    }\n\t\t\t\n\t\t}\n\t\t\n\t}\n\n}\n\nprivate static void atualizarItemNota(ServiceContext servico, BigDecimal nunota, DynamicVO itemAtual, BigDecimal qtd, BigDecimal vlr) throws Exception {\n\titemAtual.setProperty(\"VLRUNIT\", vlr);\n\titemAtual.setProperty(\"VLRTOT\", vlr.multiply(qtd));\n\n\tCentralItemNota itemNota = new CentralItemNota();\n\titemNota.recalcularValores(\"VLRUNIT\", vlr.toString(), itemAtual, nunota);\n\n\tList<DynamicVO> itensFatura = new ArrayList<DynamicVO>();\n\titensFatura.add(itemAtual);\n\n\tCACHelper cacHelper = new CACHelper();\n\tcacHelper.incluirAlterarItem(nunota, servico, null, false, itensFatura);\n\t\n\tCentralFinanceiro financeiro = new CentralFinanceiro();\n\tfinanceiro.inicializaNota(nunota);\n\tJapeSessionContext.putProperty(\"br.com.sankhya.com.CentralCompraVenda\", Boolean.TRUE);\n\tfinanceiro.refazerFinanceiro();\n}\n

}

Botao De Acao Que Atualiza Preco Dos Itens