87 lines
2.5 KiB
Java
87 lines
2.5 KiB
Java
/**
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*
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*/
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package eu.dnetlib.data.collective.transformation.engine.functions;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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import java.util.Queue;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.util.StringUtils;
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/**
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* @author js
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*
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*/
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public class Split extends AbstractTransformationFunction {
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public static final Log log = LogFactory.getLog(Split.class);
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public static final String paramInputExpr = "inputExpr";
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public static final String paramRegExpr = "regExpr";
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public static final String paramElementName = "elementName";
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private Map<String, Queue<String>> queueMap = new HashMap<String, Queue<String>>();
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/* (non-Javadoc)
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* @see eu.dnetlib.data.collective.transformation.engine.functions.AbstractTransformationFunction#execute()
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*/
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@Override
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String execute() throws ProcessingException {
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// TODO Auto-generated method stub
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return null;
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}
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/**
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* split a given list of values using a delimiter as regularExpression
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* @param aInputValue
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* @param aRegExpr
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* @return the collection of all values splitted
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*/
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public Collection<String> executeAllValues(List<String> aInputValues, String aRegExpr) throws ProcessingException{
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Collection<String> result = new LinkedList<String>();
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for (String value: aInputValues){
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String[] values = StringUtils.tokenizeToStringArray(value, aRegExpr, true, true);
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result.addAll(Arrays.asList(values));
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}
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return result;
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}
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/**
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* split a given list of values stored in an internal queue and return the element from the head of the queue (recursive)
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* @param aInputValues
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* @param aRegExpr
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* @param aCallId
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* @return
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* @throws ProcessingException
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*/
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public String executeSingleValue(List<String> aInputValues, String aRegExpr, String aCallId) throws ProcessingException{
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if (!queueMap.containsKey(aCallId)){
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Queue<String> queue = new LinkedList<String>();
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queueMap.put(aCallId, queue);
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for (String value: aInputValues){
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String[] values = StringUtils.tokenizeToStringArray(value, aRegExpr, true, true);
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queue.addAll(Arrays.asList(values));
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}
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}
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String result = queueMap.get(aCallId).poll();
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if (result == null){
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queueMap.remove(aCallId);
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}
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return result;
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}
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public String executeSingleValue(String aCallId) throws ProcessingException{
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String result = queueMap.get(aCallId).poll();
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if (result == null){
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queueMap.remove(aCallId);
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}
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return result;
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}
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}
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