public class RKeyDataRule {
private int id;
private int businessProcessId;
private int xpathKeyDataId;
public RKeyDataRule(int i, int j, int k) {
this.id = i;
this.businessProcessId = j;
this.xpathKeyDataId = k;
}
/**
* @return the id
*/
public int getId() {
return id;
}
/**
* @param id the id to set
*/
public void setId(int id) {
this.id = id;
}
/**
* @return the businessProcessId
*/
public int getBusinessProcessId() {
return businessProcessId;
}
/**
* @param businessProcessId the businessProcessId to set
*/
public void setBusinessProcessId(int businessProcessId) {
this.businessProcessId = businessProcessId;
}
/**
* @return the xpathKeyDataId
*/
public int getXpathKeyDataId() {
return xpathKeyDataId;
}
/**
* @param xpathKeyDataId the xpathKeyDataId to set
*/
public void setXpathKeyDataId(int xpathKeyDataId) {
this.xpathKeyDataId = xpathKeyDataId;
}
}
#
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;
public class Test {
public static void main(String[] args) {
Iterable<RKeyDataRule> itrRKeyDataRule = Arrays.asList(
new RKeyDataRule(1,1,1),
new RKeyDataRule(2,1,2),
new RKeyDataRule(3,1,3),
new RKeyDataRule(4,1,4),
new RKeyDataRule(5,1,5),
new RKeyDataRule(6,2,6),
new RKeyDataRule(7,2,7),
new RKeyDataRule(8,2,8),
new RKeyDataRule(9,2,9),
new RKeyDataRule(10,2,10)
);
List<RKeyDataRule> lRKeyDataRule = new ArrayList<RKeyDataRule>();
StreamSupport.stream(itrRKeyDataRule.spliterator(), false)
.filter(rule -> rule.getXpathKeyDataId()%2==0)
.forEach(lRKeyDataRule::add);
Map<Integer, List<RKeyDataRule>> rKeyDataRuleGroupedByProc = lRKeyDataRule.stream().collect(Collectors.groupingBy(RKeyDataRule::getBusinessProcessId));
Map<Integer, List<Integer>> procAndMainXpaths = new HashMap<>();
for(Entry<Integer, List<RKeyDataRule>> entry : rKeyDataRuleGroupedByProc.entrySet()) {
List<Integer> lmainXpaths = new ArrayList<Integer>();
entry.getValue().stream().map(m -> m.getXpathKeyDataId()).forEach(lmainXpaths::add);
procAndMainXpaths.put(entry.getKey(), lmainXpaths);
}
System.out.println(procAndMainXpaths);
}
}
#
А на выходе
{1 = [2, 4], 2 = [6, 8, 10]}