Add java8 streaming example - filter one object types to create another type

fiveobjects · fiveobjects · commit 56dbb72fba21 · 2019-07-23T01:20:25.000+05:30
diff --git a/java/misc/src/main/java/org/openapex/samples/misc/stack/StreamingAPI57152335.java b/java/misc/src/main/java/org/openapex/samples/misc/stack/StreamingAPI57152335.java
@@ -0,0 +1,106 @@
+package org.openapex.samples.misc.stack;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class StreamingAPI57152335 {
+    public static void main(String[] args) {
+        List<AttributeValue> attributeList = createAttributes();
+        List<AttributeOption> optionList = new ArrayList<AttributeOption>();
+        exampleCurrentWay(attributeList, optionList);
+        System.out.println("Attributes: "+attributeList);
+        System.out.println("Options: "+optionList);
+        optionList = new ArrayList<AttributeOption>();
+        exampleStreamingApiWay(attributeList, optionList);
+        System.out.println("Attributes: "+attributeList);
+        System.out.println("Options: "+optionList);
+    }
+
+    private static void exampleCurrentWay(List<AttributeValue> attributeList, List<AttributeOption> optionList){
+        if(attributeList != null){
+            for(AttributeValue aValue : attributeList){
+                if(aValue.getAttributeType().equalsIgnoreCase("Select")){
+                    //AttributeOption aOption = service.getAttributeOption(accessToken, value.getId());
+                    AttributeOption aOption = new AttributeOption(aValue.getCode());
+                    aOption.setAttributeCode(aValue.getCode());
+                    optionList.add(aOption);
+                }
+            }
+        }
+    }
+
+    private static void exampleStreamingApiWay(List<AttributeValue> attributeList, List<AttributeOption> optionList){
+        if(attributeList != null){
+            optionList.addAll(attributeList.stream().filter(attribute -> attribute.getAttributeType().equals("Select"))
+                    .map(attribute -> new AttributeOption(attribute.getCode())).collect(Collectors.toList()));
+        }
+    }
+
+    private static List<AttributeValue> createAttributes(){
+        List<AttributeValue> attribute = new ArrayList<AttributeValue>();
+        attribute.add(new AttributeValue("Select", "001"));
+        attribute.add(new AttributeValue("Abc", "002"));
+        attribute.add(new AttributeValue("Select", "003"));
+        attribute.add(new AttributeValue("Select", "004"));
+        attribute.add(new AttributeValue("Xyz", "005"));
+        return attribute;
+    }
+
+    private static  class AttributeValue {
+        private String attributeType;
+        private String code;
+
+        public AttributeValue(String attributeType, String code){
+            this.attributeType = attributeType;
+            this.code = code;
+        }
+
+        public String getAttributeType() {
+            return attributeType;
+        }
+
+        public void setAttributeType(String attributeType) {
+            this.attributeType = attributeType;
+        }
+
+        public String getCode() {
+            return code;
+        }
+
+        public void setCode(String code) {
+            this.code = code;
+        }
+
+        @Override
+        public String toString() {
+            return "AttributeValue{" +
+                    "attributeType='" + attributeType + '\'' +
+                    ", code='" + code + '\'' +
+                    '}';
+        }
+    }
+
+    private static class AttributeOption {
+        private String attributeCode;
+
+        public AttributeOption(String attributeCode){
+            this.attributeCode = attributeCode;
+        }
+
+        public String getAttributeCode() {
+            return attributeCode;
+        }
+
+        public void setAttributeCode(String attributeCode) {
+            this.attributeCode = attributeCode;
+        }
+
+        @Override
+        public String toString() {
+            return "AttributeOption{" +
+                    "attributeCode='" + attributeCode + '\'' +
+                    '}';
+        }
+    }
+}
