The directive is called hideNullJson, it hides json when it is null to deal with optional json attributes
Change-Id: I0b7a2c2f19e6f83e0d8c8c6f3552889c83dc997f
Issue-ID: CCSDK-903
Signed-off-by: Smokowski, Kevin (ks6305) <kevin.smokowski@att.com>
--- /dev/null
+
+package org.onap.ccsdk.sli.plugins.template;
+
+import java.io.IOException;
+import java.io.Writer;
+
+import org.apache.velocity.context.InternalContextAdapter;
+import org.apache.velocity.exception.MethodInvocationException;
+import org.apache.velocity.exception.ParseErrorException;
+import org.apache.velocity.exception.ResourceNotFoundException;
+import org.apache.velocity.runtime.directive.Directive;
+import org.apache.velocity.runtime.parser.node.Node;
+
+// This directive can be used when handling optional json attributes in a template
+// If an attribute value is null the entire name-value pair will not be rendered
+// If an attribute value is not null the name-value pair will be rendered
+// Additional optional parameters decide which values are quoted and if a comma and or newline should be appended
+public class HideNullJson extends Directive {
+
+ public String getName() {
+ return "hideNullJson";
+ }
+
+ public int getType() {
+ return BLOCK;
+ }
+
+ // The first parameter is the json key
+ // The second parameter is the json value
+ // This directive handles placing the colon between the json key and json value
+ // The third parameter is a boolean, when true the json key is surrounded in double quotes by this directive
+ // The third parameter is true by default and is optional
+ // The fourth parameter is a boolean when true the json value is surrounded in double quotes by this directive
+ // The fourth parameter is true by default and is optional
+ // The fifth parameter is a boolean when true a comma is appended to the end
+ // The fifth parameter is true by default and is optional
+ // The sixth parameter is a boolean when true a newline is appended to the end
+ // The sixth parameter is true by default and is optional
+ public boolean render(InternalContextAdapter context, Writer writer, Node node)
+ throws IOException, ResourceNotFoundException, ParseErrorException, MethodInvocationException {
+ String tagValue = null;
+ Object tagValueObject = node.jjtGetChild(1).value(context);
+ if (tagValueObject == null) {
+ return true;
+ }
+ tagValue = String.valueOf(tagValueObject);
+
+ String tagName = String.valueOf(node.jjtGetChild(0).value(context));
+
+ Boolean quoteTagName = getBooleanParameter(true,node,2,context);
+ Boolean quoteTagValue = getBooleanParameter(true,node,3,context);
+ Boolean appendComma = getBooleanParameter(true,node,4,context);
+ Boolean appendNewLine = getBooleanParameter(true,node,5,context);
+
+ StringBuilder sb = new StringBuilder();
+
+ if (quoteTagName) {
+ appendQuotedString(tagName,sb);
+ }else {
+ sb.append(tagName);
+ }
+
+ sb.append(":");
+
+ if (quoteTagValue) {
+ appendQuotedString(tagValue,sb);
+ }else {
+ sb.append(tagValue);
+ }
+
+ if(appendComma) {
+ sb.append(",");
+ }
+
+ if(appendNewLine) {
+ sb.append("\n");
+ }
+ writer.write(sb.toString());
+ return true;
+ }
+
+ private Boolean getBooleanParameter(Boolean defaultBool, Node node, int parameterPostion, InternalContextAdapter context) {
+ if (node.jjtGetNumChildren() > parameterPostion && node.jjtGetChild(parameterPostion) != null) {
+ Object val = node.jjtGetChild(parameterPostion).value(context);
+ if (val != null) {
+ return (Boolean) val;
+ }
+ }
+ return defaultBool;
+ }
+
+ private void appendQuotedString(String str, StringBuilder sb) {
+ sb.append("\"");
+ sb.append(str);
+ sb.append("\"");
+ }
+
+}
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import java.io.FileInputStream;
import java.io.StringWriter;
import java.util.Map;
+import java.util.Map.Entry;
import java.util.Properties;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
ve = new VelocityEngine();
setProperties();
ve.init();
+ ve.loadDirective("org.onap.ccsdk.sli.plugins.template.HideNullJson");
}
protected void setProperties() {
VelocityContext context = new VelocityContext();
context.put("ctx", ctx);
context.put("params", params);
+ //Adding these values directly to context makes working with the values cleaner
+ for (Entry<String, String> entry : params.entrySet()) {
+ context.put(entry.getKey(), entry.getValue());
+ }
StringWriter sw = new StringWriter();
template.merge(context, sw);
ctx.setAttribute(outputPath, sw.toString());
--- /dev/null
+package org.onap.ccsdk.sli.plugins.template;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Test;
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+
+public class HideNullJsonTest {
+
+ @Test
+ public void testSampleTemplate() throws Exception {
+ TemplateNode t = new MockTemplateNode();
+
+ Map<String, String> params = new HashMap<String, String>();
+ params.put(TemplateNode.PREFIX_KEY, "output");
+ params.put(TemplateNode.OUTPUT_PATH_KEY, "mycontainer");
+ params.put(TemplateNode.TEMPLATE_PATH, "src/test/resources/HideNullJson.vtl");
+
+ //Setup sample data to feed into the directive
+ params.put("service-type", "\"VPN\""); //the value is quoted to test an override
+ params.put("svc-request-id", "REQ001");
+ params.put("svc-action", "CREATE");
+ params.put("service-instance-id", "SVC001");
+ params.put("customerNameTag", "customer-name");
+ params.put("customer-name", "TestCust");
+ params.put("siidTag", "\"service-instance-id\""); //the value is quoted to test an override
+
+ SvcLogicContext ctx = new SvcLogicContext();
+ t.evaluateTemplate(params, ctx);
+ String result = ctx.getAttribute("output.mycontainer");
+ assertTrue(result.contains("\"svc-request-id\":\"REQ001\","));
+ assertTrue(result.contains("\"svc-action\":\"CREATE\""));
+ assertFalse(result.contains("\"svc-action\":\"CREATE\",")); // there should be no trailing comma
+ assertTrue(result.contains("\"service-type\":\"VPN\","));
+ assertTrue(result.contains("\"customer-name\":\"TestCust\","));
+ assertTrue(result.contains("\"service-instance-id\":\"SVC001\""));
+ assertFalse(result.contains("\"service-instance-id\":\"SVC001\",")); // there should be no trailing comma
+ //This should be hidden by the directive because the parameter was never populated
+ assertFalse(result.contains("customer-phone-number"));
+ }
+
+}
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--- /dev/null
+## This is an example comment
+## This velocity template is used to test the hideNullJson directive
+{
+ "input": {
+ "request-header": {
+## by default the values parameters provided are surrounded in double quotes and separated by a colon
+ #hideNullJson("svc-request-id",$svc-request-id)#end
+## override default settings so the comma isn't written
+ #hideNullJson("svc-action",$svc-action, true, true, false)#end
+ },
+ "service-information": {
+## if we look at the values in parameters we see service-type is already surrounded by quotes
+## we override the default so the string isn't surrounded by excess quotes
+ #hideNullJson("service-type",$service-type,true,false,true)#end
+## the first parameter doesn't need to be a literal
+ #hideNullJson($customerNameTag,$customer-name)#end
+## if the first parameter already has already been quoted we can override the default
+ #hideNullJson($siidTag,$service-instance-id,false,true,false)#end
+ #hideNullJson("customer-phone-number",$customer-phone-number)#end
+ }
+ }
+}
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Code Review / ccsdk / sli / plugins.git / commitdiff