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authorSmokowski, Kevin (ks6305) <kevin.smokowski@att.com>2019-01-03 22:00:51 +0000
committerKevin Smokowski <kevin.smokowski@att.com>2019-01-03 22:04:46 +0000
commit57fd31e090909d55a36f957e45a84d9295254d44 (patch)
treedd2d69f9285b060b850e868b4e2554b23605b037 /template-node/provider/src/main
parent62e62331a294052109f02686e4529fe613355990 (diff)
create a directive for the template node
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>
Diffstat (limited to 'template-node/provider/src/main')
-rwxr-xr-xtemplate-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/HideNullJson.java98
-rwxr-xr-x[-rw-r--r--]template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/TemplateNode.java6
2 files changed, 104 insertions, 0 deletions
diff --git a/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/HideNullJson.java b/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/HideNullJson.java
new file mode 100755
index 00000000..d39d7e40
--- /dev/null
+++ b/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/HideNullJson.java
@@ -0,0 +1,98 @@
+
+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("\"");
+ }
+
+} \ No newline at end of file
diff --git a/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/TemplateNode.java b/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/TemplateNode.java
index 0b5850a0..6c0686c0 100644..100755
--- a/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/TemplateNode.java
+++ b/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/TemplateNode.java
@@ -25,6 +25,7 @@ package org.onap.ccsdk.sli.plugins.template;
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;
@@ -52,6 +53,7 @@ public class TemplateNode implements SvcLogicJavaPlugin {
ve = new VelocityEngine();
setProperties();
ve.init();
+ ve.loadDirective("org.onap.ccsdk.sli.plugins.template.HideNullJson");
}
protected void setProperties() {
@@ -97,6 +99,10 @@ public class TemplateNode implements SvcLogicJavaPlugin {
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());