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Version: v11.7.1

Tree Use Case - from Java Service


  1. Create the source structure for Tree as a Java Service by name TreeData.
  2. The following code needs to be added to the Java service.
  • Import the ArrayList utility:
import java.util.ArrayList;
import java.util.List;
  • Add the following array structure:
public String label;
public String icon;
public List<TreeData> subItems;
  • Add the following methods:
public TreeData() {

}

public TreeData(String label, String icon) {
this.label = label;
this.icon = icon;
}

public List<TreeData> getTreeNodesList() {
return this.subItems;
}

public void setTreeNodesList(List<TreeData> children) {
this.subItems = children;
}

public String getLabel() {
return label;
}

public void setLabel(String label) {
this.label = label;
}

public String getIcon() {
return icon;
}

public void setIcon(String icon) {
this.icon = icon;
}
  • Add the following main method:
public List<TreeData> sampleJavaOperation(String name) {
String result = null;
try {
TreeData TreeData1 = new TreeData("C:", "test1");
TreeData TreeData2 = new TreeData("Program Files", "glyphicon glyphicon-star");
TreeData TreeData3 = new TreeData("System 32", "glyphicon glyphicon-ok");
TreeData TreeData4 = new TreeData("D:", "test4");
TreeData TreeData5 = new TreeData("My Documents", "glyphicon glyphicon-chevron-right");
TreeData TreeData9 = new TreeData("Songs", "glyphicon glyphicon-music");
TreeData TreeData10 = new TreeData("Movies", "glyphicon glyphicon-film");
TreeData TreeData6 = new TreeData("Pictures", "glyphicon glyphicon-picture");
TreeData TreeData7 = new TreeData("Pic1", "glyphicon glyphicon-picture");
TreeData TreeData8 = new TreeData("Pic2", "glyphicon glyphicon-picture");
List<TreeData> children = new ArrayList();
children.add(TreeData2);
children.add(TreeData3);
List<TreeData> children1 = new ArrayList();
children1.add(TreeData5);
children1.add(TreeData6);
List<TreeData> children2 = new ArrayList();
children2.add(TreeData1);
children2.add(TreeData3);
TreeData1.setTreeNodesList(children);
TreeData4.setTreeNodesList(children1);
List<TreeData> children3 = new ArrayList();
children3.add(TreeData7);
children3.add(TreeData8);
TreeData6.setTreeNodesList(children3);
List<TreeData> children4 = new ArrayList();
children4.add(TreeData9);
children4.add(TreeData10);
TreeData5.setTreeNodesList(children4);
List<TreeData> allTrees = new ArrayList();
allTrees.add(TreeData1);
allTrees.add(TreeData4);
return allTrees;
} catch (Exception e) {
logger.error("Sample java service operation has failed", e);
throw e;
}
}
}
  1. Create a Java Service VariableService to invoke the above Java Service.
  2. Drag and drop a Tree widget, bind the Dataset to the above Java Service Variable.
  3. Preview the page to see Tree widget in action.

See Also

Tree Widget Cases
How to build a tree from static variable
How to build a dynamic tree