public boolean removeInput(Operator input) {
String inName = input.getAttribute("id"); // get the name if input to remove from this
if (inName == null || inName.isEmpty()) { // no name of input to remove
System.out.println("Input node has no id"); // warn
return false; // no valid input name to remove, abort
}
String inputString = this.getAttribute("input"); // get string listing input names for this
ArrayList<String> ins; // declare an array list
if (inputString == null || inputString.isEmpty()) { // empty list to remove from
return false; // nothing to remove, abort
} else { // input string is not empty
// split input string at spaces and make new array list
ins = new ArrayList<String>(Arrays.asList(this.getAttribute("input").split(" ")));
}
if (!ins.contains(inName)) { // input is not present to be removed
return false; // no input to remove, abort
} else { // remove the input
ins.remove(inName); // remove the desired input.
// rebuild input string
String allIns = ""; // empty string to hold list of inputs
for (String s : ins) { // iterate over inputs
allIns += s + " "; // append input name to string with space
}
allIns = allIns.trim(); // remove trailing space
this.setAttribute("input", allIns); // set intput attribute to this string of inputs
return true; // success! return true
}
}
public boolean addInput(Operator input) {
String inName = input.getAttribute("id"); // get the id of input to add
if (inName == null || inName.isEmpty()) { // make sure input has a valid name
System.out.println("Input node has no id"); // no valid name, print warning and abort
return false;
}
String inputString = this.getAttribute("input"); // get the input string for this op
ArrayList<String> ins; // delcare an array list
if (inputString == null || inputString.isEmpty()) { // if the input string is empty
ins = new ArrayList<String>(); // make an empty array list
} else { // input string is not empty
// split input into ArrayList at spaces
ins = new ArrayList<String>(Arrays.asList(this.getAttribute("input").split(" ")));
}
if (ins.contains(inName)) { // check if input is already present
return false; // input already present, abort
} else { // input is not yet present
ins.add(inName); // add input to array list
String allIns = ""; // empty string to hold list of inputs
for (String s : ins) { // iterate over inputs
allIns += s + " "; // append input name to string with space
}
allIns = allIns.trim(); // remove trailing space
this.setAttribute("input", allIns); // set intput attribute to this string of inputs
return true; // success! return true
}
}