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package tim.prune.data;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Class to hold an ordered list of fields
* to match the value list in a data point
*/
public class FieldList
{
/** List of Field objects */
private final ArrayList<Field> _fields;
/**
* Constructor for an empty field list
*/
public FieldList() {
_fields = new ArrayList<>();
}
/**
* Constructor giving multiple Field objects
* @param inFields Field objects
*/
public FieldList(Field ... inFields)
{
this();
Collections.addAll(_fields, inFields);
}
/**
* Get the index of the given field
* @param inField field to look for
* @return index number of the field starting at zero
*/
public int getFieldIndex(Field inField)
{
if (inField == null) return -1;
int index = 0;
for (Field field : _fields)
{
if (field != null && field.equals(inField)) {
return index;
}
index++;
}
return -1;
}
/**
* Check whether the FieldList contains the given Field object
* @param inField Field to check
* @return true if the FieldList contains the given field
*/
public boolean contains(Field inField) {
return getFieldIndex(inField) >= 0;
}
/**
* @return number of fields in list
*/
public int getNumFields() {
return _fields.size();
}
/**
* Get the specified Field object
* @param inIndex index to retrieve
* @return Field object
*/
public Field getField(int inIndex)
{
try {
return _fields.get(inIndex);
}
catch (IndexOutOfBoundsException e) {
return null;
}
}
/**
* Merge this list with a second list, giving a superset
* @param inOtherList other FieldList object to merge
* @return Merged FieldList object
*/
public FieldList merge(FieldList inOtherList)
{
FieldList superset = new FieldList();
superset._fields.addAll(_fields);
if (inOtherList != null)
{
for (Field field : inOtherList._fields)
{
if (!contains(field)) {
superset._fields.add(field);
}
}
}
return superset;
}
/**
* Extend the field list to include the specified field
* @param inField Field to add
* @return new index of added Field
*/
public int addField(Field inField)
{
// See if field is already in list
int currIndex = getFieldIndex(inField);
if (currIndex >= 0) {
return currIndex;
}
// Add new field and return index
_fields.add(inField);
return getNumFields() - 1;
}
/**
* Extend the field list to include the specified fields
* @param inFields Field objects to add
*/
public void addFields(Field ... inFields)
{
for (Field field : inFields) {
addField(field);
}
}
/**
* Convert to String for debug
*/
public String toString()
{
StringBuilder result = new StringBuilder();
result.append('(');
for (Field field : _fields) {
result.append(field.getName()).append(',');
}
result.append(')');
return result.toString();
}
/** @return list of fields specific to the given file type */
public List<Field> getFields(FileType inFileType)
{
ArrayList<Field> fields = new ArrayList<Field>();
for (Field field : _fields)
{
if (field.isSpecificToFileType(inFileType)) {
fields.add(field);
}
}
return fields;
}
}
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