/**
    *
    */
   package net.sf.flatpack.xml;
   
   import java.util.Collections;
   import java.util.HashMap;
   import java.util.Iterator;
   import java.util.List;
  import java.util.Map;
  import java.util.Map.Entry;
  
  import net.sf.flatpack.structure.ColumnMetaData;
  import net.sf.flatpack.util.FPConstants;
  
  /**
   * @author Benoit Xhenseval
   *
   */
  public class MetaData {
      private List<ColumnMetaData> columnsNames;
      private Map columnIndexMap;
      private final Map<String, XMLRecordElement> xmlRecordElements;
  
      public MetaData(final List<ColumnMetaData> columnNames, final Map columnIndexMap) {
          this.columnsNames = Collections.unmodifiableList(columnNames);
          this.columnIndexMap = Collections.unmodifiableMap(columnIndexMap);
          this.xmlRecordElements = new HashMap();
      }
  
      MetaData(final List<ColumnMetaData> columnNames, final Map columnIndexMap, final Map<String, XMLRecordElement> xmlRecordElements) {
          this.columnsNames = Collections.unmodifiableList(columnNames);
          this.columnIndexMap = columnIndexMap;
          this.xmlRecordElements = xmlRecordElements;
      }
  
      public List<ColumnMetaData> getColumnsNames() {
          return columnsNames;
      }
  
      public Map getColumnIndexMap() {
          return columnIndexMap;
      }
  
      public void setColumnIndexMap(final Map columnIndexMap) {
          this.columnIndexMap = columnIndexMap;
      }
  
      public void setColumnsNames(final List<ColumnMetaData> columnsNames) {
          this.columnsNames = Collections.unmodifiableList(columnsNames);
      }
  
      public boolean isAnyRecordFormatSpecified() {
          return xmlRecordElements != null && !xmlRecordElements.isEmpty();
      }
  
      public Iterator<Entry<String, XMLRecordElement>> xmlRecordIterator() {
          return xmlRecordElements.entrySet().iterator();
      }
  
      public List<ColumnMetaData> getListColumnsForRecord(final String key) {
          return xmlRecordElements.get(key).getColumns();
      }
  
      public int getColumnIndex(final String key, final String columnName) {
          int idx = -1;
          if (key != null && !key.equals(FPConstants.DETAIL_ID) && !key.equals(FPConstants.COL_IDX)) {
              idx = xmlRecordElements.get(key).getColumnIndex(columnName);
          } else if (key == null || key.equals(FPConstants.DETAIL_ID)) {
              final Integer i = (Integer) columnIndexMap.get(columnName);
              if (i != null) { // happens when the col name does not exist in the
                  // mapping
                  idx = i.intValue();
              }
          }
          return idx;
      }
  
      @Override
      public String toString() {
          final StringBuilder buf = new StringBuilder();
          buf.append("Col Names:").append(columnsNames).append(System.lineSeparator());
          buf.append("Col Index Map:").append(columnIndexMap).append(System.lineSeparator());
          buf.append("XML Record Elements:").append(xmlRecordElements).append(System.lineSeparator());
          return buf.toString();
      }
  }