package org.apache.commons.digester;

import java.util.HashMap;
import org.apache.commons.beanutils.BeanUtils;
import org.xml.sax.Attributes;

public class SetPropertiesRule extends Rule {
  private String[] attributeNames;
  
  private String[] propertyNames;
  
  public SetPropertiesRule(Digester digester) {
    this();
  }
  
  public SetPropertiesRule() {}
  
  public SetPropertiesRule(String attributeName, String propertyName) {
    this.attributeNames = new String[1];
    this.attributeNames[0] = attributeName;
    this.propertyNames = new String[1];
    this.propertyNames[0] = propertyName;
  }
  
  public SetPropertiesRule(String[] attributeNames, String[] propertyNames) {
    this.attributeNames = new String[attributeNames.length];
    for (int i = 0, size = attributeNames.length; i < size; i++)
      this.attributeNames[i] = attributeNames[i]; 
    this.propertyNames = new String[propertyNames.length];
    for (int j = 0, k = propertyNames.length; j < k; j++)
      this.propertyNames[j] = propertyNames[j]; 
  }
  
  public void begin(Attributes attributes) throws Exception {
    HashMap values = new HashMap();
    int attNamesLength = 0;
    if (this.attributeNames != null)
      attNamesLength = this.attributeNames.length; 
    int propNamesLength = 0;
    if (this.propertyNames != null)
      propNamesLength = this.propertyNames.length; 
    for (int i = 0; i < attributes.getLength(); i++) {
      String name = attributes.getLocalName(i);
      if ("".equals(name))
        name = attributes.getQName(i); 
      String value = attributes.getValue(i);
      for (int n = 0; n < attNamesLength; n++) {
        if (name.equals(this.attributeNames[n])) {
          if (n < propNamesLength) {
            name = this.propertyNames[n];
            break;
          } 
          name = null;
          break;
        } 
      } 
      if (this.digester.log.isDebugEnabled())
        this.digester.log.debug("[SetPropertiesRule]{" + this.digester.match + "} Setting property '" + name + "' to '" + value + "'"); 
      if (name != null)
        values.put(name, value); 
    } 
    Object top = this.digester.peek();
    if (this.digester.log.isDebugEnabled())
      this.digester.log.debug("[SetPropertiesRule]{" + this.digester.match + "} Set " + top.getClass().getName() + " properties"); 
    BeanUtils.populate(top, values);
  }
  
  public void addAlias(String attributeName, String propertyName) {
    if (this.attributeNames == null) {
      this.attributeNames = new String[1];
      this.attributeNames[0] = attributeName;
      this.propertyNames = new String[1];
      this.propertyNames[0] = propertyName;
    } else {
      int length = this.attributeNames.length;
      String[] tempAttributes = new String[length + 1];
      for (int i = 0; i < length; i++)
        tempAttributes[i] = this.attributeNames[i]; 
      tempAttributes[length] = attributeName;
      String[] tempProperties = new String[length + 1];
      for (int j = 0; j < length && j < this.propertyNames.length; j++)
        tempProperties[j] = this.propertyNames[j]; 
      tempProperties[length] = propertyName;
      this.propertyNames = tempProperties;
      this.attributeNames = tempAttributes;
    } 
  }
  
  public String toString() {
    StringBuffer sb = new StringBuffer("SetPropertiesRule[");
    sb.append("]");
    return sb.toString();
  }
}