DataObjectUtil.java :  » Game » loon-simple » org » loon » framework » game » simple » utils » xml » Android Open Source

package org.loon.framework.game.simple.utils.xml;

import org.loon.framework.game.simple.utils.StringUtils;

/**
 * 
 * Copyright 2008 - 2009
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loonframework
 * @author chenpeng
 * @emailceponline@yahoo.com.cn
 * @version 0.1
 */
class DataObjectUtil {

  public static final int TEXT_STATE = 0;

  public static final int DOLLAR_STATE = 1;

  public static final int FIELD_NAME_STATE = 2;

  public DataObjectUtil() {
  }

  public static String getSubstituteValue(String source, String key,
      String value) {
    DataObject data = new DataObjectImpl();
    data.set(key, value);
    return getSubstituteValue(source, data);
  }

  public static String getSubstituteValue(String value, DataObject data) {
    return getSubstituteValue(value, data, false);
  }

  public static String getSubstituteValue(String value, DataObject data,
      boolean isEscape) {
    if (value == null)
      return null;
    StringBuffer output = new StringBuffer();
    int stateType = 0;
    String key = "";
    for (int i = 0; i < value.length(); i++) {
      char charRead = value.charAt(i);
      if (stateType == 2)
        key = key + charRead;
      switch (charRead) {
      case 36: // '$'
        stateType = 1;
        char next2Read = value.charAt(i + 2);
        if ('$' == next2Read)
          output.append(charRead);
        break;

      case 123: // '{'
        if (stateType == 1) {
          char nextRead = value.charAt(i + 1);
          if ('$' != nextRead) {
            stateType = 2;
          } else {
            output.append(charRead);
          }
        } else {
          output.append(charRead);
        }
        break;

      case 125: // '}'
        if (stateType == 2) {
          String name = key.substring(0, key.length() - 1);
          String obj = data.get(name.toLowerCase());
          if (obj == null) {
            obj = "";
          }
          if (isEscape) {
            obj = StringUtils.toFromXML(obj);
          }
          output.append(obj);
          stateType = 0;
          key = "";
          break;
        }
      default:
        if (stateType != 2)
          output.append(charRead);
        break;
      }
    }

    return output.toString();
  }

}