com.izforge.izpack.util.config.RegistryTask Maven / Gradle / Ivy

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/*
 * IzPack - Copyright 2001-2010 Julien Ponge, All Rights Reserved.
 *
 * http://izpack.org/
 * http://izpack.codehaus.org/
 *
 * Copyright 2005,2009 Ivan SZKIBA
 * Copyright 2010,2011 Rene Krell
 *
 * 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.
 */

package com.izforge.izpack.util.config;

import java.io.IOException;

import com.izforge.izpack.api.adaptator.IXMLElement;
import com.izforge.izpack.util.Debug;
import com.izforge.izpack.util.config.base.Reg;

public class RegistryTask extends SingleConfigurableTask {

  /*
   * Instance variables.
   */

  protected String key;
  protected String fromKey;


  /**
  * Location of the configuration file to be edited; required.
  */
  public void setKey(String key) {
    this.key = key;
  }

  /**
  * Location of the configuration file to be patched from; optional.
  */
  public void setFromKey(String key) {
    this.fromKey = key;
  }

  @Override
  protected void readSourceConfigurable() throws Exception {
    // deal with a registry key to patch from
    if (this.fromKey != null) {
      try {
          Debug.log("Loading from registry: " + this.fromKey);
          fromConfigurable = new Reg(this.fromKey);
      } catch (IOException ioe) {
        throw new Exception(ioe.toString());
      }
    }
  }

  @Override
  protected void readConfigurable() throws Exception {
    if (this.key != null) {
      try {
          Debug.log("Loading from registry: " + this.key);
          configurable = new Reg(this.key);
      } catch (IOException ioe) {
        throw new Exception(ioe.toString());
      }
    }
  }

  @Override
  protected void writeConfigurable() throws Exception {

    if (configurable == null) {
        Debug.log("Registry key " +
          this.key +
          " did not exist and is not allowed to be created");
      return;
    }

    try {
      Reg r = (Reg) configurable;
      r.store();
    } catch (IOException ioe) {
      throw new Exception(ioe);
    }
  }

  @Override
  protected void checkAttributes() throws Exception {
    if (this.key == null) {
      throw new Exception("Key attribute must be set");
    }
  }

  @Override
  protected Entry filterEntryFromXML(IXMLElement parent, Entry entry)
  {
      entry.setSection(parent.getAttribute("key"));
      entry.setKey(parent.getAttribute("value"));
      entry.setValue(parent.getAttribute("data"));
      return entry;
  }
}