/*
 * Copyright (c) 2012 by The Author(s)
 *
 * 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.github.ferstl.maven.pomenforcers;

import org.apache.maven.enforcer.rule.api.EnforcerRule;
import org.apache.maven.enforcer.rule.api.EnforcerRuleException;
import org.apache.maven.enforcer.rule.api.EnforcerRuleHelper;
import org.apache.maven.project.MavenProject;
import org.w3c.dom.Document;

import com.github.ferstl.maven.pomenforcers.model.ProjectModel;
import com.github.ferstl.maven.pomenforcers.serializer.PomSerializer;
import com.github.ferstl.maven.pomenforcers.util.EnforcerRuleUtils;
import com.github.ferstl.maven.pomenforcers.util.XmlUtils;



public abstract class AbstractPedanticEnforcer implements EnforcerRule {

  private Document pom;
  private ProjectModel projectModel;

  @Override
  public void execute(EnforcerRuleHelper helper) throws EnforcerRuleException {
    // Read the POM
    MavenProject project = EnforcerRuleUtils.getMavenProject(helper);
    this.pom = XmlUtils.parseXml(project.getFile());

    // Enforce
    doEnforce(helper);
  }

  /**
   * Sets the POM document for this enforcer. Use this method when the enforcer rules are not
   * constructed within the maven ecosystem.
   * @param pom The POM document for this enforcer.
   */
  void setPomDocument(Document pom) {
    this.pom = pom;
  }

  protected Document getPom() {
    return this.pom;
  }

  protected ProjectModel getProjectModel() {
    if (this.projectModel == null) {
      this.projectModel = new PomSerializer(this.pom).read();
    }
    return this.projectModel;
  }

  protected abstract void doEnforce(EnforcerRuleHelper helper) throws EnforcerRuleException;

  protected abstract void accept(PedanticEnforcerVisitor visitor);

  @Override
  public boolean isCacheable() {
    return false;
  }

  @Override
  public boolean isResultValid(EnforcerRule cachedRule) {
    return false;
  }

  @Override
  public String getCacheId() {
    return getClass() + "-uncachable";
  }
}

@@ -1577,16 +1577,77 @@
 ile());%0D
+%0A    this.projectModel = new PomSerializer(this.pom).read();%0D
 %0A%0D%0A    /
@@ -2075,116 +2075,8 @@
  %7B%0D%0A
-    if (this.projectModel == null) %7B%0D%0A      this.projectModel = new PomSerializer(this.pom).read();%0D%0A    %7D%0D%0A
     

create ProjectModel directly