xml/xml-psi-impl/src/com/intellij/xml/actions/validate/ErrorReporter.java

/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * 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.intellij.xml.actions.validate;

import com.intellij.openapi.progress.ProcessCanceledException;
import com.intellij.xml.util.XmlResourceResolver;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

import java.io.FileNotFoundException;
import java.net.*;
import java.util.HashSet;
import java.util.Set;

public abstract class ErrorReporter {
  protected final Set<String> ourErrorsSet = new HashSet<String>();
  protected final ValidateXmlActionHandler myHandler;

  public ErrorReporter(ValidateXmlActionHandler handler) {
    myHandler = handler;
  }

  public abstract void processError(SAXParseException ex, ValidateXmlActionHandler.ProblemType warning) throws SAXException;

  public boolean filterValidationException(Exception ex) {
    if (ex instanceof ProcessCanceledException) throw (ProcessCanceledException)ex;
    if (ex instanceof XmlResourceResolver.IgnoredResourceException) throw (XmlResourceResolver.IgnoredResourceException)ex;

    if (ex instanceof FileNotFoundException ||
          ex instanceof MalformedURLException ||
          ex instanceof NoRouteToHostException ||
          ex instanceof SocketTimeoutException ||
          ex instanceof UnknownHostException ||
          ex instanceof ConnectException
          ) {
      // do not log problems caused by malformed and/or ignored external resources
      return true;
    }

    if (ex instanceof NullPointerException) {
      return true; // workaround for NPE at org.apache.xerces.impl.dtd.XMLDTDProcessor.checkDeclaredElements
    }

    return false;
  }

  public void startProcessing() {
    myHandler.doParse();
  }

  public boolean isStopOnUndeclaredResource() {
    return false;
  }

  public boolean isUniqueProblem(final SAXParseException e) {
    String error = myHandler.buildMessageString(e);
    if (ourErrorsSet.contains(error)) return false;
    ourErrorsSet.add(error);
    return true;
  }
}