Application: gvSIG desktop

package org.gvsig.fmap.dal.swing.impl.expressionevaluator.suggestions;

import java.util.Collections;

import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

import org.apache.commons.lang3.RandomUtils;

import org.gvsig.expressionevaluator.swing.SuggestionProvider;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.i18n.I18nManager;

import org.gvsig.tools.util.Factory;

/**

 *

 * @author jjdelcerro

 */

@SuppressWarnings("UseSpecificCatch")

public class QuotesForFieldNameSuggestionProviderFactory implements Factory {

  private static long lastSuggestedTime = 0;

  private final static Pattern VALID_IDENTIFIER = Pattern.compile("[A-Za-z_]*[A-Za-z0-9_]*");

  private final FeatureStore store;

  private boolean suggestionApplies;

  public QuotesForFieldNameSuggestionProviderFactory(FeatureStore store) {

    this.store = store;

    String storename = store.getName();

    this.suggestionApplies = false;

    for (FeatureAttributeDescriptor attr : getFeatureAttributeDescriptors()) {

      if (!VALID_IDENTIFIER.matcher(attr.getName()).matches()) {

        this.suggestionApplies = true;

        break;

      }

    }

  }

  private Iterable<FeatureAttributeDescriptor> getFeatureAttributeDescriptors() {

    try {

      return this.store.getDefaultFeatureType();

    } catch (DataException ex) {

      return Collections.EMPTY_LIST;

    }

  }

  @Override

  public String getName() {

    return "QuotesForFieldNameSuggestion";

  }

  @Override

  public Object create(Object... parameters) {

    SuggestionProvider suggestionProvider = new QuotesForFieldNameSuggestionProvider();

    return suggestionProvider;

  }

  private class QuotesForFieldNameSuggestionProvider implements SuggestionProvider {

    @Override

    public String getSuggestion(String expression) {

      if (!suggestionApplies || StringUtils.isBlank(expression)) {

        return null;

      }

      long now = System.currentTimeMillis();

      if ( now - lastSuggestedTime >= RandomUtils.nextInt(5, 15) * 60 * 1000) {

        lastSuggestedTime = System.currentTimeMillis();

        I18nManager i18n = ToolsLocator.getI18nManager();

        String suggestion = i18n.getTranslation("_You_must_use_double_quotes_to_use_a_field_that_is_not_a_valid_identifier_When_the_name_does_not_start_with_a_letter_or_contains_characters_that_are_not_letters_numbers_or_underscore");

        return suggestion;

      }

      return null;

    }

  }

}