JLineCompletorAdapter.java

package org.springframework.roo.shell.jline;

import java.util.ArrayList;
import java.util.List;

import jline.Completor;

import org.apache.commons.lang3.Validate;
import org.springframework.roo.shell.Completion;
import org.springframework.roo.shell.Parser;

/**
 * An implementation of JLine's {@link Completor} interface that delegates to a
 * {@link Parser}.
 * 
 * @author Ben Alex
 * @since 1.0
 */
public class JLineCompletorAdapter implements Completor {

  private final Parser parser;

  public JLineCompletorAdapter(final Parser parser) {
    Validate.notNull(parser, "Parser required");
    this.parser = parser;
  }

  @SuppressWarnings("all")
  public int complete(final String buffer, final int cursor, final List candidates) {
    int result;
    try {
      JLineLogHandler.cancelRedrawProhibition();
      final List<Completion> completions = new ArrayList<Completion>();
      result = parser.completeAdvanced(buffer, cursor, completions);
      for (final Completion completion : completions) {
        candidates.add(new jline.Completion(completion.getValue(), completion.getFormattedValue(),
            completion.getHeading()));
      }
    } finally {
      JLineLogHandler.prohibitRedraw();
    }
    return result;
  }
}