ConstructorFieldsConverter.java

package org.springframework.roo.converters;

import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.StringTokenizer;

import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Service;
import org.springframework.roo.shell.Completion;
import org.springframework.roo.shell.Converter;
import org.springframework.roo.shell.MethodTarget;

/**
 * Provides conversion between a space-separated list of field names to a set of
 * field names for use in a constructor.
 * 
 * @author Alan Stewart
 * @since 1.2.3
 */
@Component
@Service
public class ConstructorFieldsConverter implements Converter<Set<String>> {

  public Set<String> convertFromText(final String value, final Class<?> requiredType,
      final String optionContext) {
    final Set<String> fields = new LinkedHashSet<String>();
    final StringTokenizer st = new StringTokenizer(value, " ");
    while (st.hasMoreTokens()) {
      fields.add(st.nextToken());
    }
    return fields;
  }

  public boolean getAllPossibleValues(final List<Completion> completions,
      final Class<?> requiredType, final String existingData, final String optionContext,
      final MethodTarget target) {
    return false;
  }

  public boolean supports(final Class<?> requiredType, final String optionContext) {
    return Set.class.isAssignableFrom(requiredType) && optionContext.contains("constructor-fields");
  }
}