FileStructField.java :  » ERP-CRM-Financial » JFire-1.0.1 » org » nightlabs » jfire » prop » file » Java Open Source

package org.nightlabs.jfire.prop.file;

import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Pattern;

import javax.jdo.annotations.FetchGroup;
import javax.jdo.annotations.FetchGroups;
import javax.jdo.annotations.IdentityType;
import javax.jdo.annotations.Inheritance;
import javax.jdo.annotations.InheritanceStrategy;
import javax.jdo.annotations.Join;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.PersistenceModifier;
import javax.jdo.annotations.Persistent;

import org.nightlabs.jfire.prop.DataBlock;
import org.nightlabs.jfire.prop.StructBlock;
import org.nightlabs.jfire.prop.StructField;
import org.nightlabs.jfire.prop.file.resource.Messages;
import org.nightlabs.jfire.prop.id.StructFieldID;

@PersistenceCapable(
    identityType=IdentityType.APPLICATION,
    detachable="true",
    table="JFirePropFile_FileStructField")
  @FetchGroups(
    @FetchGroup(
      fetchGroups={"default"},
      name="IStruct.fullData",
      members=@Persistent(name="formats"))
  )
  @Inheritance(strategy=InheritanceStrategy.NEW_TABLE)
public class FileStructField extends StructField<FileDataField>
{
  private static final long serialVersionUID = 1L;

  @Persistent(persistenceModifier=PersistenceModifier.PERSISTENT)
  private long maxSizeKB;

  @Join
  @Persistent(
    dependentElement="true",
    table="JFirePropFile_FileStructField_formats"
  )
  private List<String> formats = new LinkedList<String>();
  // TODO we should instead or additionally support content-types here. Marco.


  protected FileStructField() { }

  public FileStructField(StructBlock structBlock, StructFieldID structFieldID) {
    super(structBlock, structFieldID);
  }

  public FileStructField(StructBlock structBlock) {
    super(structBlock);
  }

  public FileStructField(StructBlock structBlock, String structFieldOrganisationID, String structFieldID) {
    super(structBlock, structFieldOrganisationID, structFieldID);
  }


  /*
   * (non-Javadoc)
   * @see org.nightlabs.jfire.prop.StructField#createDataFieldInstanceInternal(org.nightlabs.jfire.prop.DataBlock)
   */
  @Override
  protected FileDataField createDataFieldInstanceInternal(DataBlock dataBlock) {
    return new FileDataField(dataBlock, this);
  }

  /**
   * Add a new file format (file extension) to the list of valid formats of data base on this {@link FileStructField}.
   * @param extension The extension to add.
   */
  public void addFileFormat(String extension) {
    if (!Pattern.matches("(\\w+|\\*)", extension)) //$NON-NLS-1$
      throw new IllegalArgumentException("Invalid extension specified."); //$NON-NLS-1$

    if (!formats.contains(extension)) {
      formats.add(extension);

      notifyModifyListeners();
    }
  }

  public void removeFileFormat(String extension) {
    if (formats.contains(extension)) {
      formats.remove(extension);

      notifyModifyListeners();
    }
  }

  public void clearFileFormats() {
    formats.clear();

    notifyModifyListeners();
  }

  public List<String> getFileFormats() {
    return Collections.unmodifiableList(formats);
  }

  public void setMaxSizeKB(int maxKBytes) {
    this.maxSizeKB = maxKBytes;
    notifyModifyListeners();
  }

  public long getMaxSizeKB() {
    return maxSizeKB;
  }

  public boolean validateData() {
    resetValidationError();
    if (formats.isEmpty()) {
      setValidationError(Messages.getString("org.nightlabs.jfire.prop.file.FileStructField.validationError[formatsEmpty]")); //$NON-NLS-1$
      return false;
    }
    return true;
  }

  public boolean validateSize(long sizeKB) {
    return (sizeKB <= maxSizeKB);
  }

  @Override
  public Class<FileDataField> getDataFieldClass() {
    return FileDataField.class;
  }

}