001: /*
002: * ====================================================================
003: * JAFFA - Java Application Framework For All
004: *
005: * Copyright (C) 2002 JAFFA Development Group
006: *
007: * This library is free software; you can redistribute it and/or
008: * modify it under the terms of the GNU Lesser General Public
009: * License as published by the Free Software Foundation; either
010: * version 2.1 of the License, or (at your option) any later version.
011: *
012: * This library is distributed in the hope that it will be useful,
013: * but WITHOUT ANY WARRANTY; without even the implied warranty of
014: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015: * Lesser General Public License for more details.
016: *
017: * You should have received a copy of the GNU Lesser General Public
018: * License along with this library; if not, write to the Free Software
019: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020: *
021: * Redistribution and use of this software and associated documentation ("Software"),
022: * with or without modification, are permitted provided that the following conditions are met:
023: * 1. Redistributions of source code must retain copyright statements and notices.
024: * Redistributions must also contain a copy of this document.
025: * 2. Redistributions in binary form must reproduce the above copyright notice,
026: * this list of conditions and the following disclaimer in the documentation
027: * and/or other materials provided with the distribution.
028: * 3. The name "JAFFA" must not be used to endorse or promote products derived from
029: * this Software without prior written permission. For written permission,
030: * please contact mail to: jaffagroup@yahoo.com.
031: * 4. Products derived from this Software may not be called "JAFFA" nor may "JAFFA"
032: * appear in their names without prior written permission.
033: * 5. Due credit should be given to the JAFFA Project (http://jaffa.sourceforge.net).
034: *
035: * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
036: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046: * SUCH DAMAGE.
047: * ====================================================================
048: */
049:
050: package org.jaffa.metadata;
051:
052: import java.util.*;
053:
054: /** This class has helper routines for the domain meta objects.
055: */
056: public class DomainMetaDataHelper {
057:
058: /** Returns an array of attributes defined in a domain meta object.
059: * @param fieldMap A Map containing key-ed by attribute names.
060: * @return an array of attributes defined in a domain meta object.
061: */
062: public static String[] getAttributes(Map fieldMap) {
063: if (fieldMap.isEmpty()) {
064: return null;
065: } else {
066: String[] fields = new String[fieldMap.size()];
067: int i = 0;
068: for (Iterator itr = fieldMap.keySet().iterator(); itr
069: .hasNext(); i++)
070: fields[i] = (String) itr.next();
071: return fields;
072: }
073: }
074:
075: /** Returns an array of FieldMetaData objects defined in a domain meta object.
076: * @param fieldMap A Map containing a Collection of FieldMetaData objects.
077: * @return an array of FieldMetaData objects defined in a domain meta object.
078: */
079: public static FieldMetaData[] getFieldMetaData(Map fieldMap) {
080: if (fieldMap.isEmpty()) {
081: return null;
082: } else {
083: FieldMetaData[] fields = new FieldMetaData[fieldMap.size()];
084: int i = 0;
085: for (Iterator itr = fieldMap.values().iterator(); itr
086: .hasNext(); i++)
087: fields[i] = (FieldMetaData) itr.next();
088: return fields;
089: }
090: }
091:
092: /** Returns a FieldMetaData object defined in a domain meta object for the input field.
093: * @param fieldMap A Map containing a Collection of FieldMetaData objects, key-ed by attribute names.
094: * @param fieldName the name of the attribute.
095: * @return a FieldMetaData object defined in a domain meta object for the input field.
096: */
097: public static FieldMetaData getFieldMetaData(Map fieldMap,
098: String fieldName) {
099: Object field = fieldMap.get(fieldName);
100: if (field != null)
101: return (FieldMetaData) field;
102: else
103: return null;
104: }
105:
106: }
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