001    /*
002     * Jpkg - Java library and tools for operating system package creation.
003     *
004     * Copyright (c) 2007 Three Rings Design, Inc.
005     * All rights reserved.
006     *
007     * Redistribution and use in source and binary forms, with or without
008     * modification, are permitted provided that the following conditions
009     * are met:
010     * 1. Redistributions of source code must retain the above copyright
011     *    notice, this list of conditions and the following disclaimer.
012     * 2. Redistributions in binary form must reproduce the above copyright
013     *    notice, this list of conditions and the following disclaimer in the
014     *    documentation and/or other materials provided with the distribution.
015     * 3. Neither the name of the copyright owner nor the names of contributors
016     *    may be used to endorse or promote products derived from this software
017     *    without specific prior written permission.
018     *
019     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
020     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
021     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
022     * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
023     * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
024     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
025     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
026     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
027     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
028     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
029     * POSSIBILITY OF SUCH DAMAGE.
030     */
031    package com.threerings.antidote;
032    
033    import java.util.ArrayList;
034    import java.util.List;
035    
036    import org.apache.tools.ant.BuildException;
037    
038    /**
039     * Turns lists of {@link RequiresValidation} objects into a single {@link BuildException}
040     */
041     public class Validator
042    {
043         /**
044          * Add a {@link RequiresValidation} object to be reported by this Validator
045          */
046         public void addValidation (RequiresValidation validator)
047         {
048             _validators.add(validator);
049         }
050    
051         /**
052          * Validates all {@link RequiresValidation} objects known to this Validator, throwing a
053          * single {@link BuildException} for all detected violations.
054          * @throws BuildException
055          */
056         public void validateAll ()
057         {
058             final StringBuilder builder = new StringBuilder();
059             for (final RequiresValidation validator : _validators) {
060                 for (final Violation violation : validator.validate()) {
061                     if (builder.length() > 0) {
062                         builder.append("\n");
063                     }
064                     if (builder.length() == 0) {
065                         builder.append("Validation exceptions encountered:\n");
066                     }
067                     builder.append(violation.getLocation() + violation.getReason());
068                 }
069             }
070             if (builder.length() > 0) {
071                 throw new BuildException(builder.toString());
072             }
073         }
074    
075         private final List<RequiresValidation> _validators = new ArrayList<RequiresValidation>();
076    }