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package com.sun.xml.internal.org.relaxng.datatype.helpers;

import com.sun.xml.internal.org.relaxng.datatype.*;

/**

 * Dummy implementation of {@link DatatypeStreamingValidator}.

 *

 * <p>

 * This implementation can be used as a quick hack when the performance

 * of streaming validation is not important. And this implementation

 * also shows you how to implement the DatatypeStreamingValidator interface.

 *

 * <p>

 * Typical usage would be:

 * class MyDatatype implements Datatype {

 *     ....

 *     public DatatypeStreamingValidator createStreamingValidator( ValidationContext context ) {

 *         return new StreamingValidatorImpl(this,context);

 *     }

 *     ....

 * }

 *

 * @author <a href="mailto:kohsuke.kawaguchi@sun.com">Kohsuke KAWAGUCHI</a>

 */

public final class StreamingValidatorImpl implements DatatypeStreamingValidator {

        /** This buffer accumulates characters. */

        private final StringBuffer buffer = new StringBuffer();

        /** Datatype obejct that creates this streaming validator. */

        private final Datatype baseType;

        /** The current context. */

        private final ValidationContext context;

        public void addCharacters( char[] buf, int start, int len ) {

                // append characters to the current buffer.

                buffer.append(buf,start,len);

        }

        public boolean isValid() {

                return baseType.isValid(buffer.toString(),context);

        }

        public void checkValid() throws DatatypeException {

                baseType.checkValid(buffer.toString(),context);

        }

        public StreamingValidatorImpl( Datatype baseType, ValidationContext context ) {

                this.baseType = baseType;

                this.context = context;

        }

}