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Java example source code file (ListDV.java)

This example Java source code file (ListDV.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstractlist, index, indexoutofboundsexception, invaliddatatypevalueexception, listdata, listdv, object, objectlist, stringbuffer, typevalidator, util, validationcontext

The ListDV.java Java example source code

/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * Copyright 2001,2002,2004,2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.impl.dv.xs;

import java.util.AbstractList;

import com.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
import com.sun.org.apache.xerces.internal.impl.dv.ValidationContext;
import com.sun.org.apache.xerces.internal.xs.datatypes.ObjectList;

/**
 * Represent the schema list types
 *
 * @xerces.internal
 *
 * @author Neeraj Bajaj, Sun Microsystems, inc.
 * @author Sandy Gao, IBM
 *
 * @version $Id: ListDV.java,v 1.7 2010-11-01 04:39:47 joehw Exp $
 */
public class ListDV extends TypeValidator{

    public short getAllowedFacets(){
          return (XSSimpleTypeDecl.FACET_LENGTH | XSSimpleTypeDecl.FACET_MINLENGTH | XSSimpleTypeDecl.FACET_MAXLENGTH | XSSimpleTypeDecl.FACET_PATTERN | XSSimpleTypeDecl.FACET_ENUMERATION | XSSimpleTypeDecl.FACET_WHITESPACE );
    }

    // this method should never be called: XSSimpleTypeDecl is responsible for
    // calling the item type for the convertion
    public Object getActualValue(String content, ValidationContext context) throws InvalidDatatypeValueException{
        return content;
    }

    // length of a list type is the number of items in the list
    public int getDataLength(Object value) {
        return ((ListData)value).getLength();
    }

    final static class ListData extends AbstractList implements ObjectList {
        final Object[] data;
        private String canonical;
        public ListData(Object[] data) {
            this.data = data;
        }
        public synchronized String toString() {
            if (canonical == null) {
                int len = data.length;
                StringBuffer buf = new StringBuffer();
                if (len > 0) {
                    buf.append(data[0].toString());
                }
                for (int i = 1; i < len; i++) {
                    buf.append(' ');
                    buf.append(data[i].toString());
                }
                canonical = buf.toString();
            }
            return canonical;
        }
        public int getLength() {
            return data.length;
        }
        public boolean equals(Object obj) {
            if (!(obj instanceof ListData))
                return false;
            Object[] odata = ((ListData)obj).data;

            int count = data.length;
            if (count != odata.length)
                return false;

            for (int i = 0 ; i < count ; i++) {
                if (!data[i].equals(odata[i]))
                    return false;
            }//end of loop

            //everything went fine.
            return true;
        }

        public int hashCode() {
            int hash = 0;
            for (int i = 0; i < data.length; ++i) {
                hash ^= data[i].hashCode();
            }
            return hash;
        }

        public boolean contains(Object item) {
            for (int i = 0;i < data.length; i++) {
                if (item == data[i]) {
                    return true;
                }
            }
            return false;
        }

        public Object item(int index) {
            if (index < 0 || index >= data.length) {
                return null;
            }
            return data[index];
        }

        /*
         * List methods
         */

        public Object get(int index) {
            if (index >= 0 && index < data.length) {
                return data[index];
            }
            throw new IndexOutOfBoundsException("Index: " + index);
        }

        public int size() {
            return getLength();
        }
    }
} // class ListDV

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