| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999-2002 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xerces" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, International |
| * Business Machines, Inc., http://www.apache.org. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| package com.sun.org.apache.xerces.internal.impl.dtd.models; |
| |
| import com.sun.org.apache.xerces.internal.xni.QName; |
| |
| import com.sun.org.apache.xerces.internal.impl.dtd.XMLContentSpec; |
| |
| /** |
| * SimpleContentModel is a derivative of the abstract content model base |
| * class that handles a small set of simple content models that are just |
| * way overkill to give the DFA treatment. |
| * <p> |
| * This class handles the following scenarios: |
| * <ul> |
| * <li> a |
| * <li> a? |
| * <li> a* |
| * <li> a+ |
| * <li> a,b |
| * <li> a|b |
| * </ul> |
| * <p> |
| * These all involve a unary operation with one element type, or a binary |
| * operation with two elements. These are very simple and can be checked |
| * in a simple way without a DFA and without the overhead of setting up a |
| * DFA for such a simple check. |
| * |
| * @xerces.internal |
| * |
| */ |
| public class SimpleContentModel |
| implements ContentModelValidator { |
| |
| // |
| // Constants |
| // |
| |
| /** CHOICE */ |
| public static final short CHOICE = -1; |
| |
| /** SEQUENCE */ |
| public static final short SEQUENCE = -1; |
| |
| // |
| // Data |
| // |
| |
| |
| /** |
| * The element decl pool indices of the first (and optional second) |
| * child node. The operation code tells us whether the second child |
| * is used or not. |
| */ |
| private QName fFirstChild = new QName(); |
| |
| /** |
| * The element decl pool indices of the first (and optional second) |
| * child node. The operation code tells us whether the second child |
| * is used or not. |
| */ |
| private QName fSecondChild = new QName(); |
| |
| /** |
| * The operation that this object represents. Since this class only |
| * does simple contents, there is only ever a single operation |
| * involved (i.e. the children of the operation are always one or |
| * two leafs.) This is one of the XMLDTDParams.CONTENTSPECNODE_XXX values. |
| */ |
| private int fOperator; |
| |
| /* this is the EquivClassComparator object */ |
| //private EquivClassComparator comparator = null; |
| |
| |
| // |
| // Constructors |
| // |
| |
| /** |
| * Constructs a simple content model. |
| * |
| * @param operator The content model operator. |
| * @param firstChild qualified name of the first child |
| * @param secondChild qualified name of the second child |
| * |
| */ |
| public SimpleContentModel(short operator, QName firstChild, QName secondChild) { |
| // |
| // Store away the children and operation. This is all we need to |
| // do the content model check. |
| // |
| // The operation is one of the ContentSpecNode.NODE_XXX values! |
| // |
| fFirstChild.setValues(firstChild); |
| if (secondChild != null) { |
| fSecondChild.setValues(secondChild); |
| } |
| else { |
| fSecondChild.clear(); |
| } |
| fOperator = operator; |
| } |
| |
| // |
| // ContentModelValidator methods |
| // |
| |
| /** |
| * Check that the specified content is valid according to this |
| * content model. This method can also be called to do 'what if' |
| * testing of content models just to see if they would be valid. |
| * <p> |
| * A value of -1 in the children array indicates a PCDATA node. All other |
| * indexes will be positive and represent child elements. The count can be |
| * zero, since some elements have the EMPTY content model and that must be |
| * confirmed. |
| * |
| * @param children The children of this element. Each integer is an index within |
| * the <code>StringPool</code> of the child element name. An index |
| * of -1 is used to indicate an occurrence of non-whitespace character |
| * data. |
| * @param offset Offset into the array where the children starts. |
| * @param length The number of entries in the <code>children</code> array. |
| * |
| * @return The value -1 if fully valid, else the 0 based index of the child |
| * that first failed. If the value returned is equal to the number |
| * of children, then the specified children are valid but additional |
| * content is required to reach a valid ending state. |
| * |
| */ |
| public int validate(QName[] children, int offset, int length) { |
| |
| // |
| // According to the type of operation, we do the correct type of |
| // content check. |
| // |
| switch(fOperator) |
| { |
| case XMLContentSpec.CONTENTSPECNODE_LEAF : |
| // If there is not a child, then report an error at index 0 |
| if (length == 0) |
| return 0; |
| |
| // If the 0th child is not the right kind, report an error at 0 |
| if (children[offset].rawname != fFirstChild.rawname) { |
| return 0; |
| } |
| |
| // If more than one child, report an error at index 1 |
| if (length > 1) |
| return 1; |
| break; |
| |
| case XMLContentSpec.CONTENTSPECNODE_ZERO_OR_ONE : |
| // |
| // If there is one child, make sure its the right type. If not, |
| // then its an error at index 0. |
| // |
| if (length == 1) { |
| if (children[offset].rawname != fFirstChild.rawname) { |
| return 0; |
| } |
| } |
| |
| // |
| // If the child count is greater than one, then obviously |
| // bad, so report an error at index 1. |
| // |
| if (length > 1) |
| return 1; |
| break; |
| |
| case XMLContentSpec.CONTENTSPECNODE_ZERO_OR_MORE : |
| // |
| // If the child count is zero, that's fine. If its more than |
| // zero, then make sure that all children are of the element |
| // type that we stored. If not, report the index of the first |
| // failed one. |
| // |
| if (length > 0) |
| { |
| for (int index = 0; index < length; index++) { |
| if (children[offset + index].rawname != fFirstChild.rawname) { |
| return index; |
| } |
| } |
| } |
| break; |
| |
| case XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE : |
| // |
| // If the child count is zero, that's an error so report |
| // an error at index 0. |
| // |
| if (length == 0) |
| return 0; |
| |
| // |
| // Otherwise we have to check them all to make sure that they |
| // are of the correct child type. If not, then report the index |
| // of the first one that is not. |
| // |
| for (int index = 0; index < length; index++) { |
| if (children[offset + index].rawname != fFirstChild.rawname) { |
| return index; |
| } |
| } |
| break; |
| |
| case XMLContentSpec.CONTENTSPECNODE_CHOICE : |
| // |
| // There must be one and only one child, so if the element count |
| // is zero, return an error at index 0. |
| // |
| if (length == 0) |
| return 0; |
| |
| // If the zeroth element isn't one of our choices, error at 0 |
| if ((children[offset].rawname != fFirstChild.rawname) && |
| (children[offset].rawname != fSecondChild.rawname)) { |
| return 0; |
| } |
| |
| // If there is more than one element, then an error at 1 |
| if (length > 1) |
| return 1; |
| break; |
| |
| case XMLContentSpec.CONTENTSPECNODE_SEQ : |
| // |
| // There must be two children and they must be the two values |
| // we stored, in the stored order. |
| // |
| if (length == 2) { |
| if (children[offset].rawname != fFirstChild.rawname) { |
| return 0; |
| } |
| if (children[offset + 1].rawname != fSecondChild.rawname) { |
| return 1; |
| } |
| } |
| else { |
| if (length > 2) { |
| return 2; |
| } |
| |
| return length; |
| } |
| |
| break; |
| |
| default : |
| throw new RuntimeException("ImplementationMessages.VAL_CST"); |
| } |
| |
| // We survived, so return success status |
| return -1; |
| } // validate |
| |
| } // class SimpleContentModel |
