package org.unicode.cldr.unittest;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;

import org.unicode.cldr.unittest.TestAll.TestInfo;
import org.unicode.cldr.util.CLDRFile;
import org.unicode.cldr.util.DtdType;
import org.unicode.cldr.util.ElementAttributeInfo;
import org.unicode.cldr.util.XPathParts;

import com.ibm.icu.impl.Relation;
import com.ibm.icu.impl.Row;
import com.ibm.icu.impl.Row.R2;
import com.ibm.icu.impl.Row.R3;
import com.ibm.icu.impl.Utility;

public class TestDTDAttributes extends TestFmwkPlus {

    static TestInfo testInfo = TestInfo.getInstance();

    /**
     * Simple test that loads each file in the cldr directory, thus verifying
     * that the DTD works, and also checks that the PrettyPaths work.
     *
     * @author markdavis
     */

    public static void main(String[] args) {
        new TestDTDAttributes().run(args);
    }

    public void TestOrdering() { // Not deemed to be a useful test at this time
        // - JCE
        return;
        // for (DtdType type : DtdType.values()) {
        // checkOrdering(type);
        // }
    }

    private void checkOrdering(DtdType type) {
        Relation<String, String> toChildren = ElementAttributeInfo.getInstance(
            type).getElement2Children();
        // Relation<String, String> toParents =
        // ElementAttributeInfo.getElement2Parents(type);
        Set<String> containsOrdered = new LinkedHashSet<String>();
        for (String element : toChildren.keySet()) {
            int ordered = 0;
            Set<String> containedElements = toChildren.getAll(element);
            for (String contained : containedElements) {
                if (contained.equals("cp"))
                    continue;
                int currentOrdered = CLDRFile.isOrdered(contained, null) ? 1
                    : -1;
                if (currentOrdered > 0) {
                    containsOrdered.add(element);
                }
                if (ordered == 0) {
                    ordered = currentOrdered;
                } else {
                    if (ordered != currentOrdered) {
                        String error = type + "\tMixed ordering inside\t"
                            + element + ":\tordered:\t";
                        for (String contained2 : containedElements) {
                            if (contained.equals("cp")
                                || !CLDRFile.isOrdered(contained2, null))
                                continue;
                            error += " " + contained2;
                        }
                        error += ":\tunordered:\t";
                        for (String contained2 : containedElements) {
                            if (contained.equals("cp")
                                || CLDRFile.isOrdered(contained2, null))
                                continue;
                            error += " " + contained2;
                        }
                        errln(error);
                        break;
                    }
                }
            }
        }
        if (containsOrdered.size() != 0) {
            logln("                  " + "// DTD: " + type);
            for (String element : containsOrdered) {
                logln("                  " + "// <" + element + "> children");
                StringBuilder line = new StringBuilder("                  ");
                for (String contained : toChildren.getAll(element)) {
                    line.append("\"" + contained + "\", ");
                }
                logln(line.toString());
            }
        }
    }

    public void TestDistinguishing() {
        for (DtdType type : DtdType.values()) {
            if (type == DtdType.ldmlICU) {
                continue;
            }
            showDistinguishing(type);
        }
    }

    private void showDistinguishing(DtdType dtdType) {
        Relation<String, String> elementToAttributes = ElementAttributeInfo
            .getInstance(dtdType).getElement2Attributes();
        Relation<String, String> distinguishingAttributeToElements = Relation
            .<String, String> of(new TreeMap<String, Set<String>>(),
                TreeSet.class);
        Relation<String, String> nondistinguishingAttributeToElements = Relation
            .<String, String> of(new TreeMap<String, Set<String>>(),
                TreeSet.class);
        Relation<String, String> orderedAttributeToElements = Relation
            .<String, String> of(new TreeMap<String, Set<String>>(),
                TreeSet.class);
        Map<R2<String, String>, R3<Set<String>, String, String>> attributeData = ElementAttributeInfo
            .getInstance(dtdType).getElementAttribute2Data();

        for (String element : elementToAttributes.keySet()) {
            boolean isOrdered = CLDRFile.isOrdered(element, dtdType);
            Set<String> attributes = elementToAttributes.getAll(element);
            for (String attribute : attributes) {
                if (isOrdered) {
                    orderedAttributeToElements.put(attribute, element);
                }
                if (CLDRFile.isDistinguishing(dtdType, element, attribute)) {
                    distinguishingAttributeToElements.put(attribute, element);
                } else {
                    nondistinguishingAttributeToElements
                    .put(attribute, element);
                }
            }
        }

        // distinguishing elements should be required
        // make exception for alt
        for (String attribute : distinguishingAttributeToElements.keySet()) {
            if (attribute.equals("alt"))
                continue;
            for (String element : distinguishingAttributeToElements
                .getAll(attribute)) {
                R3<Set<String>, String, String> attributeInfo = attributeData
                    .get(Row.of(element, attribute));
                if (!"REQUIRED".equals(attributeInfo.get1())) {
                    logln(dtdType
                        + "\t"
                        + element
                        + "\t"
                        + attribute
                        + "\tDistinguishing attribute, but not REQUIRED in DTD");
                }
            }
        }

        Set<String> nondistinguishing = new TreeSet<String>(
            nondistinguishingAttributeToElements.keySet());
        nondistinguishing.removeAll(distinguishingAttributeToElements.keySet());
        logln("// " + dtdType + "\tnondistinguishing: " + nondistinguishing);

        Set<String> distinguishing = new TreeSet<String>(
            distinguishingAttributeToElements.keySet());
        nondistinguishing.removeAll(nondistinguishingAttributeToElements
            .keySet());
        logln("// " + dtdType + "\tdistinguishing: " + distinguishing);

        Set<String> both = new TreeSet<String>(
            distinguishingAttributeToElements.keySet());
        both.retainAll(nondistinguishingAttributeToElements.keySet());
        logln("// " + dtdType + "\tboth: " + both);

        for (String attribute : distinguishing) {
            logln("{\"" + "dist" + "\", \"" + dtdType + "\", \"" + "*"
                + "\", \"" + attribute + "\"},");
        }
        for (String attribute : both) {
            for (String element : nondistinguishingAttributeToElements
                .getAll(attribute)) {
                logln("{\"" + "nondist" + "\", \"" + dtdType + "\", \""
                    + element + "\", \"" + attribute + "\"},");
            }
        }
    }

    public void TestAttributes() {
        checkAttributes(DtdType.ldml, DtdType.supplementalData);
        checkAttributes(DtdType.ldml, DtdType.ldmlBCP47);
        checkAttributes(DtdType.ldmlBCP47, DtdType.supplementalData);
    }

    private void checkAttributes(DtdType dtdType1, DtdType dtdType2) {
        Map<R2<String, String>, R3<Set<String>, String, String>> mainData = ElementAttributeInfo
            .getInstance(dtdType1).getElementAttribute2Data();
        Map<R2<String, String>, R3<Set<String>, String, String>> suppData = ElementAttributeInfo
            .getInstance(dtdType2).getElementAttribute2Data();
        Set<R2<String, String>> commonKeys = getCommon(mainData.keySet(),
            suppData.keySet(), new TreeSet<R2<String, String>>());
        Set<R2<String, String>> same = new TreeSet<R2<String, String>>();
        for (R2<String, String> key : commonKeys) {
            R3<Set<String>, String, String> mainValue = mainData.get(key);
            R3<Set<String>, String, String> suppValue = suppData.get(key);
            if (mainValue.equals(suppValue)) {
                same.add(key);
            } else {
                errln("Different attribute properties across DTDs"
                    + key.toString() + "\t" + dtdType1.toString() + ":\t"
                    + mainValue.toString() + "\t" + dtdType2.toString()
                    + ":\t" + suppValue.toString());
            }
        }
        for (R2<String, String> key : same) {
            logln(dtdType1 + " and " + dtdType2 + ":\t" + key + "\t"
                + mainData.get(key));
        }
        for (R2<String, String> key : mainData.keySet()) {
            if (commonKeys.contains(key))
                continue;
            logln(dtdType1 + ":\t" + key + "\t" + mainData.get(key));
        }
        for (R2<String, String> key : suppData.keySet()) {
            if (commonKeys.contains(key))
                continue;
            logln(dtdType2 + ":\t" + key + "\t" + suppData.get(key));
        }
    }

    @SuppressWarnings({ "rawtypes", "unchecked" })
    private <T extends Collection> T getCommon(T a, T b, T result) {
        result.addAll(a);
        result.retainAll(b);
        return result;
    }

    public void TestElements() { // Not deemed to be a useful test at this time
        // - JCE
        // checkElements(DtdType.ldml, DtdType.supplementalData);
        // checkElements(DtdType.ldml, DtdType.ldmlBCP47);
        // checkElements(DtdType.ldmlBCP47, DtdType.supplementalData);
    }

    private void checkElements(DtdType dtdType1, DtdType dtdType2) {
        Relation<String, String> mainData = ElementAttributeInfo.getInstance(
            dtdType1).getElement2Children();
        Relation<String, String> suppData = ElementAttributeInfo.getInstance(
            dtdType2).getElement2Children();
        Set<String> commonKeys = getCommon(mainData.keySet(),
            suppData.keySet(), new TreeSet<String>());
        Set<String> same = new TreeSet<String>();
        for (String key : commonKeys) {
            Set<String> mainValues = mainData.getAll(key);
            Set<String> suppValues = suppData.getAll(key);
            if (mainValues.equals(suppValues)) {
                same.add(key);
                continue;
            }
            errln("DTD elements have different children\t" + key + "\t"
                + dtdType1 + ":\t" + mainValues + "\t" + dtdType2 + ":\t"
                + suppValues);
        }
        for (String key : same) {
            logln(dtdType1 + " and " + dtdType2 + ":\t" + key + "\t"
                + mainData.getAll(key));
        }
        for (String key : mainData.keySet()) {
            if (commonKeys.contains(key))
                continue;
            logln(dtdType1 + ":\t" + key + "\t" + mainData.getAll(key));
        }
        for (String key : suppData.keySet()) {
            if (commonKeys.contains(key))
                continue;
            logln(dtdType2 + ":\t" + key + "\t" + suppData.getAll(key));
        }
    }

    public void TestEmpty() { // not deemed to be a useful test at this time -
        // JCE
        // for (DtdType type : DtdType.values()) {
        // checkEmpty(type);
        // }
    }

    static final Set<String> COLLATION_SINGLETONS = new HashSet<String>(
        Arrays.asList(new String[] { "first_non_ignorable",
            "first_primary_ignorable", "first_secondary_ignorable",
            "first_tertiary_ignorable", "first_trailing",
            "first_variable", "last_non_ignorable",
            "last_primary_ignorable", "last_secondary_ignorable",
            "last_tertiary_ignorable", "last_trailing last_variable",
            "last_trailing", "last_variable" }));

    private void checkEmpty(DtdType type) {
        Relation<String, String> mainData = ElementAttributeInfo.getInstance(
            type).getElement2Parents();
        Relation<String, String> elementToAttributes = ElementAttributeInfo
            .getInstance(type).getElement2Attributes();
        Map<R2<String, String>, R3<Set<String>, String, String>> eaData = ElementAttributeInfo
            .getInstance(type).getElementAttribute2Data();

        Set<String> empties = mainData.getAll("EMPTY");
        for (String empty : empties) {
            if (COLLATION_SINGLETONS.contains(empty))
                continue;
            Set<String> attributes = elementToAttributes.getAll(empty);
            if (attributes == null) {
                errln("Is EMPTY but no attributes:\t" + type + ", " + empty);
                continue;
            }
            for (String attribute : attributes) {
                if (attribute.equals("draft") || attribute.equals("references"))
                    continue;
                logln(type + ", " + empty + ", " + attribute + ", "
                    + eaData.get(Row.of(empty, attribute)));
            }
        }
    }

    public void TestLeaf() { // Not deemed to be a useful test at this time -
        // JCE
        // for (DtdType type : DtdType.values()) {
        // checkLeaf(type, "PCDATA");
        // }
    }

    private void checkLeaf(DtdType type, String contained) {
        Relation<String, String> mainData = ElementAttributeInfo.getInstance(
            type).getElement2Parents();
        Relation<String, String> elementToAttributes = ElementAttributeInfo
            .getInstance(type).getElement2Attributes();
        Map<R2<String, String>, R3<Set<String>, String, String>> eaData = ElementAttributeInfo
            .getInstance(type).getElementAttribute2Data();

        Set<String> data = mainData.getAll(contained);
        if (data == null)
            return;
        for (String element : data) {
            Set<String> attributes = elementToAttributes.getAll(element);
            if (attributes == null) {
                logln(type + ", " + contained + ", " + element
                    + ", No attributes!");
                continue;
            }
            for (String attribute : attributes) {
                if (attribute.equals("draft") || attribute.equals("references"))
                    continue;
                logln(type + ", " + contained + ", " + element + ", "
                    + attribute + ", "
                    + eaData.get(Row.of(element, attribute)));
            }
        }
    }

    public void TestZNodeData() { // Not deemed to be a useful test at this time
        // - JCE
        // for (DtdType type : DtdType.values()) {
        // checkNodeData(type);
        // }
    }

    public void checkNodeData(DtdType type) {
        CurrentData.NodeData data = CurrentData.fullNodeData.get(type);
        Relation<String, String> element2Parents = ElementAttributeInfo
            .getInstance(type).getElement2Parents();
        Relation<String, String> element2Children = ElementAttributeInfo
            .getInstance(type).getElement2Children();
        Relation<String, String> elementToAttributes = data.elementToAttributes;

        Relation<String, String> dtdElementToAttributes = ElementAttributeInfo
            .getInstance(type).getElement2Attributes();
        Map<R2<String, String>, R3<Set<String>, String, String>> attributeData = ElementAttributeInfo
            .getInstance(type).getElementAttribute2Data();

        Set<String> possibleElements = dtdElementToAttributes.keySet();
        Set<String> foundElements = elementToAttributes.keySet();
        if (!foundElements.equals(possibleElements)) {
            Set<String> missing = new TreeSet<String>(possibleElements);
            missing.removeAll(foundElements);
            errln(type + "\t" + "Elements defined but not in data:\t" + missing);
        }

        // attributes not found
        for (String element : dtdElementToAttributes.keySet()) {
            Set<String> dtdAttributes = dtdElementToAttributes.getAll(element);
            Set<String> actualAttributes = remove_q(elementToAttributes
                .getAll(element));
            Set<String> attributesAlwaysFound = remove_q(data.elementToAttributesAlwaysFound
                .getAll(element));

            if (!dtdAttributes.containsAll(actualAttributes)
                || !dtdAttributes.containsAll(attributesAlwaysFound)) {
                errln(type + "\t"
                    + "Actual attributes exceed DTD attributes:\t" + type
                    + ", " + element + ", " + dtdAttributes + ", "
                    + actualAttributes + ", " + attributesAlwaysFound);
            }

            Set<String> notFound = new TreeSet<String>(dtdAttributes);
            notFound.removeAll(actualAttributes);
            notFound.remove("draft");
            notFound.remove("references");
            notFound.remove("standard");
            notFound.remove("alt");
            notFound.remove("validSubLocales");
            if (notFound.size() != 0) {
                warnln(type + "\tAttributes not found for:\t" + element
                    + "\tnotFound:\t" + notFound + "\tfound:\t"
                    + actualAttributes);
            }

            for (String attributeAlwaysFound : attributesAlwaysFound) {
                // make sure REQUIRED; not really an error, but for now...
                R3<Set<String>, String, String> attributeDatum = attributeData
                    .get(Row.of(element, attributeAlwaysFound));
                if (attributeDatum == null) {
                    errln(type + "\tData not found for " + type + ", "
                        + element + ", " + attributeAlwaysFound);
                    continue;
                }
                if (!"#REQUIRED".equals(attributeDatum.get1())) {
                    if (attributeDatum.get1() == null) {
                        warnln(type
                            + "\tAttribute not REQUIRED but ALWAYS found, element:\t"
                            + element + "\tattribute:\t"
                            + attributeAlwaysFound);
                    }
                }
            }
        }

        Set<String> empties = element2Parents.getAll("EMPTY");

        Set<String> overlap = getCommon(data.valueNodes.keySet(),
            data.branchNodes.keySet(), new TreeSet<String>());
        for (String s : overlap) {
            warnln(type + "\tOverlap in value and branch!!\t" + s
                + "\tvalue:\t" + data.valueNodes.get(s) + "\tbranch:\t"
                + data.branchNodes.get(s));
        }
        for (String s : data.valueNodes.keySet()) {
            if (overlap.contains(s))
                continue;
            logln(type + "\tLeaf:\t" + s + "\t\t" + data.valueNodes.get(s));
        }
        for (String s : data.branchNodes.keySet()) {
            if (overlap.contains(s))
                continue;
            logln(type + "\tBranch:\t" + s + "\t\t" + data.branchNodes.get(s));
        }

        overlap = getCommon(data.valueNodes.keySet(),
            data.valuelessNodes.keySet(), new TreeSet<String>());
        for (String s : overlap) {
            warnln(type + "\tOverlap in value and valueless!!\t" + s
                + "\tvalue:\t" + data.valueNodes.get(s) + "\tvalueless:\t"
                + data.valuelessNodes.get(s));
        }

        for (String s : data.valueNodes.keySet()) {
            if (overlap.contains(s))
                continue;
            logln(type + "\tValue:\t" + s + "\t\t" + data.valueNodes.get(s));
        }
        for (String s : data.valuelessNodes.keySet()) {
            if (overlap.contains(s))
                continue;
            logln(type + "\tValueless:\t" + s + "\t\t"
                + data.valuelessNodes.get(s));
            Set<String> containing = element2Children.getAll(s);
            if (!empties.contains(s) && containing.contains("PCDATA")) {
                errln(type + "\t***Should be empty in DTD but isn't:\t" + s
                    + "\t" + containing);
            }
        }
    }

    private Set<String> remove_q(Set<String> actualAttributes) {
        if (actualAttributes == null) {
            actualAttributes = Collections.emptySet();
        } else if (actualAttributes.contains("_q")) {
            actualAttributes = new LinkedHashSet<String>(actualAttributes);
            actualAttributes.remove("_q");
        }
        return actualAttributes;
    }

    static class CurrentData {
        static class NodeData {
            final DtdType myType;
            Map<String, R2<String, String>> branchNodes = new TreeMap<String, R2<String, String>>();
            Map<String, R3<String, String, String>> valueNodes = new TreeMap<String, R3<String, String, String>>();
            Map<String, R2<String, String>> valuelessNodes = new TreeMap<String, R2<String, String>>();
            Relation<String, String> elementToAttributes = Relation
                .<String, String> of(new TreeMap<String, Set<String>>(),
                    TreeSet.class);
            Relation<String, String> elementToAttributesAlwaysFound = Relation
                .<String, String> of(new TreeMap<String, Set<String>>(),
                    TreeSet.class);

            NodeData(DtdType type) {
                myType = type;
            }
        }

        static Map<DtdType, NodeData> fullNodeData = new HashMap<DtdType, NodeData>();
        static {
            XPathParts parts = new XPathParts();
            for (String locale : testInfo.getCldrFactory().getAvailable()) {
                CLDRFile file = testInfo.getCLDRFile(locale, false);
                NodeData nodeData = null;
                for (String xpath : file) {
                    String value = file.getStringValue(xpath);
                    String fullXpath = file.getFullXPath(xpath);
                    parts.set(fullXpath);
                    if (nodeData == null) {
                        String root = parts.getElement(0);
                        DtdType type = DtdType.valueOf(root);
                        nodeData = fullNodeData.get(type);
                        if (nodeData == null) {
                            fullNodeData.put(type, nodeData = new NodeData(
                                type));
                        }
                    }
                    int last = parts.size() - 1;
                    String element = null;
                    for (int i = 0; i <= last; ++i) {
                        element = parts.getElement(i);
                        Collection<String> attributes = parts
                            .getAttributeKeys(i);
                        nodeData.elementToAttributes.putAll(element,
                            attributes);
                        Set<String> oldAlways = nodeData.elementToAttributesAlwaysFound
                            .getAll(element);
                        if (oldAlways == null) {
                            nodeData.elementToAttributesAlwaysFound.putAll(
                                element, attributes);
                        } else {
                            // need retainAll, removeAll
                            for (String old : new TreeSet<String>(oldAlways)) {
                                if (!attributes.contains(old)) {
                                    nodeData.elementToAttributesAlwaysFound
                                    .remove(element, old);
                                }
                            }
                        }
                        if (i != last) {
                            putIfNew(nodeData.branchNodes, element, locale,
                                xpath);
                        } else {
                            if (value.length() > 0) {
                                putIfNew(nodeData.valueNodes, element,
                                    value, locale, xpath);
                            } else {
                                putIfNew(nodeData.valuelessNodes, element,
                                    locale, xpath);
                            }
                        }
                    }
                }
            }
        }

        static void putIfNew(Map<String, R2<String, String>> map, String key,
            String locale, String xpath) {
            if (!map.containsKey(key)) {
                map.put(key, Row.of(locale, xpath));
            }
        }

        static void putIfNew(Map<String, R3<String, String, String>> map,
            String key, String value, String locale, String xpath) {
            if (!map.containsKey(key)) {
                if (value.length() > 30)
                    value = value.substring(0, 30) + "...";
                value = value.replace("\n", "\\n");
                map.put(key, Row.of(value, locale, xpath));
            }
        }
    }

    // public void TestStructure() {
    // for (DtdType type : DtdType.values()) {
    // logln("*= distinguished, \u2021=ordered, \u2020=default");
    // Relation<String, String> toChildren =
    // ElementAttributeInfo.getInstance(type).getElement2Children();
    // Relation<String, String> toAttributes =
    // ElementAttributeInfo.getInstance(type).getElement2Attributes();
    // Map<R2<String, String>, R3<Set<String>, String, String>> toAttributeData
    // = ElementAttributeInfo
    // .getInstance(type).getElementAttribute2Data();
    // checkStructure(type, type.toString(), 0, toChildren, toAttributes,
    // toAttributeData);
    // }
    // }

    private void checkStructure(
        DtdType dtdType,
        String element,
        int indent,
        Relation<String, String> toChildren,
        Relation<String, String> toAttributes,
        Map<R2<String, String>, R3<Set<String>, String, String>> toAttributeData) {
        Set<String> myChildren = toChildren.getAll(element);
        String values = "";
        boolean skipChildren = false;
        if (myChildren != null) {
            if (myChildren.contains("PCDATA")) {
                values = "\tVALUE=" + myChildren.toString();
                skipChildren = true;
            } else if (myChildren.contains("EMPTY")) {
                // values = ";\t\tVALUE=" + myChildren.toString();
                skipChildren = true;
            }
        }
        String elementName = element;
        if (CLDRFile.isOrdered(element, dtdType)) {
            elementName += "\u2021";
        }
        logln(Utility.repeat("\t", indent)
            + elementName
            + checkAttributeStructure(dtdType, element,
                toAttributes.getAll(element), toAttributeData) + values);
        if (myChildren == null || skipChildren)
            return;
        for (String child : myChildren) {
            checkStructure(dtdType, child, indent + 1, toChildren,
                toAttributes, toAttributeData);
        }
    }

    private String checkAttributeStructure(
        DtdType dtdType, String element,
        Set<String> attributes,
        Map<R2<String, String>, R3<Set<String>, String, String>> toAttributeData) {
        if (attributes == null)
            return "";
        String result = "";
        for (String attribute : attributes) {
            if (attribute.equals("alt") || attribute.equals("draft")
                || attribute.equals("standard")
                || attribute.equals("references"))
                continue;
            if (result.length() != 0)
                result += "\t";
            R3<Set<String>, String, String> data = toAttributeData.get(Row.of(
                element, attribute));
            if (CLDRFile.isDistinguishing(dtdType, element, attribute)) {
                attribute += "*";
            }
            attribute += "="
                + formatForAttribute(data.get0(), data.get1(), data.get2());
            result += attribute;
        }
        if (result.length() == 0)
            return result;
        return "\t" + result;
        // draft, standard, references, alt
    }

    private String formatForAttribute(Set<String> type, String mode,
        String value) {
        String first = type.iterator().next();
        String typeName = attributeTypes.contains(first) ? first : type
            .toString();
        if (mode == null) {
            if (value == null) {
                throw new IllegalArgumentException(type + ", " + mode + ", "
                    + value);
            }
            return typeName.replace(value, value + "\u2020");
        }
        if (mode.equals("#FIXED"))
            return value;
        if (value != null) {
            throw new IllegalArgumentException(type + ", " + mode + ", "
                + value);
        }
        if (mode.equals("#REQUIRED")) {
            return typeName;
        }
        if (mode.equals("#IMPLIED")) {
            return typeName + "?";
        }
        throw new IllegalArgumentException(type + ", " + mode + ", " + value);
    }

    static Set<String> attributeTypes = new HashSet<String>(
        Arrays.asList(new String[] { "CDATA", "ID", "IDREF", "IDREFS",
            "ENTITY", "ENTITIES", "NMTOKEN", "NMTOKENS" }));

    static Set<String> attributeMode = new HashSet<String>(
        Arrays.asList(new String[] { "#REQUIRED", "#IMPLIED", "#FIXED" }));
}
