xswildcarddecl.java

来自「JAVA 所有包」· Java 代码 · 共 589 行 · 第 1/2 页

        // if the other wildcard is not expressible, the result is still not expressible
        if (wildcard == null)
            return null;

        // For a wildcard's {namespace constraint} value to be the intensional intersection of
        // two other such values (call them O1 and O2): the appropriate case among the following
        // must be true:

        XSWildcardDecl intersectWildcard = new XSWildcardDecl();
        intersectWildcard.fProcessContents = processContents;

        // 1 If O1 and O2 are the same value, then that value must be the value.
        if (areSame(wildcard)) {
            intersectWildcard.fType = fType;
            intersectWildcard.fNamespaceList = fNamespaceList;
        }

        // 2 If either O1 or O2 is any, then the other must be the value.
        else if ( (fType == NSCONSTRAINT_ANY) || (wildcard.fType == NSCONSTRAINT_ANY) ) {
            // both cannot be ANY, if we have reached here.
            XSWildcardDecl other = this;

            if (fType == NSCONSTRAINT_ANY)
                other = wildcard;

            intersectWildcard.fType = other.fType;
            intersectWildcard.fNamespaceList = other.fNamespaceList;
        }

        // -3 If either O1 or O2 is a pair of not and a namespace name and the other is a set of
        //    (namespace names or absent), then that set, minus the negated namespace name if
        //    it was in the set, must be the value.
        // +3 If either O1 or O2 is a pair of not and a namespace name and the other
        //    is a set of (namespace names or absent), then that set, minus the negated
        //    namespace name if it was in the set, then minus absent if it was in the
        //    set, must be the value.
        // * when we have not(list), the operation is just list-otherlist
        else if ( ((fType == NSCONSTRAINT_NOT) && (wildcard.fType == NSCONSTRAINT_LIST)) ||
                  ((fType == NSCONSTRAINT_LIST) && (wildcard.fType == NSCONSTRAINT_NOT)) ) {
            String[] list = null;
            String[] other = null;

            if (fType == NSCONSTRAINT_NOT) {
                other = fNamespaceList;
                list = wildcard.fNamespaceList;
            }
            else {
                other = wildcard.fNamespaceList;
                list = fNamespaceList;
            }

            int listSize = list.length;
            String[] intersect = new String[listSize];
            int newSize = 0;
            for (int i = 0; i < listSize; i++) {
                if (list[i] != other[0] && list[i] != ABSENT)
                    intersect[newSize++] = list[i];
            }

            intersectWildcard.fType = NSCONSTRAINT_LIST;
            intersectWildcard.fNamespaceList = new String[newSize];
            System.arraycopy(intersect, 0, intersectWildcard.fNamespaceList, 0, newSize);
        }

        // 4 If both O1 and O2 are sets of (namespace names or absent), then the intersection of those
        //   sets must be the value.
        else if ( (fType == NSCONSTRAINT_LIST) && (wildcard.fType == NSCONSTRAINT_LIST) ) {
            intersectWildcard.fType = NSCONSTRAINT_LIST;
            intersectWildcard.fNamespaceList = intersect2sets(fNamespaceList, wildcard.fNamespaceList);
        }

        // -5 If the two are negations of different namespace names, then the intersection is not expressible.
        // +5 If the two are negations of namespace names or absent, then The
        //    appropriate case among the following must be true:
        //    +5.1 If the two are negations of different namespace names, then the
        //         intersection is not expressible.
        //    +5.2 If one of the two is a pair of not and absent, the other must be
        //         the value.
        // * when we have not(list), the operation is just not(onelist+otherlist)
        else if (fType == NSCONSTRAINT_NOT && wildcard.fType == NSCONSTRAINT_NOT) {
            if (fNamespaceList[0] != ABSENT && wildcard.fNamespaceList[0] != ABSENT)
                return null;

            XSWildcardDecl other = this;
            if (fNamespaceList[0] == ABSENT)
                other = wildcard;

            intersectWildcard.fType = other.fType;
            intersectWildcard.fNamespaceList = other.fNamespaceList;
        }

        return intersectWildcard;

    } // performIntersectionWith

    private boolean areSame(XSWildcardDecl wildcard) {
        if (fType == wildcard.fType) {
            // ##any, true
            if (fType == NSCONSTRAINT_ANY)
                return true;

            // ##other, only check the negated value
            // * when we support not(list), we need to check in the same way
            //   as for NSCONSTRAINT_LIST.
            if (fType == NSCONSTRAINT_NOT)
                return fNamespaceList[0] == wildcard.fNamespaceList[0];

            // ## list, must have the same length,
            // and each item in one list must appear in the other one
            // (we are assuming that there are no duplicate items in a list)
            if (fNamespaceList.length == wildcard.fNamespaceList.length) {
                for (int i=0; i<fNamespaceList.length; i++) {
                    if (!elementInSet(fNamespaceList[i], wildcard.fNamespaceList))
                        return false;
                }
                return true;
            }
        }

        return false;
    } // areSame

    String[] intersect2sets(String[] one, String[] theOther){
        String[] result = new String[Math.min(one.length,theOther.length)];

        // simple implemention,
        int count = 0;
        for (int i=0; i<one.length; i++) {
            if (elementInSet(one[i], theOther))
                result[count++] = one[i];
        }

        String[] result2 = new String[count];
        System.arraycopy(result, 0, result2, 0, count);

        return result2;
    }

    String[] union2sets(String[] one, String[] theOther){
        String[] result1 = new String[one.length];

        // simple implemention,
        int count = 0;
        for (int i=0; i<one.length; i++) {
            if (!elementInSet(one[i], theOther))
                result1[count++] = one[i];
        }

        String[] result2 = new String[count+theOther.length];
        System.arraycopy(result1, 0, result2, 0, count);
        System.arraycopy(theOther, 0, result2, count, theOther.length);

        return result2;
    }

    boolean subset2sets(String[] subSet, String[] superSet){
        for (int i=0; i<subSet.length; i++) {
            if (!elementInSet(subSet[i], superSet))
                return false;
        }

        return true;
    }

    boolean elementInSet(String ele, String[] set){
        boolean found = false;
        for (int i=0; i<set.length && !found; i++) {
            if (ele==set[i])
                found = true;
        }

        return found;
    }

    /**
     * get the string description of this wildcard
     */
    private String fDescription = null;
    public String toString() {
        if (fDescription == null) {
            StringBuffer buffer = new StringBuffer();
            buffer.append("WC[");
            switch (fType) {
            case NSCONSTRAINT_ANY:
                buffer.append(SchemaSymbols.ATTVAL_TWOPOUNDANY);
                break;
            case NSCONSTRAINT_NOT:
                buffer.append(SchemaSymbols.ATTVAL_TWOPOUNDOTHER);
                buffer.append(":\"");
                if (fNamespaceList[0] != null)
                    buffer.append(fNamespaceList[0]);
                buffer.append("\"");
                break;
            case NSCONSTRAINT_LIST:
                if (fNamespaceList.length == 0)
                    break;
                buffer.append("\"");
                if (fNamespaceList[0] != null)
                    buffer.append(fNamespaceList[0]);
                buffer.append("\"");
                for (int i = 1; i < fNamespaceList.length; i++) {
                    buffer.append(",\"");
                    if (fNamespaceList[i] != null)
                        buffer.append(fNamespaceList[i]);
                    buffer.append("\"");
                }
                break;
            }
            buffer.append("]");
            fDescription = buffer.toString();
        }

        return fDescription;
    }
    
    /**
     * Get the type of the object, i.e ELEMENT_DECLARATION.
     */
    public short getType() {
        return XSConstants.WILDCARD;
    }

    /**
     * The <code>name</code> of this <code>XSObject</code> depending on the
     * <code>XSObject</code> type.
     */
    public String getName() {
        return null;
    }

    /**
     * The namespace URI of this node, or <code>null</code> if it is
     * unspecified.  defines how a namespace URI is attached to schema
     * components.
     */
    public String getNamespace() {
        return null;
    }

    /**
     * Namespace constraint: A constraint type: any, not, list.
     */
    public short getConstraintType() {
        return fType;
    }

    /**
     * Namespace constraint. For <code>constraintType</code>
     * LIST_NSCONSTRAINT, the list contains allowed namespaces. For
     * <code>constraintType</code> NOT_NSCONSTRAINT, the list contains
     * disallowed namespaces.
     */
    public StringList getNsConstraintList() {
        return new StringListImpl(fNamespaceList, fNamespaceList == null ? 0 : fNamespaceList.length);
    }

    /**
     * {process contents} One of skip, lax or strict. Valid constants values
     * are: PC_SKIP, PC_LAX, PC_STRICT.
     */
    public short getProcessContents() {
        return fProcessContents;
    }

    /**
     * String valid of {process contents}. One of "skip", "lax" or "strict".
     */
    public String getProcessContentsAsString() {
        switch (fProcessContents) {
            case XSWildcardDecl.PC_SKIP: return "skip";
            case XSWildcardDecl.PC_LAX: return "lax";
            case XSWildcardDecl.PC_STRICT: return "strict";
            default: return "invalid value";
        }
    }

    /**
     * Optional. Annotation.
     */
    public XSAnnotation getAnnotation() {
        return fAnnotation;
    }


	/**
	 * @see com.sun.org.apache.xerces.internal.xs.XSObject#getNamespaceItem()
	 */
	public XSNamespaceItem getNamespaceItem() {
        // REVISIT: implement
		return null;
	}

} // class XSWildcardDecl