Java XSModelGroupImpl.MODELGROUP_CHOICE属性代码示例

protected void calcFirstPos(CMStateSet toSet) {
    if (type() == XSModelGroupImpl.MODELGROUP_CHOICE) {
        // Its the the union of the first positions of our children.
        toSet.setTo(fLeftChild.firstPos());
        toSet.union(fRightChild.firstPos());
    }
     else if (type() == XSModelGroupImpl.MODELGROUP_SEQUENCE) {
        //
        //  If our left child is nullable, then its the union of our
        //  children's first positions. Else is our left child's first
        //  positions.
        //
        toSet.setTo(fLeftChild.firstPos());
        if (fLeftChild.isNullable())
            toSet.union(fRightChild.firstPos());
    }
     else {
        throw new RuntimeException("ImplementationMessages.VAL_BST");
    }
}
 

protected void calcLastPos(CMStateSet toSet) {
    if (type() == XSModelGroupImpl.MODELGROUP_CHOICE) {
        // Its the the union of the first positions of our children.
        toSet.setTo(fLeftChild.lastPos());
        toSet.union(fRightChild.lastPos());
    }
    else if (type() == XSModelGroupImpl.MODELGROUP_SEQUENCE) {
        //
        //  If our right child is nullable, then its the union of our
        //  children's last positions. Else is our right child's last
        //  positions.
        //
        toSet.setTo(fRightChild.lastPos());
        if (fRightChild.isNullable())
            toSet.union(fLeftChild.lastPos());
    }
    else {
        throw new RuntimeException("ImplementationMessages.VAL_BST");
    }
}
 

private CMNode copyNode(CMNode node) {
    int type = node.type();
    // for choice or sequence, copy the two subtrees, and combine them
    if (type == XSModelGroupImpl.MODELGROUP_CHOICE ||
        type == XSModelGroupImpl.MODELGROUP_SEQUENCE) {
        XSCMBinOp bin = (XSCMBinOp)node;
        node = fNodeFactory.getCMBinOpNode(type, copyNode(bin.getLeft()),
                             copyNode(bin.getRight()));
    }
    // for ?+*, copy the subtree, and put it in a new ?+* node
    else if (type == XSParticleDecl.PARTICLE_ZERO_OR_MORE ||
             type == XSParticleDecl.PARTICLE_ONE_OR_MORE ||
             type == XSParticleDecl.PARTICLE_ZERO_OR_ONE) {
        XSCMUniOp uni = (XSCMUniOp)node;
        node = fNodeFactory.getCMUniOpNode(type, copyNode(uni.getChild()));
    }
    // for element/wildcard (leaf), make a new leaf node,
    // with a distinct position
    else if (type == XSParticleDecl.PARTICLE_ELEMENT ||
             type == XSParticleDecl.PARTICLE_WILDCARD) {
        XSCMLeaf leaf = (XSCMLeaf)node;
        node = fNodeFactory.getCMLeafNode(leaf.type(), leaf.getLeaf(), leaf.getParticleId(), fLeafCount++);
    }

    return node;
}
 

public XSCMBinOp(int type, CMNode leftNode, CMNode rightNode)
{
    super(type);

    // Insure that its one of the types we require
    if ((type() != XSModelGroupImpl.MODELGROUP_CHOICE)
    &&  (type() != XSModelGroupImpl.MODELGROUP_SEQUENCE)) {
        throw new RuntimeException("ImplementationMessages.VAL_BST");
    }

    // Store the nodes and init any data that needs it
    fLeftChild = leftNode;
    fRightChild = rightNode;
}
 

public boolean isNullable() {
    //
    //  If its an alternation, then if either child is nullable then
    //  this node is nullable. If its a concatenation, then both of
    //  them have to be nullable.
    //
    if (type() == XSModelGroupImpl.MODELGROUP_CHOICE)
        return (fLeftChild.isNullable() || fRightChild.isNullable());
    else if (type() == XSModelGroupImpl.MODELGROUP_SEQUENCE)
        return (fLeftChild.isNullable() && fRightChild.isNullable());
    else
        throw new RuntimeException("ImplementationMessages.VAL_BST");
}
 

/** Post tree build initialization. */
private void postTreeBuildInit(CMNode nodeCur) throws RuntimeException {
    // Set the maximum states on this node
    nodeCur.setMaxStates(fLeafCount);

    XSCMLeaf leaf = null;
    int pos = 0;
    // Recurse as required
    if (nodeCur.type() == XSParticleDecl.PARTICLE_WILDCARD) {
        leaf = (XSCMLeaf)nodeCur;
        pos = leaf.getPosition();
        fLeafList[pos] = leaf;
        fLeafListType[pos] = XSParticleDecl.PARTICLE_WILDCARD;
    }
    else if ((nodeCur.type() == XSModelGroupImpl.MODELGROUP_CHOICE) ||
             (nodeCur.type() == XSModelGroupImpl.MODELGROUP_SEQUENCE)) {
        postTreeBuildInit(((XSCMBinOp)nodeCur).getLeft());
        postTreeBuildInit(((XSCMBinOp)nodeCur).getRight());
    }
    else if (nodeCur.type() == XSParticleDecl.PARTICLE_ZERO_OR_MORE ||
             nodeCur.type() == XSParticleDecl.PARTICLE_ONE_OR_MORE ||
             nodeCur.type() == XSParticleDecl.PARTICLE_ZERO_OR_ONE) {
        postTreeBuildInit(((XSCMUniOp)nodeCur).getChild());
    }
    else if (nodeCur.type() == XSParticleDecl.PARTICLE_ELEMENT) {
        //  Put this node in the leaf list at the current index if its
        //  a non-epsilon leaf.
        leaf = (XSCMLeaf)nodeCur;
        pos = leaf.getPosition();
        fLeafList[pos] = leaf;
        fLeafListType[pos] = XSParticleDecl.PARTICLE_ELEMENT;
    }
    else {
        throw new RuntimeException("ImplementationMessages.VAL_NIICM");
    }
}
 

private CMNode buildSyntaxTree(XSParticleDecl particle, boolean optimize) {

        int maxOccurs = particle.fMaxOccurs;
        int minOccurs = particle.fMinOccurs;
        short type = particle.fType;
        CMNode nodeRet = null;

        if ((type == XSParticleDecl.PARTICLE_WILDCARD) ||
            (type == XSParticleDecl.PARTICLE_ELEMENT)) {
            // (task 1) element and wildcard particles should be converted to
            // leaf nodes
            // REVISIT: Make a clone of the leaf particle, so that if there
            // are two references to the same group, we have two different
            // leaf particles for the same element or wildcard decl.
            // This is useful for checking UPA.
            nodeRet = fNodeFactory.getCMLeafNode(particle.fType, particle.fValue, fParticleCount++, fLeafCount++);
            // (task 2) expand occurrence values
            nodeRet = expandContentModel(nodeRet, minOccurs, maxOccurs, optimize);
        }
        else if (type == XSParticleDecl.PARTICLE_MODELGROUP) {
            // (task 1,3) convert model groups to binary trees
            XSModelGroupImpl group = (XSModelGroupImpl)particle.fValue;
            CMNode temp = null;
            // when the model group is a choice of more than one particles, but
            // only one of the particle is not empty, (for example
            // <choice>
            //   <sequence/>
            //   <element name="e"/>
            // </choice>
            // ) we can't not return that one particle ("e"). instead, we should
            // treat such particle as optional ("e?").
            // the following boolean variable is true when there are at least
            // 2 non-empty children.
            boolean twoChildren = false;
            for (int i = 0; i < group.fParticleCount; i++) {
                // first convert each child to a CM tree
                temp = buildSyntaxTree(group.fParticles[i],
                        optimize &&
                        minOccurs == 1 && maxOccurs == 1 &&
                        (group.fCompositor == XSModelGroupImpl.MODELGROUP_SEQUENCE ||
                         group.fParticleCount == 1));
                // then combine them using binary operation
                if (temp != null) {
                    if (nodeRet == null) {
                        nodeRet = temp;
                    }
                    else {
                        nodeRet = fNodeFactory.getCMBinOpNode(group.fCompositor, nodeRet, temp);
                        // record the fact that there are at least 2 children
                        twoChildren = true;
                    }
                }
            }
            // (task 2) expand occurrence values
            if (nodeRet != null) {
                // when the group is "choice", there is only one non-empty
                // child, and the group had more than one children, we need
                // to create a zero-or-one (optional) node for the non-empty
                // particle.
                if (group.fCompositor == XSModelGroupImpl.MODELGROUP_CHOICE &&
                    !twoChildren && group.fParticleCount > 1) {
                    nodeRet = fNodeFactory.getCMUniOpNode(XSParticleDecl.PARTICLE_ZERO_OR_ONE, nodeRet);
                }
                nodeRet = expandContentModel(nodeRet, minOccurs, maxOccurs, false);
            }
        }

        return nodeRet;
    }
 

private CMNode buildCompactSyntaxTree(XSParticleDecl particle) {
    int maxOccurs = particle.fMaxOccurs;
    int minOccurs = particle.fMinOccurs;
    short type = particle.fType;
    CMNode nodeRet = null;

    if ((type == XSParticleDecl.PARTICLE_WILDCARD) ||
        (type == XSParticleDecl.PARTICLE_ELEMENT)) {
        return buildCompactSyntaxTree2(particle, minOccurs, maxOccurs);
    }
    else if (type == XSParticleDecl.PARTICLE_MODELGROUP) {
        XSModelGroupImpl group = (XSModelGroupImpl)particle.fValue;
        if (group.fParticleCount == 1 && (minOccurs != 1 || maxOccurs != 1)) {
            return buildCompactSyntaxTree2(group.fParticles[0], minOccurs, maxOccurs);
        }
        else {
            CMNode temp = null;

            // when the model group is a choice of more than one particles, but
            // only one of the particle is not empty, (for example
            // <choice>
            //   <sequence/>
            //   <element name="e"/>
            // </choice>
            // ) we can't not return that one particle ("e"). instead, we should
            // treat such particle as optional ("e?").
            // the following int variable keeps track of the number of non-empty children
            int count = 0;
            for (int i = 0; i < group.fParticleCount; i++) {
                // first convert each child to a CM tree
                temp = buildCompactSyntaxTree(group.fParticles[i]);
                // then combine them using binary operation
                if (temp != null) {
                    ++count;
                    if (nodeRet == null) {
                        nodeRet = temp;
                    }
                    else {
                        nodeRet = fNodeFactory.getCMBinOpNode(group.fCompositor, nodeRet, temp);
                    }
                }
            }
            if (nodeRet != null) {
                // when the group is "choice" and the group has one or more empty children,
                // we need to create a zero-or-one (optional) node for the non-empty particles.
                if (group.fCompositor == XSModelGroupImpl.MODELGROUP_CHOICE && count < group.fParticleCount) {
                    nodeRet = fNodeFactory.getCMUniOpNode(XSParticleDecl.PARTICLE_ZERO_OR_ONE, nodeRet);
                }
            }
        }
    }
    return nodeRet;
}