Examples of cc.redberry.core.context.NameDescriptor

cc.redberry.core.context.NameDescriptor

This class reflects a unique mathematical nature of simple tensors and tensor fields. It holds the information about string name of simple tensor, structure of its indices and arguments (in case of tensor field). Two simple tensors are considered to have different mathematical nature if and only if their name descriptors are not equal. Each simple tensor with unique mathematical nature have its own unique integer identifier, which is hold in the name descriptor. For example, tensors A_mn and A_ij have same mathematical origin and thus have similar integer identifiers and both have unique same name descriptor (same reference). In contrast, for example, tensors A_mn and A_i have different mathematical origin and different integer identifiers.

This class have no public constructor, since Redberry should be confident, that tensors with same mathematical origin have same descriptors, and the work with descriptors should be carried out through {@link NameManager}. The only way to receive name descriptor from raw information about tensor is via {@link NameManager#mapNameDescriptor(String,cc.redberry.core.indices.StructureOfIndices)}. In order to receive the descriptor from unique simple tensor identifier, one should use {@link NameManager#getNameDescriptor(int)}
@author Dmitry Bolotin @author Stanislav Poslavsky @since 1.0


        StructureOfIndices[] structures = new StructureOfIndices[argIndices.length + 1];
        structures[0] = indices.getStructureOfIndices();
        for (int i = 0; i < argIndices.length; ++i)
            structures[i + 1] = argIndices[i].getStructureOfIndices();
        NameDescriptor descriptor = CC.getNameManager().mapNameDescriptor(name, structures);
        return new TensorField(descriptor.getId(),
                UnsafeIndicesFactory.createOfTensor(descriptor.getSymmetries(), indices),
                arguments, argIndices);
    }

View Full Code Here

    public static TensorField field(int name, SimpleIndices indices, SimpleIndices[] argIndices, Tensor[] arguments) {
        if (argIndices.length != arguments.length)
            throw new IllegalArgumentException("Argument indices array and arguments array have different length.");
        if (arguments.length == 0)
            throw new IllegalArgumentException("No arguments in field.");
        NameDescriptor descriptor = CC.getNameDescriptor(name);
        if (descriptor == null)
            throw new IllegalArgumentException("This name is not registered in the system.");
        if (!descriptor.isField())
            throw new IllegalArgumentException("Name correspods to simple tensor (not a field).");
        if (descriptor.getStructuresOfIndices().length - 1 != argIndices.length)
            throw new IllegalArgumentException("This name corresponds to field with different number of arguments.");
        if (!descriptor.getStructureOfIndices().isStructureOf(indices))
            throw new IllegalArgumentException("Specified indices are not indices of specified tensor.");
        for (int i = 0; i < argIndices.length; ++i) {
            if (!descriptor.getStructuresOfIndices()[i + 1].isStructureOf(argIndices[i]))
                throw new IllegalArgumentException("Arguments indices are inconsistent with field signature.");
            if (!arguments[i].getIndices().getFree().equalsRegardlessOrder(argIndices[i]))
                throw new IllegalArgumentException("Arguments indices are inconsistent with arguments.");
        }
        return new TensorField(name,
                UnsafeIndicesFactory.createOfTensor(descriptor.getSymmetries(), indices),
                arguments, argIndices);
    }

View Full Code Here

     * @return new instance of {@link TensorField} object
     */
    public static TensorField field(int name, SimpleIndices indices, Tensor[] arguments) {
        if (arguments.length == 0)
            throw new IllegalArgumentException("No arguments in field.");
        NameDescriptor descriptor = CC.getNameDescriptor(name);
        if (descriptor == null)
            throw new IllegalArgumentException("This name is not registered in the system.");
        if (!descriptor.getStructureOfIndices().isStructureOf(indices))
            throw new IllegalArgumentException("Specified indices are not indices of specified tensor.");
        SimpleIndices[] argIndices = new SimpleIndices[arguments.length];
        for (int i = 0; i < arguments.length; ++i)
            argIndices[i] = IndicesFactory.createSimple(null, arguments[i].getIndices().getFree());
        return new TensorField(name,
                UnsafeIndicesFactory.createOfTensor(descriptor.getSymmetries(), indices),
                arguments, argIndices);
    }

View Full Code Here

     * @return instance of specified simple tensor with specified indices
     */
    public static SimpleTensor setIndices(SimpleTensor tensor, SimpleIndices indices) {
        if (tensor.getIndices() == indices) return tensor;


        NameDescriptor descriptor = tensor.getNameDescriptor();
        if (!descriptor.getStructureOfIndices().isStructureOf(indices))
            throw new IllegalArgumentException("Illegal structure of indices.");


        if (indices.size() == 0)
            return tensor;


        if (descriptor.isField())
            return new TensorField(tensor.name,
                    UnsafeIndicesFactory.createOfTensor(descriptor.getSymmetries(), indices),
                    ((TensorField) tensor).args, ((TensorField) tensor).argIndices);
        else
            return new SimpleTensor(tensor.name,
                    UnsafeIndicesFactory.createOfTensor(descriptor.getSymmetries(),
                            indices));
    }

View Full Code Here

        for (int i = 0; i < initialNamespaceSize; ++i) {
            int[] typesCount = new int[TYPES_COUNT];
            for (int j = 0; j < TYPES_COUNT; ++j)
                typesCount[j] = minIndices[j] + nextInt(maxIndices[j] - minIndices[j]);
            StructureOfIndices typeStructure = StructureOfIndices.create(TYPES, typesCount);
            NameDescriptor nameDescriptor = CC.getNameManager().mapNameDescriptor(nextName(), typeStructure);
            if (withSymmetries)
                addRandomSymmetries(nameDescriptor);
            namespace.add(nameDescriptor);
        }
    }

View Full Code Here


        if (!generateNewDescriptors)
            throw new IllegalArgumentException("No descriptor for such structure.");


        //create new nameDescriptor
        NameDescriptor nameDescriptor = CC.getNameManager().mapNameDescriptor(nextName(), typeStructure);
        if (withSymmetries)
            addRandomSymmetries(nameDescriptor);
        if (namespace.indexOf(nameDescriptor) == -1)
            namespace.add(nameDescriptor);
        return nameDescriptor;

View Full Code Here

                descriptor.getSymmetries().addSymmetry(type, Permutations.createPermutation(false, nextPermutation(typeData.length)));
        }
    }


    public SimpleTensor nextSimpleTensor(SimpleIndices indices) {
        NameDescriptor nd = nextNameDescriptor(indices.getStructureOfIndices());
        StructureOfIndices structureOfIndices = nd.getStructureOfIndices();
        int[] _indices = nextIndices(structureOfIndices);
        return Tensors.simpleTensor(nd.getId(), IndicesFactory.createSimple(nd.getSymmetries(), _indices));
    }

View Full Code Here

        int[] _indices = nextIndices(structureOfIndices);
        return Tensors.simpleTensor(nd.getId(), IndicesFactory.createSimple(nd.getSymmetries(), _indices));
    }


    public SimpleTensor nextSimpleTensor() {
        NameDescriptor nd = nextNameDescriptor();
        StructureOfIndices structureOfIndices = nd.getStructureOfIndices();
        int[] indices = nextIndices(structureOfIndices);
        return Tensors.simpleTensor(nd.getId(), IndicesFactory.createSimple(nd.getSymmetries(), indices));
    }

View Full Code Here

     * @param name    string name of the tensor
     * @param indices indices
     * @return new instance of {@link SimpleTensor} object
     */
    public static SimpleTensor simpleTensor(String name, SimpleIndices indices) {
        NameDescriptor descriptor = CC.getNameManager().mapNameDescriptor(name, indices.getStructureOfIndices());
        return new SimpleTensor(descriptor.getId(),
                UnsafeIndicesFactory.createOfTensor(descriptor.getSymmetries(),
                        indices));
    }

View Full Code Here

     * @param name    int name of the tensor
     * @param indices indices
     * @return new instance of {@link SimpleTensor} object
     */
    public static SimpleTensor simpleTensor(int name, SimpleIndices indices) {
        NameDescriptor descriptor = CC.getNameDescriptor(name);
        if (descriptor == null)
            throw new IllegalArgumentException("This name is not registered in the system.");
        if (!descriptor.getStructureOfIndices().isStructureOf(indices))
            throw new IllegalArgumentException("Specified indices are not indices of specified tensor.");
        return new SimpleTensor(name,
                UnsafeIndicesFactory.createOfTensor(descriptor.getSymmetries(),
                        indices));
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of cc.redberry.core.context.NameDescriptor

cc.redberry.core.parser.ParserSimpleTensor

cc.redberry.core.parser.ParserTensorField

cc.redberry.core.performance.kv.OneLoopInput

cc.redberry.core.tensor.random.RandomProduct

cc.redberry.core.tensor.random.RandomTensor

cc.redberry.core.tensor.random.TRandom

cc.redberry.core.tensor.Tensors

cc.redberry.physics.feyncalc.TraceUtils

cc.redberry.physics.oneloopdiv.OneLoopInput

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.