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Signed-off-by: Geoffroy Jamgotchian <[email protected]>
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94 changes: 94 additions & 0 deletions
94
src/main/java/com/powsybl/openloadflow/equations/AbstractVector.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /** | ||
| * Copyright (c) 2022, RTE (http://www.rte-france.com) | ||
| * This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
| */ | ||
| package com.powsybl.openloadflow.equations; | ||
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| import java.util.Objects; | ||
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| /** | ||
| * @author Geoffroy Jamgotchian <geoffroy.jamgotchian at rte-france.com> | ||
| */ | ||
| public abstract class AbstractVector<V extends Enum<V> & Quantity, E extends Enum<E> & Quantity> implements Vector { | ||
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| protected final EquationSystem<V, E> equationSystem; | ||
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| private double[] array; | ||
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| private enum Status { | ||
| VALID, | ||
| VECTOR_INVALID, // structure has changed | ||
| VALUES_INVALID // same structure but values have to be updated | ||
| } | ||
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| private Status status = Status.VECTOR_INVALID; | ||
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| private final EquationSystemIndexListener<V, E> equationSystemIndexListener = new EquationSystemIndexListener<>() { | ||
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| @Override | ||
| public void onEquationChange(Equation<V, E> equation, ChangeType changeType) { | ||
| invalidateVector(); | ||
| } | ||
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| @Override | ||
| public void onVariableChange(Variable<V> variable, ChangeType changeType) { | ||
| // nothing to do | ||
| } | ||
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| @Override | ||
| public void onEquationTermChange(EquationTerm<V, E> term) { | ||
| // nothing to do | ||
| } | ||
| }; | ||
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| protected AbstractVector(EquationSystem<V, E> equationSystem) { | ||
| this.equationSystem = Objects.requireNonNull(equationSystem); | ||
| equationSystem.getIndex().addListener(equationSystemIndexListener); | ||
| } | ||
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| protected void invalidateValues() { | ||
| if (status == Status.VALID) { | ||
| status = Status.VALUES_INVALID; | ||
| } | ||
| } | ||
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| protected void invalidateVector() { | ||
| status = Status.VECTOR_INVALID; | ||
| } | ||
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| protected void validate() { | ||
| status = Status.VALID; | ||
| } | ||
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| @Override | ||
| public double[] getArray() { | ||
| switch (status) { | ||
| case VECTOR_INVALID: | ||
| array = createArray(); | ||
| validate(); | ||
| break; | ||
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| case VALUES_INVALID: | ||
| updateArray(array); | ||
| validate(); | ||
| break; | ||
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| default: | ||
| // nothing to do | ||
| break; | ||
| } | ||
| return array; | ||
| } | ||
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| protected abstract double[] createArray(); | ||
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| protected abstract void updateArray(double[] array); | ||
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| @Override | ||
| public void minus(Vector other) { | ||
| Objects.requireNonNull(other); | ||
| Vectors.minus(getArray(), other.getArray()); | ||
| } | ||
| } |
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60 changes: 60 additions & 0 deletions
60
src/main/java/com/powsybl/openloadflow/equations/EquationVector.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| /** | ||
| * Copyright (c) 2022, RTE (http://www.rte-france.com) | ||
| * This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
| */ | ||
| package com.powsybl.openloadflow.equations; | ||
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| import com.google.common.base.Stopwatch; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import java.util.Arrays; | ||
| import java.util.concurrent.TimeUnit; | ||
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| import static com.powsybl.openloadflow.util.Markers.PERFORMANCE_MARKER; | ||
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| /** | ||
| * @author Geoffroy Jamgotchian <geoffroy.jamgotchian at rte-france.com> | ||
| */ | ||
| public class EquationVector<V extends Enum<V> & Quantity, E extends Enum<E> & Quantity> extends AbstractVector<V, E> | ||
| implements StateVectorListener { | ||
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| private static final Logger LOGGER = LoggerFactory.getLogger(EquationVector.class); | ||
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| public EquationVector(EquationSystem<V, E> equationSystem) { | ||
| super(equationSystem); | ||
| equationSystem.getStateVector().addListener(this); | ||
| } | ||
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| @Override | ||
| public void onStateUpdate() { | ||
| invalidateValues(); | ||
| } | ||
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| @Override | ||
| protected double[] createArray() { | ||
| double[] array = new double[equationSystem.getIndex().getSortedEquationsToSolve().size()]; | ||
| updateArray(array); | ||
| return array; | ||
| } | ||
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| @Override | ||
| protected void updateArray(double[] array) { | ||
| Stopwatch stopwatch = Stopwatch.createStarted(); | ||
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| var equations = equationSystem.getIndex().getSortedEquationsToSolve(); | ||
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| if (array.length != equations.size()) { | ||
| throw new IllegalArgumentException("Bad equation vector length: " + array.length); | ||
| } | ||
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| Arrays.fill(array, 0); // necessary? | ||
| for (Equation<V, E> equation : equations) { | ||
| array[equation.getColumn()] = equation.eval(); | ||
| } | ||
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| LOGGER.debug(PERFORMANCE_MARKER, "Equation vector updated in {} us", stopwatch.elapsed(TimeUnit.MICROSECONDS)); | ||
| } | ||
| } |
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