com.opengamma.analytics.financial.curve.building.CurveBuildingBlock.java Source code

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Here is the source code for com.opengamma.analytics.financial.curve.building.CurveBuildingBlock.java

Source

/**
 * Copyright (C) 2012 - present by OpenGamma Inc. and the OpenGamma group of companies
 * 
 * Please see distribution for license.
 */
package com.opengamma.analytics.financial.curve.building;

import java.util.LinkedHashMap;
import java.util.Set;

import org.apache.commons.lang.ObjectUtils;

import com.opengamma.util.ArgumentChecker;
import com.opengamma.util.tuple.Pair;

/**
 * Class describing a block of curves build together.
 */
public class CurveBuildingBlock {

    /**
     * The list of curve in the block as a map: Name to a pair of integers: 
     *   1) Start of the curve parameters in the array of all parameters of the block. 2) Number of parameters in the curve
     */
    private final LinkedHashMap<String, Pair<Integer, Integer>> _unit;

    /**
     * Constructor from a map. A new map is created.
     * @param block The curve block. Not null.
     */
    public CurveBuildingBlock(LinkedHashMap<String, Pair<Integer, Integer>> block) {
        ArgumentChecker.notNull(block, "Curve building block");
        _unit = new LinkedHashMap<String, Pair<Integer, Integer>>();
        _unit.putAll(block);
    }

    /**
     * Returns the start index of the given string in the array of all parameters.
     * @param name The string name.
     * @return The start index.
     */
    public Integer getStart(final String name) {
        return _unit.get(name).getFirst();
    }

    /**
     * Returns the number of parameters for the curve.
     * @param name The curve name.
     * @return The number of parameters.
     */
    public Integer getNbParameters(final String name) {
        return _unit.get(name).getSecond();
    }

    /**
     * Returns a set with all the curve names.
     * @return The set of names.
     */
    public Set<String> getAllNames() {
        return _unit.keySet();
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + _unit.hashCode();
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        CurveBuildingBlock other = (CurveBuildingBlock) obj;
        if (!ObjectUtils.equals(_unit, other._unit)) {
            return false;
        }
        return true;
    }

}