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package org.openl.rules.diff.hierarchy;

import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

public class PropertySet {
    private final Map properties;

    public PropertySet() {
        properties = new HashMap<>();
    }

    public ProjectionProperty get(String propertyName) {
        return properties.get(propertyName);
    }

    public void add(ProjectionProperty property) {
        String propertyName = property.getName();
        if (properties.get(propertyName) != null) {
            // property with such name exists already
            throw new IllegalArgumentException(String.format("Property '%s' exists already.", propertyName));
        }

        properties.put(propertyName, property);
    }

    public Collection getAll() {
        return Collections.unmodifiableCollection(properties.values());
    }
}